bluuebunny/crossref_metadata_2025_split huggingface dataset:
Upper Devonian conodonts from the Timan-Pechora region, Russia, and correlation with a Frasnian composite standard
Authors: Klapper Gilbert , Kuz'Min Alexei V. , Ovnatanova Nonna S. 
Published: August 2016

A Frasnian composite standard provides a refined scaling for the thirteen-fold conodont zonation first developed in the Montagne Noire, France, but since replicated in North America, Australia, and now the Timan-Pechora region of Russia. Zones 4–13 are identifiable in seven cores from the Ukhta area of southern Timan and a core from the Bagan Field of the Khoreyver Basin. Scaling of the zones through graphic correlation demonstrates the diachronism in different sections of the bases of many conodont species, including those of zonally definingPalmatolepis.This can be effectively shown in a correlation diagram scaled to a composite standard based on graphic correlation, whereas it is obscured by the assumption of synchronism inherent in conventional zonal correlation charts.Newly described species occurring in the Timan-Pechora region and elsewhere areOzarkodina nonaginta, Ancyrognathus amplicavus, Mesotaxis johnsoni, Palmatolepis amplificata, P. mucronata, P. ormistoni, andP. timanensis.A number of other species described earlier from the region also occur outside Russia, mainly in Canada and Australia. Distribution patterns in the composite standard indicate close faunal connections between the Timan-Pechora, western Canada, and Western Australia.
Bivalves and gastropods from the Middle Campanian Anacacho Limestone, south central Texas
Authors: Elder William P. 
Published: August 2016

The Anacacho Limestone was deposited during the Campanian and represents two depositional intervals, one of early Campanian and one of middle Campanian age. These two intervals correspond to periods of major eustatic sea level rise. This study focuses on the molluscan paleontology of the middle Campanian interval in the eastern part of the Anacacho exposure belt in Medina County, Texas. Molluscan assemblages in this area are indicative of inner to mid-shelf environments. No significant reef components are present. These eastern Anacacho deposits are interpreted to represent more offshore, deeper water environments than those to the southwest, where reef and lagoonal deposits have been reported.Analysis of the macrofossil components from these eastern localities has expanded the number of invertebrate species known from the Anacacho Limestone by nearly three-fold. This increase in diversity, based on a small amount of new work, suggests that many more taxa are yet to be identified, particularly in the western part of the exposure belt in Uvalde and Kinney Counties. This paper documents the bivalve and gastropod fauna, discussing and illustrating 24 bivalve taxa and 11 gastropod species. Two new bivalve species are named,Panopea anacachoensisnew species andSpondylus siccusnew species, and two potentially new gastropod species are identified but not named herein due to inadequate material. This paper expands the distribution of many eastern Gulf Coast and Atlantic Coast taxa westward into Texas and shows strong ties between the Anacacho fauna and that of the Campanian Tar Heel and Bladen Formations of the Black Creek Group in North Carolina. The taxonomic ties between these two areas probably reflect the thorough documentation of the North Carolina fauna, which is the best documented Campanian bivalve fauna in the Gulf or Atlantic Coast regions.
Ostracodes from the Maxville Limestone (Mississippian, Chesterian) from Ohio
Authors: Hoare R. D. 
Published: August 2016

A diverse fauna of ostracodes comprising 21 species representing 20 genera are described from the Maxville Limestone in central Ohio. Eight new species are proposed—Roundyella incompta, Deloia spinula, Lokius morsei, Bairdia prolixa, Acratia prolata, Waylandella depresssa, Pseudobythocypris securis, and Paracavellina cooperi.Oliganisus secunda (Croneis and Bristol), Glyptopleura costata (McCoy), and Geffenina praelonga Cooper are represented by tecnomorphs and heteromorphs. Specimens of Sansabella bradfieldi Coryell and Sohn show reversal of valve overlap.The ostracode fauna indicates a Chesterian age for the Maxville Limestone.
Evolution in Yoderimyinae (Eomyidae: Rodentia), with new material from the White River Formation (Chadronian) at Flagstaff Rim, Wyoming
Authors: Emry Robert J. , Korth William W. 
Published: August 2016

