bluuebunny/crossref_metadata_2025 huggingface dataset:
Caracterización farmacoterapéutica en pacientes con accidente cerebrovascular isquémico en un hospital de Soledad, Atlántico
Authors: Sepúlveda N Jaleixy , Acosta M Carolina , De La Hoz S Donaldo , Bolivar G Samir
Published: November 2024

Objective: to characterize the pharmacotherapy of patients with acute ischemic stroke (ACVi) treated with recombinant tissue plasminogen activator (rt-PA) in a hospital in Soledad - Atlántico in the period 2015-2020. Materials and methods: a retrospective descriptive observational study was carried out, for the quantitative variables the Kolmogórov – Smirnov normality test was applied. The data that complied with the assumption of normality (p>0.05) were presented as means ± standard deviation, those that did not comply were presented as medians. Categorical variables were shown as frequencies or percentages. Results: 72 patients with a median age of 74 years were studied, 52.2% of the population were men, 69.4% suffered from arterial hypertension, 26.4% received platelet aggregation inhibitors, excluding heparin, and 23, 6% were administered drugs belonging to the therapeutic group of heparins. Twenty-five percent of the population developed hemorrhage: 19.4% had intracerebral hemorrhage, 4.2% developed subarachnoid hemorrhage, and 1.4% had gastrointestinal hemorrhage. Conclusion: it was possible to identify opportunities for improvement in the management of patients with stroke and in the use of alteplase. A higher percentage of bleeding complications was found compared to studies previously conducted in Colombia. Further investigations are required to corroborate the results, due to the limited number of participants and scarce data related to clinical histories.
Efecto de intervenciones musicoterapéuticas sobre prevención del delirium en UCI
Authors: Bojacá B Laura Cristina , Ortiz O Juan Alberto , Pérez P César Alberto
Published: November 2024

Objetivo: Identificar la efectividad de las intervenciones musicoterapéuticas sobre la prevención del delirium en individuos con factores de riesgo internos en la UCI, a favor de la modulación de constantes vitales, el menor requerimiento de Ventilación Mecánica Invasiva (VMI) y el bienestar de los participantes. Métodos: Esta investigación corresponde a un estudio pre-experimental, de carácter cualitativo, caracterizado por la aplicación de tests para delirium pre y post-intervención (CAM-ICU y equivalentes sonoromusicales), el registro de constantes vitales antes y después de la sesión, la determinación de la necesidad de VMI, la valoración de 6 categorías de análisis aplicables a cada sesión, la recolección de percepciones personales sobre la terapia y la valoración de productos sonoro-musicales. Resultados: Ninguno de los 7 participantes expuestos a la intervención presentó delirium (uno de ellos en estado post delirium), 6 de ellos no requirieron de VMI (excepto por un individuo que decidió retirarse del estudio con posterior necesidad de VMI) y se generaron 3 productos sonoromusicales que expusieron la búsqueda y alcance de bienestar en el transcurso de las sesiones. Conclusión: De dicha estrategia y su aplicación variada en cantidad, frecuencia y duración, se concluye que favorece la prevención del delirium en la UCI, disminuye, indirectamente, la necesidad de VMI y aporta positivamente al bienestar de los participantes; sin embargo, aún hay falta de consenso en cuanto a la dosificación de la terapia y existe la necesidad de más estudios con rigurosidad metodológica y su reproducción en otros escenarios clínicos.
Modelo de madurez de procesos aplicado a una entidad pública de servicios de salud en el Perú
Authors: Fernández Bringas Alberto Moisés Ramón , Ramirez García Alejandro Sebastián , Córdova García Ronald Darwin
Published: November 2024

Objetivo. Evaluar el estado de desarrollo del proceso de atención prehospitalaria y las acciones a seguir para transitar a mejores niveles de desempeño. Materiales y Métodos. La investigación fue cuantitativa, no experimental, de alcance descriptivo y diseño de corte transversal. La recopilación de información consistió en la aplicación de una encuesta a una muestra de trabajadores, empleando la metodología del modelo de madurez de procesos de Hammer. La población fue de 300 colaboradores del proceso atención prehospitalaria. El estudio empleó muestreo por conveniencia con aplicación a un grupo de 32 trabajadores. Resultados. Los facilitadores del proceso atención prehospitalaria: diseño, ejecutores, responsables, infraestructura e indicadores, alcanzaron el nivel cero (P-0), equivalente a un funcionamiento errático con una cultura incipiente de gestión por procesos, situación que genera alta variabilidad y riesgo de no alcanzar los resultados esperados.  Conclusiones.  La atención prehospitalaria es el proceso misional más importante, puesto que atiende las emergencias médicas. La cultura incipiente en la disciplina de la gestión por procesos ha determinado el nivel cero de madurez, por lo que resulta importante implementar este enfoque de gestión incluyendo la transformación digital a fin de alcanzar mejores niveles de desempeño. La investigación identificó acciones por desarrollar como: la adopción de la gestión por procesos; el fortalecimiento de las capacidades de los ejecutores y responsables; la dotación de mejor infraestructura para los sistemas de información, tecnología y gestión de recursos humanos; la implementación de indicadores de procesos para el seguimiento y mejora de los procesos.
Online Interest in Elf Bar in the United States: Google Health Trends Analysis
Authors: Bhagavathula Akshaya Srikanth , Dobbs Page D
Published: November 2024

Background

Despite the popularity of JUUL e-cigarettes, other brands (eg, Elf Bar) may be gaining digital attention.

Objective

This study compared Google searches for Elf Bar and JUUL from 2022 to 2023 using Google Health Trends Application Programming Interface data.

Methods

Using an infodemiology approach, we examined weekly trends in Google searches (per 10 million) for “Elf Bar” and “JUUL” at the US national and state levels from January 1, 2022, to December 31, 2023. Joinpoint regression was used to assess statistically significant trends in the search probabilities for “Elf Bar” and “JUUL” during the study period.

