cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Agrostis
Creators: name: Cho, Yanghoon
name: Kim, Jonghwan
name: Han, Jeong Eun
name: Lee, Byoungyoon
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Poales
Poaceae
Agrostis

description: A Key to Agrostis in Korea
1. Palea well-developed, more than 1/3 lemma length
2. Plant stoloniferous, rhizome absesnt ........................ ...................................... A. stolonifera (jnjdḍğ)
2. Plant turfed or rhizomatous, stolon absent
3. Panicle branches almost smooth ............................. .......................................... A. capillaris (ṻdḍğ)
3. Panicle branches scabrid
4. Panicle green or violet tinged ............................... ....................................... A. gigantean (fidḍğ)
4. Panicle dark purple tinged brown ......................... ........................... A. divaricatissima (ŝḑdḍğ)
1. Palea small, 1/3 length of lemma or less
5. Lemma awnless, included within the spikelet .......... ................................................... A. clavata (dḍğ)
5. Lemma awned, exerted from spikelet
6. Plant with creeping surface stolons ........................ ........................................... A. canina (äêdḍğ)
6. Plant with subterranean rhizomes or turfed............. ......................................... A. flaccida (äḏdḍğ)
description: Published as part of Cho, Yanghoon, Kim, Jonghwan, Han, Jeong Eun & Lee, Byoungyoon, 2016, Vascular plants of Poaceae (Ⅰ) new to Korea: Vulpia bromoides (L.) Gray, Agrostis capillaris L. and Eragrostis pectinacea (Michx.) Nees, pp. 14-21 in Journal of Species Research 5 (1) on page 18, DOI: 10.12651/JSR.2016.5.1.014, http://zenodo.org/record/8120366
Rhynchotalona kistarae Roen 1973
Creators: name: Sinev, Artem Y.
name: Kotov, Alexey A.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Branchiopoda
Diplostraca
Rhynchotalona
Rhynchotalona kistarae

description: Rhynchotalona kistarae Roen, 1973.
Røen, 1973: 89–91, figs 1–4.
Material. Description based on published information.
Diagnosis. Female. Rhynchotalona species of small size; length 0.23–0.32 mm. Ventral margin of valves with posterior group of setae of moderate length. Rostrum about 2 times longer than antennule, evenly curved. Major head pore as elongated rimmed field, length about 3 width. Postabdomen with almost parallel margins, with three large denticles, unlike in other species, basalmost large denticle located almost at postanal angle of postabdomen.
Male unknown.
Size: length 0.23–0.32 mm, height 0.12–0.21 mm.
Distribution. Greenland.
description: Published as part of Sinev, Artem Y. & Kotov, Alexey A., 2014, Revision of the Holarctic genus Rhynchotalona Norman, 1903 (Anomopoda: Chydoridae), pp. 188-210 in Zootaxa 3841 (2) on page 206, DOI: 10.11646/zootaxa.3841.2.2, http://zenodo.org/record/229101
Laccobius (Microlaccobius) fragilis Nakane 1966
Creators: name: Liu, Hsing-Che
name: Fikáček, Martin
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Hydrophilidae
Laccobius
Laccobius fragilis

description: Laccobius (Microlaccobius) fragilis Nakane, 1966 Ḏ弱flǿ牙ḃ
(Fig. 18)
Laccobius (Microlaccobius) fragilis Nakane, 1966: 57.
Laccobius (Microlaccobius) fragilis: Gentili (2003: 422) (records from Taiwan).
Material examined. No specimens were examined.
Published record: Taitung (Gentili 2003).
Distribution. China (Gansu, Liaoning, Shaanxi), Japan (Honshu, Shikoku, Kyushu), Korea, Russia,? Taiwan (Gentili 2003; Nakajima et al. 2020; Przewoźny 2020).
Comments. The first and so far the only record of this species from Taiwan is a male from Taitung (southern Taiwan) mentioned by Gentili (2003). This species is very similar to L. formosus, and can be differentiated by the narrower median lobe of the aedeagus (Fig. 18). We did not find any specimens of L. fragilis in this study, although we also examined specimens from Taitung. The occurrence of L. fragilis in Taiwan hence needs to be reconfirmed. However, more species usually co-occur at localities sampled by us in Taiwan and we hence cannot exclude that L. fragilis may be rare and hence unrecorded by us. Therefore, we still maintain L. fragilis as a member of Taiwanese fauna.
description: Published as part of Liu, Hsing-Che & Fikáček, Martin, 2021, Review of the Taiwanese Laccobius Erichson, 1837 (Coleoptera: Hydrophilidae) with description of a new species, pp. 587-599 in Zootaxa 4963 (3) on page 590, DOI: 10.11646/zootaxa.4963.3.11, http://zenodo.org/record/4704278
Drosophila neosaltans Pavan e Magalhaes
Creators: name: Roman, Bruna Emilia
name: Madi-Ravazzi, Lilian
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Drosophilidae
Drosophila
Drosophila neosaltans

description: Drosophila neosaltans Pavan e Magalhães in Pavan, 1950
(Fig. 15)
Non-type material. Strains H 1 (Rio de Janeiro, Brazil): 21 males dissected; and AG (Aguaí, Santa Catarina, Brazil): 15 males dissected.
Male terminalia. Although this species belongs to the elliptica subgroup, it is the one that most differs from the others in its subgroup. The epandrium does not present the epandrial ventral processes in the ventral region; instead, this region displays two small saliences (Fig. 15C). The epandrial extensions are very similar to those of D. emarginata and D. neoelliptica (Fig.15C, D). Each surstylus has approximately 34 surstylar teeth, irregularly arranged throughout the internal region, plus 7 thinner primary teeth arranged in a row and a tuft of long surstylar bristles (Fig. 15B–D). The hypandrium is similar to D. emarginata and D. neoelliptica, elongated and thin, however, the bristles are located at the end of each side of the median gonocoxite (Fig. 15C). The aedeagus is the smallest of this subgroup and the apex does not end in a hook shape, but in a cylindrical shape, forming a groove at its end (Fig. 15A–E). The dorsal portion of the aedeagus is covered by long scales-like structures (Fig. 15A, D). As in D. neoelliptica, this species has a structure called aedeagal ventral crest, but this structure is formed by two isolated protuberances on the central and ventral axis of the aedeagus and it is covered with scales (Fig. 15A, E). The lateral postgonites are smaller and taper at the extremity (Fig. 15A, D, E). The pregonites are not fused and have a bristle at each end (Fig. 15E).
description: Published as part of Roman, Bruna Emilia & Madi-Ravazzi, Lilian, 2021, Male terminalia morphology of sixteen species of the Drosophila saltans group Sturtevant (Diptera, Drosophilidae), pp. 523-544 in Zootaxa 5061 (3) on page 538, DOI: 10.11646/zootaxa.5061.3.7, http://zenodo.org/record/5649958
Rhynchotalona
Creators: name: Sinev, Artem Y.
name: Kotov, Alexey A.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Branchiopoda
Diplostraca
Rhynchotalona