Three species of Yoderimyinae (Eomyidae: Rodentia) are recognized from the lower part of the White River Formation (early to medial Chadronian) in the Flagstaff Rim area, Wyoming. The new material allows an improved diagnosis for the subfamily. The enamel microstructure of Yoderimyinae supports its inclusion in the Eomyidae.A new genus, Zemiodontomys, is established for Yoderimys burkei Black, and new material, including upper dentition, is referred to this species. This genus differs from Yoderimys in having higher crowned and more lophodont teeth and in lacking P3. A second new genus, Litoyoderimys, is established for Yoderimys lustrorum Wood, and a new species, L. auogoleus, is referred to the genus. This genus has lower crowned, more cuspate teeth than Yoderimys.Through early and medial Chadronian time, evolution in yoderimyines includes the following morphologic transformations: increase in size; increase in crown height and lophodonty of cheek teeth; reduction of P3 (from double-rooted, to single-rooted, to absent); increase in relative size of P4 and p4; and increased longitudinal torsion of the mandible.
Stratigraphic distributions of genera and species of Neogene to Recent Caribbean reef corals
Authors: Budd Ann F. , Stemann Thomas A. , Johnson Kenneth G. 
Published: August 2016

To document evolutionary patterns in late Cenozoic Caribbean reef corals, we compiled composite stratigraphic ranges of 49 genera and 175 species using Neogene occurrences in the Cibao Valley sequence of the northern Dominican Republic and faunal lists for 24 Miocene to Recent sites across the Caribbean region. This new compilation benefits in particular from increased sampling at late Miocene to early Pleistocene sites and from increased resolution and greater taxonomic consistency provided by the use of morphometric procedures in species recognition.Preliminary examination and quantitative analysis of origination and extinction patterns suggest that a major episode of turnover took place between 4 and 1 Ma during Plio-Pleistocene time. During the episode, extinctions were approximately simultaneous in species of all reef-building families, except the Mussidae. Most strongly affected were the Pocilloporidae (Stylophora and Pocillopora), Agariciidae (Pavona and Gardineroseris), and free-living members of the Faviidae and Meandrinidae. At the genus level, mono- and paucispecific as well as more speciose genera became regionally extinct. Many of the extinct genera live today in the Indo-Pacific region, and some are important components of modern eastern Pacific reefs. Global extinctions were concentrated in free-living genera. During the turnover episode, no new genera or higher taxa arose. Instead, new species originated within the surviving Caribbean genera at approximately the same time as the extinctions, including many dominant modern Caribbean reef-building corals (e.g., Acropora palmata and the Montastraea annularis complex).Excluding this episode, the taxonomic composition of the Caribbean reef-coral fauna remained relatively unchanged during the Neogene. Minor exceptions include: 1) high originations in the Agariciidae and free-living corals during late Miocene time; and 2) regional or global extinctions of several important Oligocene Caribbean reef builders during early to middle Miocene time.
Planktic foraminiferal biostratigraphy and87Sr/86Sr isotopic stratigraphy of the Oligocene-to-Pleistocene sedimentary sequence in the southeastern Calabrian microplate, southern Italy
Authors: Patterson R. Timothy , Blenkinsop John , Cavazza William 
Published: August 2016

Integration of foraminiferal biostratigraphy,87Sr/86Sr isotope stratigraphy, and traditional physical stratigraphy has provided a refined age control of a poorly known Oligocene-to-Pleistocene sedimentary sequence nonconformably covering the crystalline basement complex of the Calabrian microplate, a continental block which rifted off the southern margin of the European plate during Neogene time. In spite of the fossil-poor content of the sequence, the simultaneous use of paleontological and geochemical techniques have resulted in the following conclusions. 1) The age of an unnamed, thin calcarenite unit locally present at the base of the sequence, previously considered Rupelian to early Aquitanian in age, has been refined to Chattian (27.8–24.8 Ma). This calcarenite was considered a basal, conformable member of the overlying Stilo-Capo d'Orlando Formation. However, this study indicates that it is separated from the Stilo-Capo d'Orlando Formation either by an angular unconformity or by a disconformity representing a significant time interval. 2) The Stilo-Capo d'Orlando Formation has a latest Chattian–earliest Aquitanian to Burdigalian age. Previously published reports suggested deposition over a much longer time span, ranging from late Rupelian to Langhian. 3) An unnamed deep-marine siliciclastic unit mostly composed of conglomerate and sandstone and previously considered Tortonian in age is, in fact, Serravallian to Tortonian. 4) The depositional interval of the “trubi,” fine-grained marine deposits, has been independently confirmed to span the Pliocene-Pleistocene.The results of this study provide a framework for future sequence–stratigraphic and paleotectonic studies in the area, and prove the effectiveness of an integrated paleontological and geochemical (87Sr/86Sr) approach in the study of fossil-poor sedimentary sequences.
Invertebrate ichnology of the nonmarine Lepreau Formation (Triassic), southern New Brunswick, eastern Canada
Authors: MacNaughton Robert B. , Pickerill Ron K. 
Published: August 2016