Results

Elf Bar had less online interest than JUUL at the beginning of 2022. When the US Food and Drug Administration denied JUUL marketing authority on June 23, 2022, JUUL searches peaked at 2609.3 × 107 and fell to 83.9 × 107 on September 3, 2023. Elf Bar searches surpassed JUUL on July 10, 2022, and steadily increased, reaching 523.2 × 107 on December 4, 2022. Overall, Elf Bar’s weekly search probability increased by 1.6% (95% CI 1.5%-1.7%; P=.05) from January 2022 to December 2023, with the greatest increase between May 29 and June 19, 2022 (87.7%, 95% CI 35.9%-123.9%; P=.001). Elf Bar searches increased after JUUL’s suspension in Pennsylvania (1010%), Minnesota (872.5%), Connecticut (803.5%), New York (738.1%), and New Jersey (702.9%).

Conclusions

Increasing trends in Google searches for Elf Bar indicate that there was a growing online interest in this brand in the United States in 2022.
Exploring the Feasibility and Acceptability of Technological Interventions to Prevent Adolescents’ Exposure to Online Pornography: Qualitative Research
Authors: Turvey Jake , McKay Dana , Kaur Sarah T , Castree Natasha , Chang Shanton , Lim Megan S C
Published: November 2024

Background

Amid growing concern over children’s access to online pornography, policy makers are looking toward new and emerging technological concepts for unexplored solutions including artificial intelligence and facial recognition.

Objective

This study sought to explore and ideate emerging technological interventions that are feasible, acceptable, and effective in preventing and controlling the exposure of young people to online pornographic material.

Methods

We conducted a series of qualitative co-design workshops with both adult (n=8; aged 32-53 years) and adolescent participants (n=4; aged 15-17 years) to ideate potential technological interventions that are feasible, acceptable, and effective at preventing and controlling the exposure of young people to online pornographic material. A story stem methodology was used to explore participants’ attitudes toward two unique technological prototypes.

Results

Participants expressed a generally favorable view of the proposed technological concepts but remained unconvinced of their overall utility and effectiveness in preventing the intentional viewing of pornography by young people. Age-appropriate parent-child conversations remained participants’ preferred approach to mitigating potential harms from pornographic material, with parents also expressing a desire for more educational resources to help them better navigate these discussions. User privacy and data security were a primary concern for participants, particularly surrounding the use and collection of biometric data.

Conclusions

Internationally, policy makers are taking action to use age assurance technologies to prevent children’s access to online pornography. It is important to consider the needs and opinions of parents and young people in the use and implementation of these technologies. Participants in this study were generally supportive of new and emerging technologies as useful tools in preventing the accidental exposure of young people to online pornographic material. However, participants remained less convinced of their ability to avert intentional viewing, with substantial concerns regarding technological efficacy, adaptability, and user privacy. Further, co-design and prototype refinement are needed to better understand user acceptability and comfortability of these new technological interventions, alongside additional research exploring sociocultural differences in information needs and user experiences.
Clinical and morphometric features in cervical spine pathology in humans and animals
Authors: Andreeva T.O. , Stoyanov O.M. , Mirdjuraev E.M. , Chebotareva G.M. , Kalashnikov V.I. , Vastyanov R.S. , Dariy V.I.
Published: November 2024

Background. The neck, its bone-cartilaginous and muscle apparatus, etc. high activity is well known. Cervical spine degenerative-dystrophic processes are considered to be an urgent problem. The purpose of the study was to determine the clinical and morphometric changes of the cervical spine in humans and animals with neck pain based on a clinical and neurological examination, determination of the vertebral body density, their configuration, and ratio for timely correction and prognosis of this patho­logy. Materials and methods. Pain intensity was studied in humans and animals using the adapted visual-analogue scale. The inde­xes of computer tomography with measurement of vertebral body density, and morphometric indexes with an emphasis on C5-C7 le­vel were also studied. All studies were conducted following existing bioethical standards. Results. The pathology of spine configuration was registered in 84.6 % of the examined patients in the form of angular kyphosis or straightened lordosis, more often in women. It was observed in 34.7 % of cases in dogs and cats. The normal configuration is more common: in cats — 78.6 % and in dogs of small breeds — 78.5 %, in large breed dogs — only 26.3 %, and deformations were more frequent than in cats and small dogs (2.7 times more). The cervical vertebrae bodies density in all groups decreased toward the caudal direction with a difference of 18.1 % in humans. In cats — 2.7 %, in dogs of small breeds, it was higher (7.5 %), and in large breed dogs, it reached 14.3 %. The maximum deviations of the studied indicators were found in humans and maximally coincided with those in dogs of large breeds. Conclusions. Thus, animals, especially dogs of large breeds, can serve as a model for studying etiopathogenetic factors, the course, prognosis of degeneration of the bone-cartilage apparatus.
Relationship of chronic low back pain intensity with functional activity, stress and quality of life in working-age adults
Authors: Ovdii M.A. , Cherepenko I.V. , Tsyhanok A.M. , Dmytrenko A.M. , Kravets R.А.
Published: November 2024