description: Key for species of the genus Rhynchotalona
1. Rostrum short, 1.5 times or less longer than antennule.............................. R. weiri sp. nov. North America.
- Rostrum long, 2–3 times longer than antennule............................................................. 2.
2. Posteriormost ventral setae of valves long, their length exceeding the height of postabdomen, posteriormost setae being longest....................................................................... R. longiseta sp. nov. North America.
- Posterior ventral setae of valves short, their length much less than the height of postabdomen........................ 3
3. Basalmost large marginal denticle of postabdomen is located almost at postanal angle. Rostrum 2 times longer than antennule. Length less than 0.35 mm ................................................... R. kistarae Røen, 1973. Greenland.
- Basalmost large marginal denticle of postabdomen is located at the middle of postanal margin. Rostrum 3 times longer than antennule. Length up to 0.6 mm ....................... R. falcata (Sars, 1862). Europe, Kazakhstan, Siberia, Mongolia.
description: Published as part of Sinev, Artem Y. & Kotov, Alexey A., 2014, Revision of the Holarctic genus Rhynchotalona Norman, 1903 (Anomopoda: Chydoridae), pp. 188-210 in Zootaxa 3841 (2) on page 206, DOI: 10.11646/zootaxa.3841.2.2, http://zenodo.org/record/229101
Longitudinal Latent Overall Toxicity (LOTox) profiles in osteosarcoma: a new taxonomy based on latent Markov models
Creators: name: Spreafico, Marta
name: Ieva, Francesca
name: Fiocco, Marta
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Due to the presence of multiple types of adverse events with different levels of severity, the analysis of longitudinal toxicity data is a difficult task in cancer studies. In this work, a novel approach based on latent Markov models and compositional data techniques is proposed. The latent status of interest is the Latent Overall Toxicity (LOTox) condition of each patient. The main objectives consist in identifying different latent states of overall toxicity burden and investigating the evolution of individual toxicity risk during cancer treatment. This methodology is applied to osteosarcoma treatment data to provide novel techniques that may support medical decisions in childhood cancer therapy.
Merodon flavitibius Paramonov 1926
Creators: name: Vujić, Ante
name: Radenković, Snežana
name: Tubić, Nataša Kočiš
name: Likov, Laura
name: Popov, Grigory
name: Rojo, Santos
name: Miličić, Marija
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Merodon
Merodon flavitibius

description: Merodon Flavitibius Paramonov, 1926
Merodon isperensis Hurkmans, 1993 (as subspecies of M. aberrans) syn. n.
“ Merodon aberrans Egg. var. flavitibius nova” Paramonow, 1926: 153.
Type locality: Armenia. Original description was based on an unknown number of syntypes, two of them were located in the Paramonov’s collection (SIZK, examined): Lectotype: male with labels: [N 317], [Инаклю (= Inaklyu, modern Antarut village, 40.35N, 44.266667E, asl 1450 m) / Эчмиадз. у. (= Echmiadzin (modern Vagharshapat) District) / Эрив. г. (= Yerevan Region, Armenia) 17.vii.24.], [Merodon aberrans Eger / var. flavitibius / var. nov. ♂ Typus / Paramonov. d.] (SIZK). Paralectotype: female with labels: [N 318], [г. Карны-Ярых (KarnyMount Yarykh, = Mount Ara, 40.4056N 44.4522E, asl 2614 m) / Эчмиадз. у. / Эрив. г. (= Yerevan Region, Armenia) 26.vii.24.], [Merodon / aberrans Egg. / var. flavitibius / var. nov. ♀ Typus / Paramonov d.] (SIZK).
Note. In the original description, only the type locality is given, namely “Patria: Armenia ”. The exact number of types is unknown, as it is not specified by the author of the species (Paramonow, 1926: 153). The types were considered lost (Liepa, 1969: 20; Hurkmans, 1993: 205). In Peck (1988: 166), taxon was given as subspecies Merodon aberrans flavitibius Paramanov (sic!), 1926, according to article 45g (II) ICZN (1985). Hurkmans (1993: 176) also left the subspecific rank for the taxon. He also erroneously indicated that Paramonov published the name with a subspecies status (ibid.). We designate here the male as the lectotype, and the female as the paralectotype.
description: Published as part of Vujić, Ante, Radenković, Snežana, Tubić, Nataša Kočiš, Likov, Laura, Popov, Grigory, Rojo, Santos & Miličić, Marija, 2023, Integrative taxonomy of the Merodon aberrans (Diptera, Syrphidae) species group: distribution patterns and description of three new species, pp. 51-96 in Contributions to Zoology 92 (1) on page 64, DOI: 10.1163/18759866-BJA10037, http://zenodo.org/record/8349804
Eragrostis
Creators: name: Cho, Yanghoon
name: Kim, Jonghwan
name: Han, Jeong Eun
name: Lee, Byoungyoon
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Poales
Poaceae
Eragrostis