Alluvial fan and braided fluvial redbeds of the Triassic Lepreau Formation of southern New Brunswick, eastern Canada, contain a moderately diverse and abundant invertebrate ichnofauna. Fourteen formal ichnotaxa are recognized:Ancorichnus coronus, Ancorichnuscf.A. ancorichnus, Aulichnitesisp.,Cruziana problematica, Fuersichnusisp.,Gordia marina, Palaeophycus striatus, Palaeophycusisp.,Planolitesisp.,Rusophycusisp.,Skolithos linearis, cf.Skolithosisp., andTaenidiumisp. Two vernacular ichnotaxa, “inclined meniscate burrows” and “surface pit structures,” also occur. All these ichnotaxa are figured and briefly described. Collectively, the entire assemblage can confidently be assigned to theScoyeniaichnofacies that, in the Lepreau Formation, represents a fluvial channel ichnocoenose.Specimens have been subject to marked taphonomic effects due to weathering and preservation in lithologies showing either insufficient variation in grain size or a grain size too coarse to preserve subtle morphological variations; as a consequence, ichno-taxobases are commonly obscured or obliterated. This may have influenced the apparent diversity of the assemblage, especially with regard to meniscate and simple horizontal burrows. It is proposed that application of “taphoseries,” theoretical series including ichnotaxa that may potentially be mistaken for each other with increasing taphonomic overprint, provides a safeguard against ichnotaxonomic misidentifications.
Palynology and paleoenvironments of a Pliocene carbonate platform: the Clino core, Bahamas
Authors: Head Martin J. , Westphal Hildegard 
Published: August 2016

Neritic dinoflagellates from periplatform (slope) carbonates of the Clino borehole, located on the western, leeward margin of the Great Bahama Bank, record environmental fluctuations on the platform top. A lower Pliocene interval (3.6–4.2 Ma) contains platform-top sediments shed onto the lower slope when the platform was open and ramplike. Despite this open topography, abundantPolysphaeridium zoharyiindicate the presence of restricted marine environments on the platform top. Terrestrial palynomorphs are rare throughout this interval and imply a mostly or fully submergent platform top.By late Pliocene times (about 2.1–2.3 Ma) the platform had become flat-topped and steep-sided, with the Clino site located on its upper slope. Samples characteristic of sea-level highstands and lowstands were selected for analysis.Polysphaeridium zoharyiis abundant only in lowstand samples and may have thrived in proximity to terrestrial vegetation. In highstand samplesLingulodinium machaerophorumreplacesP. zoharyi, perhaps in response to less restricted marine environments on the platform top. This change in assemblages, along with apparent variations in cyst influx, reflects a fluctuating history of currents and salinities over the platform top in the late Pliocene. Upper Pliocene lowstand samples contain anomalously high proportions of terrestrial palynomorphs, allowing the identification of two phases of emergence and vegetation of the platform top. Palynology therefore appears to be a sensitive indicator of short-term (4th-order) sea-level change on carbonate platforms.Dinoflagellate concentrations correlate positively with carbonate compaction, and infer that compacted layers have undergone dissolution of their metastable constituents. Dinoflagellate concentrations therefore can be useful in the often difficult task of assessing compaction and dissolution in fine-grained limestones where other indicators are absent.The following dinoflagellate species are formally proposed:Operculodinium bahamenseHead new species,Operculodinium?megagranumHead new species, andSpiniferites rhizophorusHead new species.
Ontogenies of some Ordovician Telephinidae from Argentina, and larval patterns in the Proetida (Trilobita)
Authors: Chatterton Brian D. E. , Edgecombe Gregory D. , Vaccari Norberto E. , Waisfeld Beatriz G. 
Published: August 2016