Background. Low back pain (LBP) is a global problem in the modern world. A detailed study of the relationship between pain intensity and the indicators with which it may be associated will allow optimising approaches to the treatment and rehabilitation of patients with chronic LBP. The purpose was to eva­luate the relationship between the intensity of chronic LBP and indicators of functional activity, stress and quality of life in subjects of working age. Materials and methods. A survey was conducted among 159 persons aged 18-65 years with LBP lasting more than 3 months. Using a Google-form, the participants were given a questionnaire that included socio-demographic, anthropometric characteristics, lifestyle data, bad habits, physical activity (PhA) and stress levels, quality of life, and impairment. The intensity of pain was measured at the first visit to a PhRM doctor using a visual analogue scale (VAS). Results. The study involved 159 patients, 65.7 % women and 34.3 % men, with a mean VAS pain intensity of 46.5 ± 18.6 mm. A weak positive correlation was found between pain intensity and age (r = 0.30, p < 0.001), but no significant relationship was found between pain intensity and anthropometric parameters. Subjects who smoke, have insufficient PhA and sleep disturbance had higher pain intensity scores (57.6 ± 15.2 mm (p = 0.04), 49.0 ± 18.8 mm (p = 0.12), 49.7 ± 19.9 mm (p = 0.002), respectively). Sitting time more than 6 hours had significant associations with pain intensity (p < 0.001). A weak positive correlation was found between pain intensity on the VAS scale and stress le­vel (r = 0.24, p = 0.002), a moderate positive correlation between pain intensity and impairment (r = 0.36, p < 0.001) and a mo­derate negative correlation between quality of life and pain intensity. ­Conclusions. There was a significant association between pain intensity and age, smoking, sleep disturbance, sedentary work for more than 6 hours, higher stress levels, impaired functioning and lower quality of life.
Long-term result of unicompartmental knee arthroplasty in knee osteoarthritis secondary to chondrodysplasia
Authors: Guzhevskyi I.V. , Gerasymenko S.I. , Kachan D.I.
Published: November 2024

Background. In determining the indications for unicondylar endoprosthesis of the knee joint the literature practically does not cover the results of such interventions in knee osteoarthritis in patients with chondrodysplasia. The purpose of our report was to publish our observation of the long-term results of unicondylar endoprosthesis of the knee joint in a patient with knee osteoarthritis due to chondrodysplasia. Material and methods. We operated on a patient with chondrodysplasia who came to the clinic at the age of 28 with complaints of pain in the right knee joint during walking, “clicking” and joint swelling. The radiological and magnetic resonance examination results of the right knee determined the presence of an area of aseptic necrosis of the medial femoral condyle. Considering the concordance of lower limb axis disorders, it was decided to perform unicondylar arthroplasty with preservation of the preoperative varus deformity to maintain the motor stereotype's compensation state. Results. In the postoperative period, there were no complications in wound healing, the rate of recovery of movements corresponded to similar indicators in patients with knee osteoarthritis of other etiologies after similar interventions, and the patient was discharged from the hospital on the sixth day after surgery with the preoperative range of motion in the operated joint. At the examination 10 years after the operation there were no complaints from the operated knee joint, the movements in the operated joint remained in the same range, and the patient moved without additional support with full load on the operated limb. Conclusions. Our results indicate the appropriateness of unicompartmental knee arthroplasty in patients with knee osteoarthritis secondary to.
Progress in the Study of Diabetic Nephropathy Markers
Authors: Wang Lesheng , Zhang Yanjiao , Hu Yongyue , Su Rui , Yan Jiangli , Sun Chuanmei , Luo Lin , Liu Shengjun , Lu Jinzhi
Published: November 2024

Diabetic nephropathy (DN) is the principal consideration of end-stage diabetic nephropathy in China, second only to chronic glomerulonephritis. It is the most common complication of diabetes and the cause of death in diabetic patients. The clinical manifestations of DN are proteinuria, edema, hypertension, and progressive renal damage, and its continuous development can turn into nephrotic syndrome and uremia. It has been reported that urinary microalbumin, cystatin C and homocysteine are related to the diagnosis of renal diseases. In addition, pathological examination of renal biopsy, as the golden standard, plays a vital role in clinical diagnosis of DN. In the meantime, with the rise of biomarkers research, such as Genetic Markers, miRNAs and AGEs, we can evaluate the renal function of diabetic patients by detecting these markers as early as possible. Taking into account the above information, we focus on research advances in the association of microalbuminuria, urinary inhibitory C, serum homocysteine, renal biopsy and biomarkers with DN.
The Impact of pH and Growth Phases on Photosynthetic Pigments and Carotene of Coelastrella saipanensis N. Hanagata (Scenedsmacese, Shaerophleales)
Authors: Fadeel Zeina Gany , Hassan Fikrat M. , Al-Mahdawe M.M.I.
Published: November 2024

The present study aimed to investigate the effects of level pH and the growth phases of Coelastrella saipanensis on Chlorophyll a,b, total, and Carotene. The algae were cultured in BG11 media and grown at different pH levels. We measured chlorophyll a, b, total chlorophyll, growth phases, and carotene concentrations. The results showed that at pH 8.5, the measurements of photosynthetic pigments-chlorophyll a, Chlorophyll b, and the total chlorophyll (0.183, 0.268, and 0.433 mg L-1, respectively). The highest values of chlorophyll a (0.185 mg L-1), and b (0.339 mg L-1), and the total chlorophyll (0.492 mg L-1) were recorded in the stationary phase. In addition, the study found that at pH 8.5 and the beginning of the stationary phase, the highest levels of chlorophyll a, b, and total chlorophyll were 0.216, 0.398, and 0.603 mg L-1, respectively, in correlation with pH-cell harvesting phase interaction. Similarly, carotene concentrations were increased as photosynthetic pigments and recorded the highest values (2.533 mg L-1) at pH 8.5, and 3.275 mg L-1 at the stationary phase. Therefore, the algal C. saipanensis is a vital source of carotene to support nutrition and health It is used as an antioxidant.
FAUNA FÓSIL DE LA FORMACIÓN SANTA CLARA (CÁRNICO) DEL ESTADO DE SONORA
Authors: Alencaster de Cserna Gloria
Published: November 2024

En este trabajo se describen 14 especies de invertebrados marinos fósiles, de los cuales 12 se citan por primera vez en México. Esta fauna está formada principalmente por pelecípodos, entre los cuales se encuentran cuatro especies nuevas (Nuculana curvirostris, Myophoria mexicana, Myophorigonia salasi y Mytilus (Clhoromya) sonorensis). El material procede de la Formación Santa Clara, de edad cárnica, de la parte central del Estado de Sonora.
Stomiosphaera cardiiformis sp. nov. del Cretácico Superior de Cuba
Authors: Ayala-Castañares Agustín , Seiglie George A.
Published: November 2024