description: A Key to Eragrostis in Korea
1. Florets disarticulating from above downward, falling together with the rachilla joints................................... ................................................ E. japonica (각ṄƎḍ)
1. Florets disarticulating from below upward, usually leaving the rachilla entire
2. Annual
3. Plants glandular on the culms, leaf sheaths, and panicle
4.Sp ikelets 2-3 mm broad, lower lemma 2.2-2.8 mm ...................................... E. cilianensis (ȁNjƎḍ)
4.Spikelets 1.5-2.5 mm broad, lower lemma 1.5-2 mm....................................... E. minor (ǭNjƎḍ)
3.Plants eglandular
4. Lower glume 1-veined ......................................... ...................................... E. pectinacea (ṻffiƚffl)
4. Lower glume without a vein
5. Summit of sheaths pilose; panicles 3.5-14 cm wide, axils pilose; pedicels as long or longer than the spikelets............... E. pilosa (ǖffiƚffl)
5. Summit of sheaths glabrous; panicles 1.5-3 cm wide, axils glabrous; pedicels usually shorter than the spikelets.......... E. multicaulis (ffiƚffl)
2.Perennial
6. Branchlets and pedicels distinctly or obscurely glandular ................................ E. ferruginea (Ǝḍ)
6. Branchlets and pedicels eglandular ........................ ..................................... E. curvula (ḝ÷ȁNjƎḍ)
description: Published as part of Cho, Yanghoon, Kim, Jonghwan, Han, Jeong Eun & Lee, Byoungyoon, 2016, Vascular plants of Poaceae (Ⅰ) new to Korea: Vulpia bromoides (L.) Gray, Agrostis capillaris L. and Eragrostis pectinacea (Michx.) Nees, pp. 14-21 in Journal of Species Research 5 (1) on page 20, DOI: 10.12651/JSR.2016.5.1.014, http://zenodo.org/record/8120366
Coraebosoma Obenberger 1923
Creators: name: Bellamy, C. L.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Buprestidae
Coraebosoma

description: Coraebosoma Obenberger, 1923
Coraebosoma Obenberger, 1923:198; Bellamy 1990b:198 (revision); 2003: 83.
Type species: Coraebosoma manilense Obenberger, 1923 (original designation).
Remarks. This genus was last studied by Bellamy (1990b) with eight species known from the Philippines and one from India, with one new species, C. mindoroense Ohmomo (2002) recently described. New distribution records are recorded for two species below.
description: Published as part of Bellamy, C. L., 2005, The Philippine Coraebini Bedel, 1921 (Coleoptera: Buprestidae: Agrilini) Part 6: new and resurrected genera and new species, pp. 23-40 in Zootaxa 1038 on page 38, DOI: 10.5281/zenodo.169782
Pteranabropsis tibetensis Wang, Liu et Li, sp. nov.
Creators: name: Wang, Mengmeng
name: Liu, Xianwei
name: Li, Kai
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Chorotypidae
Pteranabropsis
Pteranabropsis tibetensis

description: Pteranabropsis tibetensis Wang, Liu et Li sp. nov.
(Figs. 20–24, Plate E)
Description. Male: Body medium size. Pronotum shouldered. Prosternum with 1 pair of slender, long spines. Meso- and metasterna lobate, the lobes of metasternum triangular with apex pointed (Fig. 20). Tegmina and wings well developed. Tegmina exceeding apex of hind femur, hind wings nearly equal to tegmina. Fore coxa with 1 spine, interno-ventral margin of fore femur with 2 spines, but externo-ventral margin without spine, knee lobe with 1 spine, fore tibia with 2 internal spines and 1 external spine above, with 5 pairs of spines below, tympanal organ open. Middle femur unarmed below, middle tibia with 4 external and 3 internal spines above, with 5 pairs of spines below. Both ventral margins of hind femur with 3–4 spines, hind tibia with 9–10 spines each margin above. Hind margin of ninth abdominal tergite with 1 pair of processes, wrinkled above. Tenth abdominal tergite with 1 pair of hooks upcurved (Figs. 21–22). Epiproct roundly triangular, paraproct tapering apically, slightly exceeding hind margin of subgenital plate, with apex acute and strongly diverged. Cerci thin and long, distinctly longer than subgenital plate. Lateral margin of subgenital plate parallel in apical half, hind margin of subgenital plate truncate (Fig. 23).
Female: Body roughly similar to that of male. Subgenital plate protractedly triangular with pointed apex (Fig. 24). Ovipositor upcurved in apical half, with apex obtuse.
Coloration. Body dark grayish brown, with pale yellowish spots. Antennae dark brown, with light rings. Legs light brown, with darkish stripes, hind femur with an interrupted longitudinal blackish stripe in outer side. Fore wings brown, transparent, with dark stripes. Cerci lightish brown.
Measurements (length in mm). Body ♂ 23.0–25.0, ♀ 25.0–27.0; pronotum ♂ 5.5–6.0, ♀ 6.0 –6.5; tegmina ♂ 27.0–30.0, ♀ 24.0–26.0; hind femur ♂ 24.0–27.0, ♀ 25.0–26.0; ovipositor ♀ 16.0–18.0.
Material examined. Holotype 1 ♂, Hanmi, Xizang, Alt. 2100m, 2011. VII.23–VIII.7, leg. Bi Wen-Xuan; paratype 2 ♂♂, 10 ♀♀, same data as holotype.
Distribution. China (Xizang).
Etymology. This species named after the location of the type specimen.
Diagnosis. This new species similar to P. parallelus sp. nov., but differs from it by the hind margin of male subgenital plate without incision and ovipositor longer.
20 21 24 22 23 FIGURE E. Pteranabropsis tibetensis sp. nov. Male. Holotype. Hanmi, Xizang. Lateral view.
description: Published as part of Wang, Mengmeng, Liu, Xianwei & Li, Kai, 2015, Review of the genus Pteranabropsis Gorochov (Orthoptera: Stenopelmatoidea: Anostostomatidae: Anabropsinae) from China, pp. 529-540 in Zootaxa 3905 (4) on pages 537-538, DOI: 10.11646/zootaxa.3905.4.6, http://zenodo.org/record/243034
Theraphosidae Thorell 1869
Creators: name: Valencia-Cuéllar, Dayana
name: Perafán, Carlos
name: Guerrero, Roberto J.
name: Guadanucci, José Paulo Leite
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Theraphosidae