The ontogenies of three new species of Telephinidae,Telephina calandria, Telephina chingolo, andTelephina problematicaare described from Arenig-Caradoc strata in the Argentine Precordillera, and compared with the larval stages of some other Proetida, including other telephinids.New findings reveal 1) a radical metamorphosis in the ontogenies of theseTelephinaspecies late in the meraspid period, not previously described among Trilobita; and 2) distinctive hypostomes of Telephinidae containing long, thin anterolaterally and dorsally splayed anterior wings. Early ontogenies of different species currently assigned to the genusTelephinafall into at least two distinct morphological and life history groups, and hypostomes (if correctly assigned in previous works) vary significantly. The three new species strengthen the hypothesis of a phylogenetic connection betweenOopsitesandTelephina.Three morphological types of protaspid instars are described for proetide trilobites. Two are anaprotaspides, and the third is a metaprotaspis. They always occur in the same sequence in the ontogeny, but no cases are known of all three types in the same species. These larval types are important for understanding the systematics and life cycles of the Proetida. Benthic/pelagic transitions identify four life history patterns among the the Proetida. The best larval synapomorphy for the Proetida is the distinctive metaprotaspid larval type, which is absent in very few proetides (some Telephinidae), perhaps as a result of heterochronic displacement of this stage into the meraspid period.
Silurian (Llandovery/Wenlock) foraminiferida in carbonate environments of southeastern Wisconsin
Authors: Watkins Rodney , Walsh Kathleen A. , Kuglitsch Jeffrey J. 
Published: August 2016

This note presents the first stratigraphic, paleoenvironmental, and systematic account of Silurian foraminifers in Wisconsin, which include nine previously described species of Ammodiscus, Glomospirella, Hemisphaerammina, Hyperammina, Lagenammina, Psammosphaera, Stomasphaera, Thurammina, and Webbinelloidea (Appendix 1). Early Silurian carbonates in this area (Fig. 1) were deposited in shelf and ramp environments in the western part of the Michigan Basin (Harris et al., 1998), and the foraminifers are associated with macrofaunal communities that represent Benthic Assemblages BA3 to BA5 of Brett et al. (1993).Silicified agglutinated foraminifers were obtained from acidinsoluble residues processed for conodonts, sponge spicules, and macrofauna (Watkins et al., 1994; Kuglitsch, 1996; Watkins and Kuglitsch, 1997; Watkins and Coorough 1997a, 1997b). Silicification of the specimens, rather than a composition of agglutinated siliceous grains, is indicated by lack of detrital silica in enclosing dolostones, variable detail of preservation, and association with other silicified fossils.
Wolfcampian brachiopods from the Bird Spring Group, Wamp Spring area, Las Vegas Range, Clark County, Nevada
Authors: Mills Patrick C. , Langenheim R. L. 
Published: August 2016

The Wamp Spring section of the Bird Spring Group consists of approximately 1,600 feet of carbonate rocks subdivided into a basal platy limestone member, lower cliff-forming member, and upper cliff-forming member.Triticites, Schwagerina, andSchubertella kingiin the platy limestone member indicate an early Wolfcampian age.Schwagerina, Schubertella kingi, and a distinctive assemblage of brachiopods, similar to the West Texas fauna, includingKozlowskia kingi, Elliottellaaff.E. multicostata, Leurosina sinesulca, Gypospirifercf.G. infraplicus, andCompositacf.C. apheles, indicate that the upper cliff-forming member is late Wolfcampian. The lower cliff-forming member is tentatively assigned to the middle Wolfcampian. The Wamp Spring sequence correlates temporally with the BSe “formation” of the Bird Spring Group.In addition to the previously mentioned taxa, the fossil-rich upper cliff-forming limestone member includes the new speciesPontisia boodi, Crurithyris wampensis, andCalliprotonia(?) n. sp. A, as well asHustedia culcitula, Crenispirifer(?) sp.,Cenorhynchia(?) sp.,Kutorginella(?) sp., marginiferids, lyssacine hexactinellid sponges, pleurotomarid and bellerophontid gastropods, cidaroid echinoids, rugose corals, cylindrical cryptostome bryozoans, and nuculids.
The paleoecology of a Late Ordovician shale unit from southwest Ohio and southeastern Indiana
Authors: Frey Robert C. 
Published: August 2016