Se describe e ilustra Stomiosphaera cardiiformis sp. nov., microfósil "Incertae sedis" del Cretácico Superior (Campaniano-Maastrichtiano), procedente de sedimentos de la provincia Las Villas, República de Cuba. El hallazgo de esta nueva epecie en rocas más jóvenes que el Turoniano, extiende la distribución estratigráfica del género, pues Bonet (1956, p. 61-63) y Bonet y Trejo (1958), la sitúan de Albiano la Turoniano. Los sedimentos en que aparece en Cuba tienen edad bien definida, pues se encontraron asociados con la nueva especie algunos géneros de foraminíferos grandes bien conocidos desde el punto de vista estratigráfico, como son Sucoperculina, Gavelinella, Vaughaniana, Asterorbis y   Orbitoides.
Se discute la posición taxonómica del género y la notable homeomorfía entre Stomiosphaera cardiiformis sp. nov. y el aparato embrionario de Asterorbis aguayoi Palmer.
SISTEMÁTICA Y BIOESTRATIGRAFÍA DE LOS FORAMINÍFEROS GRANDES DEL CRETÁCICO SUPERIOR (CAMPANIANO Y MAASTRICHTIANO) DE CUBA
Authors: Seiglie George A. , Ayala-Castañares Agustín
Published: November 2024

Se estudian los foraminíferos grandes del Campaniano y Maastrichtiano de Cuba desde el punto de vista sistemático y bioestratigráfico, indicando tanto las formaciones como las edades en que aparecen y esbozando una zonación bioestratigráfica basada en esos microfósiles. 
También se hacen algunas consideraciones de carácter paleoecológico, considerando los conjuntos faunísticos que se presentan en cada caso. 
Dentro de este estudio, que podría considerarse preliminar, se hace un especial hincapié en los foraminíferos de la superfamilia Orbitoidoidea Schwager, 1876, señalando sus características morfológicas fundamentales, así como las bases para su clasificación. En el estudio sistemático, se mencionan e ilustran especies de foraminíferos grandes, correspondientes a los géneros Aktinorbitoides Brönnimann, 1948; Asterorbis Vaughan y Cole, 1937; Ayalaina Seiglie, 1960; "Borelis" Montfort, 1808; Conorbitoides Brönnimann, 1958; Cternorbitoides  Brönnimann, 1958; "Historbitoides"  Brönnimann, 1956; Lepidorbitoides Silvestri, 1907; Monolepidorbis Astre, 1927; Omphalocyclus Bronn, 1951-1952; Orbitoides d'Orbigny, 1847; Pseudorbitoides Douvillé, 1922; Rhabdorbitoides,  Brönnimann, 1955; Rhapydionina Stache, 1912, Siderolites Lamarck, 1801; Smoutina Drooger, 1960; Sulcoperculina Thalmann, 1938; y Vaughanina Palmer, 1934; entre ellas se describen tres especies y dos subespecies nuevas que son: Sulcoperculina minima sp. nov.; Orbitoides villasensis sp. nov., Vaughanina cubensis minor subsp. nov. y Vaughanina cubensis globosa subsp. nov. 
Acompañan el texto una tabla con la zonación bioestratigráfica propuesta, con la distribución de las especies a través de las biozonas, algunas gráficas de correlación de caracteres y 43 láminas ilustrando las especies.
SEMBLANZA DE LA DRA. GLORIA ALENCÁSTER YBARRA
Authors: Perrilliat Montoya María del Carmen
Published: November 2024

La doctora Gloria Alencáster Ybarra ha constituido, a lo largo de la segunda mitad del siglo XX, un baluarte importante en el avance de las Ciencias de la Tierra en nuestro país. Nació en la Ciudad de México en el seno de una pequeña y amorosa familia formada por Agustín Alencáster y María de Jesús Ybarra, y por sus dos queridas hermanas Perla y Artemisa. Ineludiblemente, la rectitud y honestidad de sus padres, su alto sentido de responsabilidad en todos los aspectos de la vida, su admiración por la ciencia, la cultura y la música, y los atributos trasmitidos a sus hijas en pláticas cotidianas de sobremesa, forjaron su espíritu. Su niñez y adolescencia transcurrieron en el centro de la ciudad de entonces, muy diferente al actual.
BIOESTRATIGRAFÍA DEL CONIACIANO SUPERIOR CAMPANIANO INFERIOR CON BASE EN EL ESTUDIO DE NANOFÓSILES CALCÁREOS DEL GRUPO AUSTIN, TEXAS, EUA
Authors: Hernández-Bernal Patricia
Published: November 2024

Se realizó el estudio de 14 muestras de una sección compuesta del Grupo Austin en Texas analizando nanofósiles calcáreos. Cincuenta y siete especímenes de nanofósiles calcáreos fueron identi cados al menos a nivel genérico. La primera aparición así como la extinción de las especies índices, además de la ocurrencia de estas especies fue registrada para de nir la posición de las biozonas. Las muestras fueron datadas por el nanoplancton calcáreo y se utilizó el esquema zonal de Sissinh (1977) . Las muestras fueron datadas como Coniaciano superior – medio a Campaniano inferior, con base en las especies índice: Micula decussata (CC 14), Lucianorhabdus cayeuxii (CC 16), Calculites obscurus (CC 17) y Bronsonia cf. B. parca (CC 18).
Los resultados fueron comparados con bizonaciones previas de nanoplancton calcáreo, foraminíferos planctónicos y amonites y son consistentes para zonaciones cosmopolitas y regionales dentro de Texas, pero no son consistentes con una zonación regional para Mississippii y Alabama.
Estos estudios serán comparados a corto plazo con estudios de muestras de Pemex Región Norte, para veri car si las muestras mexicanas corresponden a las mismas formaciones del Grupo Austin en Texas.
La vida a través del tiempo
Authors: Hernández Delfino
Published: November 2024