description: Family Theraphosidae Thorell, 1869
Subfamily Schismatothelinae Guadanucci 2014
Type-genus: Schismatothele Karsch 1879 (Guadanucci 2014)
Composition: Euthycaelus Simon 1889, Guyruita Guadanucci et al. 2007, Neoholothele Guadanucci & Weinmann 2015, Schismatothele Karsch 1879, Sickius Soares & Camargo 1948.
Diagnosis: Schismatothelinae can be distinguished the other Neotropical Theraphosidae by the combination of the following characters: absence of urticating setae, lack of stridulatory organ in the maxillae (lyra), non-dense scopulae, presence of both thickened and clavate trichobothria located on the apical lateral faces of tibiae I-IV, and numerous and dense cuspules on the labium located on a raised area.
description: Published as part of Valencia-Cuéllar, Dayana, Perafán, Carlos, Guerrero, Roberto J. & Guadanucci, José Paulo Leite, 2019, Schismatothelinae spiders (Araneae, Mygalomorphae, Theraphosidae) from Colombia: four new species and an approach to their diversity, pp. 548-562 in Zootaxa 4545 (4) on pages 550-551, DOI: 10.11646/zootaxa.4545.4.6, http://zenodo.org/record/2618325
Coraebosoma manilense Obenberger 1923
Creators: name: Bellamy, C. L.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Buprestidae
Coraebosoma
Coraebosoma manilense

description: Coraebosoma manilense Obenberger, 1923
Coraebosoma manilense Obenberger, 1923:33; Bellamy, 1990b:200.
Remarks. This species is known from the holotype (NMPC) and one additional specimen (USNM) recorded by Bellamy (1990), which had very imprecise locality information. Several recently collected specimens are worth recording: 3 examples (TTCJ, CLBC): PHILIPPINES, S. Luzon, Quezon, Mt. Banahaw, v.2002; 2 ɗɗ, 1 Ψ (CLBC): S. Luzon, Laguna, vi.2003. This record more precisely details the range of this species on Luzon.
description: Published as part of Bellamy, C. L., 2005, The Philippine Coraebini Bedel, 1921 (Coleoptera: Buprestidae: Agrilini) Part 6: new and resurrected genera and new species, pp. 23-40 in Zootaxa 1038 on page 38, DOI: 10.5281/zenodo.169782
Eumastigonus distinctior Chamberlin 1920
Creators: name: Korsós, Zoltán
name: Johns, Peter M.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplopoda
Spirostreptida
Cambalidae
Eumastigonus
Eumastigonus distinctior

description: Eumastigonus distinctior Chamberlin, 1920
Figs. 16–17, 23.
Eumastigonus distinctior Chamberlin, 1920: 164. Hoffman 1972: 202, Figs. 1-5. Mauriès 1983: 258 -259, Fig.. 23.
Types: Holotype 3 (MCZ 4872). – New Zealand, North Island, Days Bay near Wellington, leg. W. M. Wheeler 1914.
Other material studied: 23, 1Ƥ – Wellington, Porirua, 24. Dec. 1951, leg. Galathea Exp., det. Mauriès 1982 (ZMUC); and 73, 10Ƥ, according to the following new records.
New locality records: New Zealand, North Island, Wellington Region: Days Bay, 120 m, leg. P. M. Johns, 15 Jan. 1964, logs, 23, 1Ƥ (CMNZ: one male is dissected for SEM: head, 1st and 2nd legpair with penis together, gonopods). Hutt Valley, Silverstream, Keith George Park, 120 m, leg. P. M. Johns, 30 Nov. 1963, mixed broadleaf forest, under logs, 13, 4Ƥ (CMNZ). Otaki, Te Horo, 25 m, leg. P. M. Johns, 30 Nov. 1963, in Podocarpus halli forest, under logs and stones, 33, 5Ƥ (CMNZ). Wellington, Whitemans Valley, leg. F. R. Allison, 20 May 1965, in Nothofagus logs, 13 (CMNZ).
Distribution: New Zealand, North Island, Wellington Region. See Fig. 52.
Description: The species is properly redescribed and illustrated based on the paratype material (Hoffman 1972, Mauriès 1983). It is easily recognisable by the slender, bent inner coxal process (cp) of the anterior gonopod (Fig. 16). As an addition, the narrow ocellarium consists of only 6–8 ocelli in 2(3) rows, and there are 2+2 setae on the paraprocts. Body rings characteristically with dark median stripe on dorsum, composed of a series of subtriangular spots, rest of body and legs lighter.
Female vulva (Fig. 23) shows the typical Eumastigonus characters: disc-shaped, valves and operculum (op) strongly compressed, each valve with pointed tip, anterior with 9–12, posterior with only one or two setae along margin. Apodematic tube and ampulla could not be observed.
description: Published as part of Korsós, Zoltán & Johns, Peter M., 2009, Introduction to the taxonomy of Iulomorphidae of New Zealand, with descriptions of two new species of Eumastigonus Chamberlin, 1920 (Diplopoda: Spirostreptida: Epinannolenidea), pp. 1-24 in Zootaxa 2065 on pages 10-12, DOI: 10.5281/zenodo.186931
Cryptoditha elegans
Creators: name: Bedoya-Roqueme, Edwin
name: Tizo-Pedroso, Everton
name: Barbier, Eder
name: Lira, André Felipe De Araújo
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Pseudoscorpiones
Chthoniidae
Cryptoditha
Cryptoditha elegans