The Treptoceras duseri shale unit within the Waynesville Formation of Late Ordovician (early Richmondian) age in southwest Ohio and the equivalent Trilobite shale unit in the same formation exposed in adjacent portions of Indiana represent an Ordovician shallow marine mud-bottom epeiric sea facies. These fine-grained elastics contain a moderately diverse mollusk-trilobite assemblage dominated by vagrant epifaunal detritus-feeding calymenid and asaphid trilobites, large endobyssate and infaunal filter-feeding pelecypods, and nektonic nautiloids. Articulate brachiopods, ectoprocts, and pelmatozoan echinoderms form only minor elements of this fauna.This mollusk-trilobite assemblage was common in Late Ordovician shallow marine clastic environments where mobility was an asset and there was an abundance of oxygen and food resources. Such assemblages are characteristic of the Lorraine Fauna of Late Ordovician (Edenian to Richmondian) age that occurs from the Ohio Valley north and east into New York, Ontario, Quebec, and Ireland. These early Paleozoic mud-bottom assemblages were considerably modified by the Late Ordovician extinction event and were replaced in the Silurian and Devonian by distinctly different assemblages dominated by large epifaunal strophomenid and spiriferid brachiopods, crinoids, and phacopid trilobites.
A pre-trilobite shelly fauna from the White–Inyo region of eastern California and western Nevada
Authors: Signor Philip W. , Mount Jeffrey F. , Onken Beth R. 
Published: August 2016

A low-diversity shelly fauna occurs in the Deep Spring Formation of the White–Inyo Mountains of eastern California and in Esmeralda County, Nevada. Although poorly preserved, specimens can be recovered through acid digestion of the limestone matrix. The fauna is composed of three tubes of uncertain affinities and a hyolith.Nevadatubulus dunfeein. gen. and sp., a distinctive, randomly curved and annulated tube, is abundant and far outnumbers the remaining three elements:Coleoloides inyoensisn. sp.,Sinotubulites cienegensisMcMenamin, and the hyolith Salanytheca sp. The original composition of the faunal elements appears to have been calcite or aragonite, but recrystallization has destroyed any ultrastructure. No phosphatic elements occur with the fauna nor have phosphatic fossils been recovered from the underlying Wyman and Reed Formations or the other members of the Deep Spring Formation.The fauna occurs 1,500 meters below the first trilobite body fossils and may be coeval with faunas from the basal Cambrian Tommotian Stage of the Siberian Platform.Wyattia, the only previously described pre-trilobite shelly fossil from the region, occurs in approximately the same stratigraphic interval but was not recovered in our samples.
A revision ofTaeniolabis(Mammalia: Multituberculata), with a new species from the Puercan of eastern Montana
Authors: Simmons Nancy B. 
Published: August 2016

The largest known member of the mammalian order Multituberculata is the taeniolabididTaeniolabis, which is known from Puercan (early Paleocene) localities in northern New Mexico, Utah, Montana, and southern Saskatchewan. A locality in the Ludlow Formation of southeastern Montana has produced remains of a new species,T. lambertin. sp., which is based on a well-preserved dentary with teeth. Isolated teeth from the Tullock Formation of northeastern Montana are referred toT. lambertin. sp. andTaeniolabissp.Taeniolabis triserialis, known exclusively from the San Juan Basin, New Mexico, is shown to be a junior synonym ofT. taoensis. Taeniolabis sulcatus, the type species of the genus, is recognized as a nomen dubium and is synonymized withT. taoensisbased on general morphology and occurrence in the same stratigraphic unit and collecting area (lower part of the Nacimiento Formation, San Juan Basin, New Mexico). The nameT. taoensisis retained for this taxon in the interest of nomenclatorial stability. These synonymies limit to one the number of species ofTaeniolabisrecognized in the San Juan Basin, New Mexico. It is proposed thatT. taoensisbe designated the new type species of the genusTaeniolabis.