La historia de nuestro Planeta Tierra, ha pasado por una serie de sucesos muy importantes, pero sin duda alguna uno de los eventos más espectaculares es la aparición de la vida. La vida en el pasado esta representada por los fósiles, por lo tanto, la ciencia que estudia los fósiles es la Paleontología. Los fósiles, nos proporciona una información infinita, son tan importantes, que es la única manera de interpretar la Vida a Través del Tiempo, el fósil es el libro abierto de la vida. Los fósiles se encuentran principalmente en rocas sedimentarias, pero pueden encontrarse en rocas metamórficas de muy baja temperatura, o en rocas ígneas, como cenizas volcánicas, pero son muy escasas, también se pueden encontrar en glaciares, ámbar o algunas chapopoteras. Los fósiles pueden estar representados por huellas, marcas, madrigueras, coprolitos, moldes, las formas completas o fragmentadas. Existe una cantidad impresionante de fósiles en el mundo, que se encuentran alojados en un registro, llamado “Registro Fósil”. Este registro fósil, es incompleto, pero suficiente para entender que sucedió en el pasado. La edad del planeta Tierra se calcula en unos 4,600 millones de años, y los primeros fósiles, corresponden a organismos microscópicos como bacterias, algas calcáreas, que probablemente aparecieron hace unos 3000 a 3800 millones de años, en un tiempo geológico denominado Precámbrico.
New Eocene bivalves from Bateque Formation, Baja California Sur, Mexico
Authors: Morales-Ortega Priscila , González-Barba Gerardo , Nava-Sánchez Enrique H. , Vera-Dimas Diego R.
Published: November 2024

A total of 11 new mollusc bivalves are reported (Lithophaga sp., Anadara? sp., Gryphaeostrea sanjuanicus sp. nov., Ostrea sp., cf. O. contracta amichel, Argopecten? sp., Chlamys sp. a, Chlamys sp. b, Pecten? sp., Tellina sp., Macrocallista sp. and Pitar sp.), in the Bateque Formation, which includes one of the most complete fossil records for the Eocene Epoch, in Baja California Sur, Mexico. Prior to this work, existing faunal lists were reviewed, resulting in 155 macroinvertebrate species reported for the Bateque Formation. The faunal assemblage indicates an age range of early Eocene (“Capay Stage”) to the late middle Eocene (“Tejon Stage”), and also it is characteristic of shallow marine water (inner shelf to outer) and tropical to subtropical climates. The abundance and diversity of macroinvertebrates previously reported and new records of molluscs contribute to the understanding of the origin of the different taxonomic groups in Baja California Sur and the Pacific Coast of North America. Most species are indicative of warm waters from the Tethys circum-global current, which created the conditions for a wide biotic exchange between marine organisms of the Atlantic, Gulf of Mexico-Caribbean, and Pacific.
Occurrence of Retrocypoda almelai Via Boada, 1959 (Decapoda: Retroplumidae) in the Eocene of Central Iran
Authors: Hassan-vand Marjan Khodaverdi , Bahrami Ali , Yazdi Mehdi , Ossó Àlex , Safari Amrollah , Martínez José Luis , Vega Francisco J.
Published: November 2024

The decapod crustacean Retrocypoda almelai Via Boada, 1959 is reported from Bartonian (middle Eocene) strata of Soh (North of Isfahan, Iran) and represents the most oriental record for the species, hitherto considered endemic and restricted to the western margin of Tethys. This finding is important to understand the paleobiogeographic distribution of retroplumid crabs, which were abundant during Late Cretaceous in America and Africa, but today their representatives are restricted to the Indopacific region.
Icnofósiles del Cámbrico Inferior de San José de Gracia, Sonora
Authors: Buitrón-Sánchez Blanca , Corona-González Nictzia , Cuen-Romero Francisco , Palafox-Reyes Juan José , Ramírez-Guerrero Greta
Published: November 2024

Se describen los icnofósiles Skolithos isp., Arenicolites isp., Palaeophycus isp., Asteriacites isp. y Asterosoma isp. procedentes de capas de arenisca con bioturbación del Cámbrico Inferior, en el miembro B del cerro Chihuarruita, ubicado en la región de San José de Gracia, centro–este del estado de Sonora. La asociación de organismos que produjo las icnitas demuestra que se desarrolló en ambientes marinos bentónicos, someros, con abundantes nutrientes que propiciaron una gran diversidad de los diferentes taxones en el Cámbrico Temprano de la región central de Sonora. La distribución de la biota cámbrica de San José de Gracia, entre ella los icnofósiles, denota que existió una amplia provincia faunística que comprende varias localidades en México (Caborca, Ures), en los Estados Unidos de América (Idaho, Utah, California), en Europa (Italia), Asia (India, Pakistán) y Tasmania que formaban parte del Océano Pantalásico.
Cretaceous corals from the Bisbee Group (Sonora, Mexico; Late Barremian - Early Albian): suborder Heterocoeniina
Authors: Löser Hannes
Published: November 2024

The current work constitutes the fourth part of the systematic revision of the corals from the Bisbee Group in Sonora, northwest Mexico (Late Barremian to Early Albian) and deals with the suborder Heterocoeniina. Twelve species from three families are reported: Carolastraeidae (genera Heteropistophyllum, Latusastrea, Pleurocoenia and Pleurodendron), Heterocoeniidae (genus Heterosmilia), and Paronastraeidae (genus Tiarasmilia) are described and illustrated. The family taxon Carolastraeidae is applied instead of the problematic family taxon Elasmocoeniidae which was temporarily applied to Heterocoeniina with a bilateral septal symmetry. With the exception of the genus Pleurocoenia, the genera are rare in the Cretaceous and do not show distinct palaeobiogeographic relationships
Cenomanian algae and microencrusters from the El Abra Formation, W Valles–San Luis Potosí, Mexico
Authors: Omaña Lourdes , Torres José Ramón , López Doncel Rubén , Alencaster Gloria
Published: November 2024