description: Cryptoditha aff. elegans
Material examined. 1 male, Pernambuco, Brazil: Furna do Morcego cave, 8°34’14.1”S; 37°22’55.6”W, 556 m a.s.l., 09-V-2019; Catimbau National Park, E. Barbier leg. (LECA; Ps-SCR009).
Diagnosis. According to Chamberlin & Chamberlin (1945) specimens of Cryptoditha can be recognized by the marginal teeth of chela prominent, acute, and distinctly spaced; sub-equally developed on both fingers; tending to become contiguous basally on the fingers (Chamberlin & Chamberlin 1945; Fig. 6). Carapace smooth, weakly emarginate, and provided with a dentate, epistomal process; with four large eyes. Vestitural setae sparse but robust; tergites uniseriate with about six marginal setae per segment. Coxal spines typical, with four to five each on coxae I and II, intercoxal tubercle absent. Trichobothrium et subterminal, est and it both distinctly distal of median, but well-spaced from et; trichobothrium ist, esb, and eb, forming an oblique basal series. Trichobothrium esb closer to ist than to eb. Trichobothrium st submedial between sb and t (Chamberlin & Chamberlin 1945; Fig. 6). The species Cryptoditha elegans (Beier, 1931) was described initially from Minas Gerais (Passa Quatro), subsequently from Santa Catarina (Beier 1931a, 1974), and later reported for the State of Mina Gerais (Mahnert 2001). The specimen of the cave from Pernambuco (Brazil) presents some taxonomic characters corresponding to the description of the C. elegans made by Beier (1931a) and Chamberlin & Chamberlin (1945), such as proportion of pedipalps, and distribution of trichobothria, similarly, to the proportions of the specimens reported by Mahnert (2001). Therefore, due to the lack of specimens from the type locality of the species (see Mahnert 2001), which would allow a reexamination of the type specimens, likewise, only having one individual, it is decided to assign the Pernambuco specimen as Cryptoditha aff. elegans.
Measurements (mm). Body length:1.315.Carapace:0.423.Pedipalps: femur: 0.375 / 0.149, patella: 0.186 / 0.086, chela: 0.626 / 0.127, movable finger: 0.408. Chelicera: 0.273 / 0.139, movable finger length: 0.153. Leg I: femur: 0.463 / 0.080, patella: 0.291 / 0.070, tibia: 0.261 / 0.070, tarsus: 0.452 / 0.050. Leg IV: femur+patella: 0.581 / 0.160, tibia: 0.403 / 0.080, metatarsus: 0.223 / 0.060, tarsus: 0.413 / 0.060.
Distribution. Brazil (Harvey 2013; World Pseudoscorpiones Catalog 2022).
description: Published as part of Bedoya-Roqueme, Edwin, Tizo-Pedroso, Everton, Barbier, Eder & Lira, André Felipe De Araújo, 2023, Two new cave-dwelling pseudoscorpion species (Arachnida: Pseudoscorpiones) from Northeastern Brazil, pp. 317-332 in Zootaxa 5293 (2) on pages 319-320, DOI: 10.11646/zootaxa.5293.2.6, http://zenodo.org/record/7960232
Coraebosoma samarense Bellamy 1990
Creators: name: Bellamy, C. L.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Buprestidae
Coraebosoma
Coraebosoma samarense

description: Coraebosoma samarense Bellamy, 1990
Coraebosoma samarense Bellamy, 1990b:200.
Remarks. This species is known from the holotype (NSMT) recorded by Bellamy (1990), but several new specimens are worth recording: 2 examples (TTCJ, CLBC): PHILIP­ PINES, Eastern Samar, Eastern Vizayas, iv.2002. This record increases our knowledge of the range of the species on Samar.
description: Published as part of Bellamy, C. L., 2005, The Philippine Coraebini Bedel, 1921 (Coleoptera: Buprestidae: Agrilini) Part 6: new and resurrected genera and new species, pp. 23-40 in Zootaxa 1038 on page 39, DOI: 10.5281/zenodo.169782
Euthycaelus Simon 1889
Creators: name: Guadanucci, José Paulo Leite
name: Weinmann, Dirk
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Theraphosidae
Euthycaelus

description: Euthycaelus Simon 1889
Euthycaelus Simon 1889: 200 (description of ♀; Rudloff 1997: 7 (removed from the synonymy with holothele, Contra raven, 1985:153). Platnick (2013) did not follow Rudloff’s proposal because of the lack of a detailed diagnosis.
Type-species. Euthycaelus colonicus Simon 1889, by subsequent designation by Simon 1892:128.
Species included. Euthycaelus colonicus Simon 1889, E. norae sp. nov., E. amandae sp. nov.
Diagnosis. Males and females resemble those of the genus Schismatothele, and can be recognized by palpal tibia being swollen and bearing several spines on the apical retrolateral surface; tridimensional, heavily sclerotized spermathecae. They differ from those of Schismatothele by the following features: palpal tibia with two rows of thick spines; male palpal bulb elongated, subtegulum separated from tegulum; male tibial apophysis with retrolateral branch very long; spermathecae composed of a pair of single receptacles.
Description. Carapace oval, longer than wide; moderately pilose. Cephalic region slightly raised. Eye group rectangular, anterior eye row procurved, posterior slightly recurved. Fovea deep, straight or procurved. Labium subquadrate, with ca. 100 cuspules densely concentrated on anterior half. Labiosternal junction moderately deep; sigilla oval, distinct and located near junction. Sternum rounded, with conspicuous bulge near labiosternal junction; posterior sternal sigilla oval and away from margin. Male palpal tibia swollen, with thick spines on retrolateral surface, disposed in two rows. Male tibial apophysis comprising two branches. Male metatarsus I bending externally to retrolateral branch of tibial apophysis. Scopulae on tarsi III–IV, on both sexes, divided by band of thick setae. Superior tarsal claws of males and females without teeth or with median row of small teeth; inferior tarsal claws absent. Tarsi IV cracked on males and females. Cymbium longer than wide, bilobed. Palpal bulb with short embolus, large subtegulum, separated from tegulum. Spermathecae strongly sclerotized, comprising two receptacula. Abdomen coloration uniformly brown; abdominal markings absent.
description: Published as part of Guadanucci, José Paulo Leite & Weinmann, Dirk, 2014, The spider genera Euthycaelus Simon and Schismatothele Karsch (Mygalomorphae, Theraphosidae), pp. 275-288 in Zootaxa 3795 (3) on page 276, DOI: 10.11646/zootaxa.3795.3.3, http://zenodo.org/record/227876
Laccobius Erichson 1837
Creators: name: Liu, Hsing-Che
name: Fikáček, Martin
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Hydrophilidae
Laccobius

description: Key to Taiwanese species of Laccobius
1. Eyes kidney-shaped (reniform). Antenna with 7 antennomeres (subgenus Glyptolaccobius). Legs brown. Inhabits wet rocks (Fig. 26).......................................................................... L. politus Gentili, 1979
- Eyes rounded. Antenna with 8 antennomeres (subgenus Microlaccobius). Legs pale yellowish. Inhabits sides of streams or ponds or sun-exposed algal mats (Figs. 23–25).............................................................. 2
2. Body small (1.7–2.2 mm), elongate oval. Pronotum with a small central dark oval spot which is narrower than the width of the head (Fig. 22)................................................................. L. roseiceps Régimbart, 1903
- Body larger (2.0– 2.8 mm), oval. Pronotum with much bigger dark spot, as wide as head or wider...................... 3
3. Parameres widened and membranous apically, median lobe distinctly shorter than parameres.......................... 4
- Parameres slender, bent inward in apical third, median lobe slightly shorter than parameres or as long as parameres....... 5
4. Median lobe wider, apical broadly rounded (Fig. 15)..................................... L. formosus Gentili, 1979
- Median lobe narrower, apical strongly narrowing (Fig. 18)................................. L. fragilis Nakane, 1966
5. Pronotum with a dark spot slightly wider that the head (Fig. 22). Median lobe of the aedeagus very broad, moderately narrowing apically (Fig. 3–4), Parameres very narrow in dorsal and ventral views (Fig. 5).......................... L. hoi sp. nov.
- Pronotum almost entirely dark, with pale lateral margins (Fig. 20). Median lobe of the aedeagus widening in the midlength, apex subtruncate. Parameres narrow in dorsal view (Fig. 16).............................. L. hammondi Gentili, 1984
description: Published as part of Liu, Hsing-Che & Fikáček, Martin, 2021, Review of the Taiwanese Laccobius Erichson, 1837 (Coleoptera: Hydrophilidae) with description of a new species, pp. 587-599 in Zootaxa 4963 (3) on page 596, DOI: 10.11646/zootaxa.4963.3.11, http://zenodo.org/record/4704278
Dynamical residues of Lorentzian spectral zeta functions
Creators: name: Dang, Nguyen Viet
name: Wrochna, Michał
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We define a dynamical residue which generalizes the Guillemin-Wodzicki residue density of pseudo-differential operators. More precisely, given a Schwartz kernel, the definition refers to Pollicott-Ruelle resonances for the dynamics of scaling towards the diagonal. We apply this formalism to complex powers of the wave operator and we prove that residues of Lorentzian spectral zeta functions are dynamical residues. The residues are shown to have local geometric content as expected from formal analogies with the Riemannian case.
description: v2: 43 pages, various minor improvements, new appendix on canonical trace density; to appear in J. \'Ec. polytech. Math
Eobroscus Kryzhanovskij 1951
Creators: name: Schmidt, Joachim
name: Wrase, David W.
name: Sciaky, Riccardo
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Carabidae
Eobroscus

description: Eobroscus Kryzhanovskij, 1951
Type species: Eobroscus richteri Kryzhanovskij, 1951 = Broscus lutshniki Roubal, 1928.
New synonymies
Eobroscus Kryzhanovskij, 1951 = Orobroscus Morita, 1990, syn. nov. (type species: Eobroscus masumotoi Morita, 1990).
Eobroscus bhutanensis Morvan, 1982 = Eobroscus uenoi Morita, 1995, syn. nov.
description: Published as part of Schmidt, Joachim, Wrase, David W. & Sciaky, Riccardo, 2013, Description of Kashmirobroscus gen. nov. with two new species from the Northwest Himalaya, and remarks on the East Asian genus Eobroscus Kryzhanovskij, 1951 (Coleoptera: Carabidae: Broscini), pp. 2671-2689 in Journal of Natural History (J. Nat. Hist.) (J. Nat. Hist.) 47 (41 - 42) on page 2685, DOI: 10.1080/00222933.2013.791952, http://zenodo.org/record/4608237
Parachernes (Parachernes) nitidimanus
Creators: name: Bedoya-Roqueme, Edwin
name: Tizo-Pedroso, Everton
name: Barbier, Eder
name: Lira, André Felipe De Araújo
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Pseudoscorpiones
Chernetidae
Parachernes
Parachernes nitidimanus

description: Parachernes (Parachernes) nitidimanus (Ellingsen, 1905)
Material examined. 1 female, Pernambuco, Brazil: Furna do Morcego cave, 8°34’14.1”S; 37°22’55.6”W, 556 m a.s.l., 09-V-2019; Catimbau National Park, E. Barbier leg. (LECA; Ps-SCR010).
Diagnosis. According to Ellingsen (1905) and Beier (1932b) can be easily distinguished from the other species of the genus Parachernes Chamberlin (1931) by the carapace as long as broad 1.14×, gradually narrowing forwards, the short frontal margin straightened. Metazone distinctly granulated, yet a little glossy before the first furrow. Two distinct transverse furrows, the anterior one about in the middle, the posterior one somewhat nearer to the hinder margin than to the anterior furrow. Tergite divided (except XI), slightly granulated, al setae rather long, slightly clavate. Chaetotaxy tergal: 10: 10: 10: 8(1): 8(2): 6(2): 8(2): 8(2): 8(2): 10(2): 4(2ST):2. Genital region opercula with a central group of 18 short, three setae on each side, and ten marginal setae. Chelicerae, female with galea very slender and short, with some fine teeth in and near the extremity on the underside, male with about 6 terminal branches; paired spermatheca, typical of the genus. Pedipalps moderately strong, all segments smooth and glossy. The setae on the inner side of the trochanter and femur are slightly clavate, the other setae of the palps are slightly dentate in the extremity, on the fingers simple with some longer ones intermixed; trochanter and the proximal part of femur slightly shagreened; femur 2.35×, strongly granulated; patella 2.02×, more slightly, rather shagreened. chela with pedicel 3.18×, chela without pedicel 2.47×, hand round about smooth and very glossy, fingers as general smooth and glossy.
Measurements (mm). Body length: 2.359. Carapace: 0.771 / 0.672. Pedipalps: trochanter: 0.347 / 0.197, femur: 0.544 / 0.235, patella: 0.589 / 0.266, chela with pedicel: 1.064 / 0.384, chela without pedicel: 0.950 / 0.384, movable finger: 0.538. Chelicera: 0.277 / 0.141, movable finger length:0.202. Leg I: femur: 0.105 / 0.127, patella: 0.317 / 0.137, tibia: 0.272 / 0.091, tarsus: 0.308 / 0.071. Leg IV: femur+patella: 0.569 / 0.158, tibia: 0.318 / 0.103, tarsus: 0.255 / 0.052.
Distribution. Brazil, Saint Vincent, and the Grenadines (Harvey 2013; World Pseudoscorpiones Catalog 2022).
description: Published as part of Bedoya-Roqueme, Edwin, Tizo-Pedroso, Everton, Barbier, Eder & Lira, André Felipe De Araújo, 2023, Two new cave-dwelling pseudoscorpion species (Arachnida: Pseudoscorpiones) from Northeastern Brazil, pp. 317-332 in Zootaxa 5293 (2) on page 320, DOI: 10.11646/zootaxa.5293.2.6, http://zenodo.org/record/7960232
Euthycaelus Simon 1889
Creators: name: Valencia-Cuéllar, Dayana
name: Perafán, Carlos
name: Guerrero, Roberto J.
name: Guadanucci, José Paulo Leite
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Theraphosidae
Euthycaelus