This work deals with calcareous algae and microencrusters (incertae sedis) from the upper part of the El Abra Formation, which crops out at the W Valles–San Luis Potosí Platform. Two assemblages of calcareous algae are recognized: one composed of rivulariacean-type cyanobacteria such as Cayeuxia kurdistanensis Elliott and Garwoodia sp. as well as the dasycladalean species Clypeina sp., Neomeris cretacea Steinmann, Salpingoporella hasi Conrad, Radoičić and Rey, Trinocladus cf. T. divnae Radoičić; the bryopsidales Boueina pygmaea Pia, Halimeda cf. H. elliotti Conard and Rioult, and the microencrusters Lithocodium aggregatum Elliot and Thaumatoporella parvovesiculifera (Raineri), and the other assemblage consisting of the gymnocodacean algae Permocalculus irenae Elliott and P. budaensis Johnson. The first assemblage is associated with the benthic foraminifera Pseudolituonella reicheli Marie, Hemicyclammina sigali Maync, Daxia cenomana Cuvillier and Szakall, Merlingina cretacea Hamoui and Saint Marc, is dated as mid-late Cenomanian on the basis of the stratigraphic distribution of the foraminifera, and suggests an oligotropic environment within the euphotic zone on the open marine platform. Over this is documented a succession consisting of a community with abundant gymnocodacean algae and a decrease in the benthic foraminifera which could be related to increased nutrient availability in mesotrophic conditions. The shallowwater association composed of the studied microfossils is typical of the Tethys Realm.
Jurassic flora in Southeast Mexico: importance and prospects of recent findings in the Mixteco Terrane
Authors: Lozano-Carmona Diego Enrique , Velasco-de León María Patricia
Published: November 2024

Laurasic outcrops with plant fossils from the Jurassic are well known in Europe and Asia, but in North America, toward the Mesoamerican region, floristic Jurassic outcrops are poorly known. This is due to the fact that samples were taken with the goal of geological and/or mining exploration, without a rigorous paleontological approach. This inconsistency in sampling in the region has limited the knowledge of its Jurassic flora. Recently, we initiated a campaign on standardized sampling in the Zorrillo-Taberna Indiferenciadas Formation with the aim of advancing the knowledge of the floristic composition of this formation. The methodology we employ consists of maintaining the stratigraphic control of the fossil origin and sampling in average constant conditions with regard to time and personnel. Taxonomic determination was based on diagnostic characters of each fossil-taxon. The floristic composition is dominated by Bennettitales, but Cycadales, Podozamitales and others are also present. The results show an increase in the floristic diversity of almost 50 % distributed in three stratigraphic zones. It is noteworthy to point out that the floristic association contains one genus and 14 species endemic to the region. In addition, we contribute with new fossil-taxa records of Cycadales, Caytoniales, Podozamitales and some genera of Bennettitales for both formation and region. Thus, we conclude that the application of the sampling method in other localities would consolidate a comprehensive paleofloristic list for the region, and we believe that the paleoflora of the region would set the groundwork for new Jurassic biogeographic analysis.
Presencia de Anisopyge perannulata y Ditomopyge cf. D. whitei (Trilobita, Proetidae) en el Pérmico (Guadalupiano medio) de la Formación Las Delicias, Coahuila, norte de México
Authors: Sour-Tovar Francisco , Quiroz-Barroso Sara A. , Quiroz-Barragán Jesús , Torres-Martínez Miguel Ángel , González-Mora Sergio
Published: November 2024

Se reporta la presencia de dos especies de trilobites proétidos, Anisopyge perannulata y Ditomopyge cf. D. whitei, en estratos del Pérmico medio de la Formación Las Delicias en la localidad Las Difuntas, suroeste de Coahuila. Los trilobites forman parte de una fauna con abundantes fusulínidos, esponjas, corales, braquiópodos, moluscos y otros invertebrados. Entre ellos resalta la presencia de Waagenoceras dieneri, Pseudagathiceras difuntense, Eumedlicottia burckhardti y otros cefalópodos que permiten establecer una edad del Wordiano-Capitaniano (Guadalupiano medio) para las rocas portadoras.
Holocene paleoenvironmental reconstruction of Laguna Babícora, Chihuahua, Northern Mexico, based on Ostracode Ecology and Shell Chemistry
Authors: Romero-Mayén Violeta A. , Carreño Ana Luisa
Published: November 2024

Fossil ostracodes from the Las Vacas trench measured in Laguna Babícora, Chihuahua, Mexico were analyzed taphonomically, and the shells of Limnocythere bradburyi were tested for trace-elements. Chronological control of the sediments was established using two calibrated 14C ages placing plant material at 9250 and 990 years B.P. Ostracode association is represented by Candona caudata, Eucandona patzcuaro, Cypridopsis vidua, Limnocythere platyforma and Limnocythere bradburyi. Population structure and taphonomy indicate a biocenosis living in a low energy lake, fluctuating from fresh to hyposaline water. Ostracode abundances in the studied interval ranged from 698 to 2 valves/g of sediment. Water salinity was established between 100 – 5000 ppm. Shell Mg/Ca molar ratios were used to interpret changes in lake temperature, with calculated temperatures ranging from 11.9 °C to 7.3 °C, revealing a low-temperature trend during the early to late Holocene. Our data contributes to the completion of the paleoenvironmental scenario for the Early to Mid-Holocene based on evidence that is consistent with other paleoclimatic reconstructions from the Babícora area.
Orbitolina-bearing beds in Albian Mal Paso Formation, Chumbítaro, Michoacán, SW Mexico
Authors: Omaña Lourdes , Pantoja Alorb Jerjes , Alencastera Gloria
Published: November 2024

The Mal Paso Formation crops out in the Chumbítaro region in the state of Michoacán. It comprises a lower and an upper member.The upper member is a calcareous deposit with Orbitolina-bearing beds containing an abundant foraminiferal association, mostly com-posed of Mesorbitolina texana (Roemer, 1849), Nezzazata isabellae Arnaud-Vanneau and Sliter 1995, Arenobulimina cf. A. chapmaniCushman, 1936, Glomospira sp. and Istriloculina sp.; moreover corals and echinoids are also present. Based on the stratigraphicrange of the species Mesorbitolina texana, part of the formation is assigned an early Albian age. The orbitolinid larger foraminiferaare excellent age markers for correlation of lower and mid-Cretaceous platforms. The wackestone–packstone textured limestone andthe larger benthic assemblage suggest a shallow-water platform deposit. M. texana is regarded as a cosmopolitan Tethysian species.
Datos y registros bibliográficos de las cucarachas fósiles de México (Dictyoptera: Blattodea sensu lato)
Authors: Estrada-Álvareza Julio César
Published: November 2024

Se presentan los registros fósiles de las cucarachas mexicanas, basados en una revisión bibliográfica; ampliando la información suministrada en el trabajo: Primera lista de las cucarachas (Insecta: Blattaria) de México de Estrada-Álvarez (2013), esta compilación es una propuesta para mejorar el conocimiento de los registros fósiles del grupo, siendo una base sólida para los futuros trabajos de cucarachas fósiles de México.
Agathoxylon sp. del Jurásico Inferior, Rosario Nuevo, Oaxaca, México
Authors: Ortega Chavez Elizabeth , Velasco-de León María Patricia , Rentería Jiménez Jorge
Published: November 2024

Los registros de maderas fósiles para el Jurásico son escasos para el territorio mexicano y aún más para el sur de México, una ex-cepción es la localidad de Rosario Nuevo donde afloran las formaciones Rosario y Cuarcitica Cualac, las cuales presentan numerosos fósiles, así como fragmentos de troncos de maderas de hasta 8 metros de largo. En este trabajo se describe una madera carbonizada del Jurásico Inferior que se caracteriza por presentar traqueidas de contorno circular, punteaduras de tipo araucarioide desordenadas en los campos de cruzamiento y punteaduras radiales de forma circular alternas, que se disponen principalmente de forma biseriada y contigua, raramente uniseriadas. Las características anteriores permiten asignar al género Agathoxylon.
Rusophycus y Cruziana, galerías y rastros de trilobites del Terreneuviano (Cámbrico inferior) de la Formación Puerto Blanco, Noroeste de Sonora, México. Implicaciones paleoambientales
Authors: Hernández-Barbosa Alina Marcela , Sour-Tovar Francisco
Published: November 2024

Se describen cinco galerías asignadas al icnogénero Rusophycus y un rastro que se asigna a Cruziana. El material se encontró en la unidad 4 de la Formación Puerto Blanco, Cámbrico inferior (Terreneuviano) de la región de Caborca-Pitiquito, en el noroeste de Sonora; entre las galerías se reconoce la presencia de Rusophycus marginatus. Se atribuye el origen de los icnofósiles descritos a actividades de descanso y desplazamiento de trilobites. La asociación caracteriza una icnofacies Cruziana que se desarrolló en un paleoambiente con cambios de condiciones de meso a infralitorales.
Nuevo registro de los caballos del Pleistoceno Equus conversidens y E. mexicanus en San Luis Potosí, México
Authors: Marín-Leyva Alejandro Hiram , Pérez-Crespo Víctor Adrián , Torres-Hernándezc José Ramón
Published: November 2024

Usando diversos elementos óseos, se reporta la presencia de dos especies de caballo del Pleistoceno en la Presita Blanca, San Luis Potosí. Un molar inferior M-2 fue asignado a Equus mexicanus, mientras que una 1ª falange del dedo central o derecho un premolar superior 3-4 derecho y un molar superior 1-2 derecho fueron determinados como E. conversidens. La presencia de ambas especies en esta localidad incrementa el número de localidades potosinas donde ambos taxa se han hallado juntos. Su coexistencia en la Presita Blanca se explica por las variaciones en la dieta y hábitat que presentaban ambas especies.
New findings of Late Jurassic charophyte gyrogonites and gastropods from the San Juan Formation, NW Oaxaca, Mexico
Authors: Omaña Lourdes , Ferrusquia-Villafranca Ismael , Ruiz-González José E.
Published: November 2024

Se  recogieron  muestras  de  caliza  de  la  Formación  San  Juan,  que  consiste  en  una  mezcla  de  depósitos  marinos  y  no  marinos  situados en la Cuenca de Tlaxiaco, Oaxaca, México. Estos depósitos contienen a un conjunto de agua dulce compuesto por girogonitos de carofitas y gasterópodos y otro de rocas marinas de aguas poco profundas con macroforaminíferos como Labyrinthina mirabilis Weynschenk, 1951, Everticyclammina sp., cianobacterias de tipo Rivulariacea y Cladocoropsis mirabilis Felix, 1907. Se ha asignado una edad de Oxfordiano–Kimmeridgiano basada en rango estratigráfico del macroforaminífero Labyrinthina mirabilis. La textura de tipo “mudstone” de la caliza y la asociación fósil con las carofitas y gasterópodos sugiere un ambiente continental de agua dulce. Las texturas grainstone-packstone sugieren un medio marino de aguas poco profundas con el macroforaminífero Labyrinthina mirabilis, Everticyclammina sp., cianobacterias de tipo Rivulariacea y Cladocoropsis mirabilis.
Systematic review of brazilian Nautiloidea cephalopods
Authors: De Araújo Tavora Vladimir , Monteiro Débora Barroso , Gomes Iolanda Clara do Carmo
Published: November 2024

This work deals with the systematic study of the nautiloid cephalopods from Brazil recorded in Manacapuru, Ponta Grossa, Maria Farinha and Pirabas formations (Silurian-Devonian, Devonian, Paleocene and Lower Miocene, respectively) at Pará, Paraná and Pernambuco states. Herein are presented the Paleozoic species Michelinoceras cf. M. telamon (Hall, 1879), M. sp.A, M. sp.B and the first record of Trematoceras exile (Hall, 1861) and Spyroceras crotalum (Hall, 1861). For Cenozoic taxa was confirmed Nautilus pernambucensis (Maury, 1930), Hercoglossa lamegoi Oliveira, 1953 and Aturia ackermanii Oliveira, 1958 were considered synonymous of Hercoglossa harrisi Miller and Thompson, 1936 and Aturia cubanesis (Lea, 1841) respectively
Adiciones a la mastofauna local Santa Cruz Nuevo, Pleistoceno Tardío de Puebla, México
Authors: Jarquin-Abundiz Edwing , Ferrusquía-Villafranca Ismael , Ruiz-González José E.
Published: November 2024