description: Euthycaelus Simon 1889
Euthycaelus Simon 1889: 200; Rudloff 1997: 7 (removed from the synonymy with Holothele, contra Raven 1985: 153); Guadanucci & Weinmann 2014: 276. Type-species. Euthycaelus colonica Simon 1889
Composition. Euthycaelus amandae Guadanucci & Weinmann 2014, Euthycaelus colonica Simon 1889, Euthycaelus norae Guadanucci & Weinmann 2014 and Euthycaelus guane Valencia-Cuellar, Perafán & Guadanucci sp. nov.
Distribution. Colombia and Venezuela.
Species from Colombia. E. amandae, E. guane sp. nov. and E. norae
Diagnosis. Males and females resemble those of the genus Schismatothele but males differ by the palpal bulb being elongated with subtegulum separated from the tegulum (Figs 2–3) and by the swollen palpal tibia with two oblique rows of several thick spines on the distal retrolateral surface (Fig. 7) (Guadanucci & Weinmann 2014). Females are unusual in the spermathecae being composed of a pair of heavily sclerotized single receptacles (Guadanucci & Weinmann 2014: figs 1G–H, 2G–H, 3G–H). Males of Euthycaelus can also be recognized by the cymbium having two asymmetric lobes (Fig. 6), the retrolateral being larger and the prolateral elongated and laterally flattened; and the spur on tibia I with two branches, the retrolateral branch being slender and long (Fig. 8).
Distribution in Colombia. Euthycaelus has a wide latitudinal distribution in Colombia from the south from Cerro Azul (Guaviare) to La Donjuana and Bochalema to northeastern (Norte de Santander); it is also found in Boyacá (Santa María), Meta (Guamal) and Santander (Suaita) Departments. The genus is present in eastern Colombia, with a cis-Andean distribution on the Eastern Cordillera and its foothills, between 300 and 1700 masl, mainly inhabiting forests of Andean influence (Fig. 36).
description: Published as part of Valencia-Cuéllar, Dayana, Perafán, Carlos, Guerrero, Roberto J. & Guadanucci, José Paulo Leite, 2019, Schismatothelinae spiders (Araneae, Mygalomorphae, Theraphosidae) from Colombia: four new species and an approach to their diversity, pp. 548-562 in Zootaxa 4545 (4) on page 551, DOI: 10.11646/zootaxa.4545.4.6, http://zenodo.org/record/2618325
Drosophila neocordata Magalhaes 1956
Creators: name: Roman, Bruna Emilia
name: Madi-Ravazzi, Lilian
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Drosophilidae
Drosophila
Drosophila neocordata

description: Drosophila neocordata Magalhães, 1956
(Fig. 16)
Non-type material. Strain CG (Campo Grande, Mato Grosso do Sul, Brazil): 12 males dissected.
Male terminalia. The dorso-ventral region of the epandrium is angular. The epandrium is covered with short and long epandrial bristles (Fig. 16E). The cercus is U-shaped, covered with cercal bristles (Fig. 16E). The surstyli is concave and has a row of 5 to 6 surstylar teeth arranged throughout the internal portion of each surstylus and a tuft of long surstylar bristles at the inferior region (Fig. 16E). Each surstylus of this species have a unique characteristic, not seen in other subgroups, the surstylar process. This structure is found connected to each surtylus and it has surstylar teeth at its ends (Fig. 16E). The hypandrium is small and it has a median gonocoxites, with the presence of a hypandrial bristle at each end (Fig. 16A). The aedeagus presents a pair of chitinous hooks in the frontal region of the aedeagal apex, which extend to the ventral region of the aedeagus body (Fig. 16A–D). There is a pair of long protuberances, serrated at the edge, arranged laterally, and fused to the aedeagus; we suggest that these protuberances can be the aedeagal sheath partly fused to the aedeagus body (Fig. 16B, C). The pregonites are more different, they seem to be fused into a single structure, and present two small pregonal bristles (Fig. 16B, C). The ventral postgonites are long, thin, and bifurcated in the middle region; they are also folded inward at their ends, which fit into the chitinous hooks (Fig. 16B–D). The pregonite and the ventral postgonites are connected to the phallapodeme (Fig. 16B–D). The phallapodeme is short and thin (Fig. 16B, D).
description: Published as part of Roman, Bruna Emilia & Madi-Ravazzi, Lilian, 2021, Male terminalia morphology of sixteen species of the Drosophila saltans group Sturtevant (Diptera, Drosophilidae), pp. 523-544 in Zootaxa 5061 (3) on page 540, DOI: 10.11646/zootaxa.5061.3.7, http://zenodo.org/record/5649958
Petterchernes brasiliensis Heurtault 1986
Creators: name: Bedoya-Roqueme, Edwin
name: Tizo-Pedroso, Everton
name: Barbier, Eder
name: Lira, André Felipe De Araújo
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Pseudoscorpiones
Chernetidae
Petterchernes
Petterchernes brasiliensis