Con el objetivo de complementar y mejorar el entendimiento de la vertebradofauna pleistocénica mexicana, el presente estudio incluye nuevos reportes sobre la composición taxonómica de la siguiente localidad Rancholabreana: fauna local Santa Cruz Nuevo, Puebla. Los siguientes taxones son reportados por primera vez para el área de estudio: cf. Stockoceros sp., Tetrameryx sp., Glyptotherium aff. G. cylindricum y Cuvieronius aff. C. hyodon. Además, se describe nuevo material fósil perteneciente a Cervidae, Equus cf. E. conversidens y Sylvilagus sp. Con base en esta información, la fauna local Santa Cruz Nuevo está conformada por 14 órdenes, 30 familias, 36 géneros y 19 especies, referibles a las Clases Amphibia, Reptilia, Aves y Mammalia.
Paleogene ostreoids (Bivalvia, Gryphaeidae, Ostreidae) from Northeast Iran
Authors: Majidifard Mahmoud Reza , Taherpour-Khalil-Abad Morteza , Omidbakhsh Naeimeh , Taheri Jafar , Vega Francisco J.
Published: November 2024

Three species of Paleogene ostreoids are reported for first time from the Chehel Kaman Formation Formation of North Iran. Although there are numerous specimens of ostreoids, only a few are preserved sufficiently well to enable a specific identification. The species include Pycnodonte brongniarti (Bronn, 1831), Pycnodonte pharaonum (Oppenheim, 1903) and Turkostrea multicostata (Deshayes, 1832), all of them previously reported from Paleogene deposits of Europe.
Restos mandibulares de un cocodrilo marino (Thalattosuchia, Metriorhynchidae) del Llano Yosobé, en Tlaxiaco, Oaxaca, México
Authors: Barrientos-Lara Jair Israel , Alvarado-Ortega Jesús
Published: November 2024

La familia Metriorhynchidae (Crocodylomorpha) agrupa a cocodrilos marinos altamente especializados, habitantes permanentes de mar abierto y depredadores exitosos en los mares tropicales del Jurásico. Los metriorrínquidos cuentan con un amplio registro fósil en Europa y América del Sur mientras que en América del Norte sus restos son muy escasos con un par de especies descritas en el Norte y centro de México. Otros ejemplares de metriorrínquidos de afinidad incierta se han encontrado en Cuba. En este trabajo se presenta un nuevo ejemplar de metriorrínquido del Jurásico de la Formación Sabinal (Kimmeridgiano), identificado como un Metriorhynchinae indeterminado con base en algunos rasgos dentales. Este ejemplar se suma a la diversidad y alta riqueza de ejemplares que ofrece la localidad del Jurásico Superior conocida como Llano Yosobé al sur de México.
Ptychagnostus atavus (Tullberg, 1880) (Trilobita: Agnostida) del Cámbrico medio (Miaolingiano-Drumiano) de Arivechi, Sonora, México: significado bioestratigráfico
Authors: Cuen-Romero Francisco Javier , Beresi Matilde Sylvia , Palafox Reyes Juan José , Montijo González Alejandra
Published: November 2024

En la región de Arivechi, estado de Sonora, aflora una secuencia sedimentaria del Paleozoico inferior (Cámbrico), representada por las formaciones La Sata, El Mogallón, La Huerta y Milpillas, con una litología predominante de caliza, caliza arcillosa y lutita. Esta secuencia está caracterizada por una abundante y diversa biota fósil, la cual consiste en algas oncolíticas, icnofósiles, esponjas, braquiópodos y trilobites. En este trabajo se describe e ilustra por primera vez para México, la especie Ptychagnostus atavus, trilobite agnóstido colectado en capas del Drumiano (Cámbrico-Miaolingiano) de la Formación El Mogallón. Las rocas cámbricas de la región de Arivechi, se depositaron como parte de una potente secuencia de sedimentos del margen occidental del cratón de Laurentia, asociadas a un ambiente de plataforma exterior. La distribución cosmopolita de esta especie sugiere la existencia de una amplia provincia faunística, que comprende localidades de Europa (Suecia), Asia (Corea), Canadá (Columbia Británica), Estados Unidos de América (California, Nevada, Utah), México (Sonora) y Argentina (Precordillera Argentina). Su amplia distribución confirma su utilidad relevante como índice estratigráfico y de correlación global para el Cámbrico medio.
Paleontological Collection of the Facultad de Ingeniería of the Universidad Nacional Autónoma de México
Authors: Buitrón Sánchez Blanca Estela , Cuadros Mendoza Iván Manuel , Campos Madrigal Emiliano , Suárez Noyola María Elena
Published: November 2024

The Paleontological Collection of the Facultad de Ingeniería of the Universidad Nacional Autónoma de México has 6,347 fossil samples of plants, protists, invertebrates, and vertebrates. Additionally, there are 348 recent samples with the aim to make comparisons between the living world and the geological past. The main purpose of this collection is to support the courses of General Paleontology, Stratigraphy, Paleontology, Micropaleontology, Stratigraphy, and Historical Geology for the Geological Engineer major. The collection is organized by phyla and each sample has a card with systematic, stratigraphic and geographic information. The invertebrate fossils are the most abundant and come from different regions of Mexico such as Baja California, Sonora, Chihuahua, Tamaulipas, Veracruz, Coahuila, Durango, Sinaloa, San Luis Potosí, Querétaro, Estado de México, Puebla, Oaxaca, Hidalgo, Guerrero, and Chiapas. It also has material from Canada, the United States of America, Cuba, England, France, Germany, Italy, Belgium, Sweden, Switzerland, India, Russia, and Australia.