description: Petterchernes brasiliensis Heurtault, 1986
Material examined. 1 male, Pernambuco, Brazil: Furna do Morcego cave, 8°34’14.1”S; 37°22’55.6”W, 556 m a.s.l., 09-V-2019; Catimbau National Park, E. Barbier leg. (LECA; Ps-SCR011).
Diagnosis. According to Heurtault (1986) and Mahnert (1994) the males of Petterchernes brasiliensis Heurtault, 1986 can be easily distinguished by the carapace without eyes and without eyespots, dark brown, metazone finely granulated, setae of the carapace and tergites strongly clavate, with two deep transverse furrows, for setae on anterior margin; tergites divided, granulate. Chaetotaxy tergal: 9: 9: 9: 10: 10: 10: 12: 12: 10: 10: 10: 2. Genital region operculum with 32 setae and ten setae on posterior margin. Chelicerae, galea with multiple branches, and three blades in the rallum. Pedipalps coarsely granulate, setae stout and enlarged, trochanter 1.67×, with high dorsal hump, femur 2.22×, abruptly enlarged, patella 2.15×, chela with pedicel 2.28×, chela without pedicel 2.09×, trichobothrium isb, ib, and est at same level, hand with well pronounced internal hump bearing some longer and stouter setae. Legs, tarsus IV without tactile setae, claws smooth and simple, subterminal seta smooth, curve.
Measurements (mm). Body length: 1.251. Carapace: 0.554 / 0.473. Pedipalps: trochanter: 0.269 / 0.161, femur: 0.477 / 0.214, patella: 0.415 / 0.193, chela with pedicel: 0.766 / 0.335, chela without pedicel: 0.7020 / 0.335, movable finger: 0.418. Leg I: trochanter: 0.137 / 0.085, femur: 0.131 / 0.115, patella: 0.106 / 0.076, tibia: 0.127 / 0.078, tarsus: 0.202 / 0.047. Leg IV: trochanter: 0.153 / 0.121, femur+patella: 0.380 / 0.121, tibia: 0.164 / 0.086, tarsus: 0.276 / 0.058.
Distribution. Brazil (Harvey 2013; World Pseudoscorpiones Catalog 2022).
description: Published as part of Bedoya-Roqueme, Edwin, Tizo-Pedroso, Everton, Barbier, Eder & Lira, André Felipe De Araújo, 2023, Two new cave-dwelling pseudoscorpion species (Arachnida: Pseudoscorpiones) from Northeastern Brazil, pp. 317-332 in Zootaxa 5293 (2) on page 321, DOI: 10.11646/zootaxa.5293.2.6, http://zenodo.org/record/7960232
Missing theoretical evidence for conventional room temperature superconductivity in low enthalpy structures of carbonaceous sulfur hydrides
Creators: name: Gubler, Moritz
name: Flores-Livas, José A.
name: Kozhevnikov, Anton
name: Goedecker, Stefan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: To elucidate the geometric structure of the putative room temperature superconductor, carbonaceous sulfur hydride, at high pressure, we present the results of an extensive computational structure search of bulk C-S-H at 250 gigapascals. Using the minima hopping structure prediction method coupled to the GPU accelerated Sirius library, more than 17,000 local minima with different stochiometries in large simulation cells were investigated. Only 24 stochiometries are favourable against elemental decomposition, all of them are carbon doped H$_3$S crystals. The absence of van Hove singularities or similar peaks in the electronic density of states of more than 3.000 candidate phases rules out conventional superconductivity in C-S-H at room-temperature.
(Tricondyla) Latreille 1822
Creators: name: Anichtchenko, Alexander
name: Wiesner, Jürgen
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia

description: Subgenus Tricondyla Latreille, 1822
Type species. Tricondyla aptera (Olivier, 1790)
Differential diagnosis. Apices of elytra rounded in males, more elongated in females. Maximal width of aedeagus at the middle, median lobe narrow at basal part. Endophallus without appendix. Base of interocular cavity at same level as neck; without distinct transverse line between neck and occiput.
description: Published as part of Anichtchenko, Alexander & Wiesner, Jürgen, 2024, Tiger beetles of the genus Tricondyla Latreille, 1822 (Coleoptera: Cicindelidae) of the Philippines, with some considerations of the taxonomy of the genus, pp. 351-376 in Zootaxa 5397 (3) on page 353, DOI: 10.11646/zootaxa.5397.3.3, http://zenodo.org/record/10468872
Fine-grained Meta-Theorems for Vertex Integrity
Creators: name: Lampis, Michael
name: Mitsou, Valia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Complexity (cs.CC)
subject: Data Structures and Algorithms (cs.DS)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Vertex Integrity is a graph measure which sits squarely between two more well-studied notions, namely vertex cover and tree-depth, and that has recently gained attention as a structural graph parameter. In this paper we investigate the algorithmic trade-offs involved with this parameter from the point of view of algorithmic meta-theorems for First-Order (FO) and Monadic Second Order (MSO) logic. Our positive results are the following: (i) given a graph $G$ of vertex integrity $k$ and an FO formula $ϕ$ with $q$ quantifiers, deciding if $G$ satisfies $ϕ$ can be done in time $2^{O(k^2q+q\log q)}+n^{O(1)}$; (ii) for MSO formulas with $q$ quantifiers, the same can be done in time $2^{2^{O(k^2+kq)}}+n^{O(1)}$. Both results are obtained using kernelization arguments, which pre-process the input to sizes $2^{O(k^2)}q$ and $2^{O(k^2+kq)}$ respectively.

The complexities of our meta-theorems are significantly better than the corresponding meta-theorems for tree-depth, which involve towers of exponentials. However, they are worse than the roughly $2^{O(kq)}$ and $2^{2^{O(k+q)}}$ complexities known for corresponding meta-theorems for vertex cover. To explain this deterioration we present two formula constructions which lead to fine-grained complexity lower bounds and establish that the dependence of our meta-theorems on $k$ is the best possible. More precisely, we show that it is not possible to decide FO formulas with $q$ quantifiers in time $2^{o(k^2q)}$, and that there exists a constant-size MSO formula which cannot be decided in time $2^{2^{o(k^2)}}$, both under the ETH. Hence, the quadratic blow-up in the dependence on $k$ is unavoidable and vertex integrity has a complexity for FO and MSO logic which is truly intermediate between vertex cover and tree-depth.