Llistrofus was described by Canadian paleontologists Robert Carroll and Pamela Gaskill in 1978.[1] The genus name is an anagram of Fort Sill, the historic name of the Richards Spur locality from which material of Llistrofus was collected. The species name, L. pricei, is given for the Brazilian paleontologist Llewellyn Price. The holotype of this taxon is currently reposited at the Field Museum of Natural History. The skull of the holotype was reappraised by Bolt & Rieppel in 2009.[2] New material from Richards Spur was described by Gee et al. (2019).[3]
Descriptionedit
Life restoration
Llistrofus is readily identified by the presence of a large temporal emargination, a feature shared with Hapsidopareion lepton that unites the Hapsidopareiidae. Carroll & Gaskill (1978) differentiated Llistrofus from Hapsidopareion by four features: (1) postorbital contacting the tabular; (2) postparietal contacting the squamosal; (3) frontals entering the orbit; and (4) presence of a quadratojugal.[1] Bolt & Rieppel (2009) revised the diagnosis following additional preparation of the holotype's skull and list three features (only one of which is shared with the previous work): (1) skull length approximately twice that of Hapsidopareion; (2) frontals entering the orbit; and (3) cultriform process of the parasphenoid offset from the basal plate by a narrow base.[2] Gee et al. (2019) further revised the diagnosis based on additional material from Richards Spur and listed 11 features: (1) frontals entering the orbit; (2) prefrontal entering the naris; (3) premaxilla contributing to ventral narial margin; (4) postfrontal excluded from the temporal emargination; (5) postorbital contacting the tabular; (6) denticles on the vomer; (7) teeth on the palatine smaller than the marginal teeth; (8) absence of a pterygoid-premaxilla contact; (9) a splenial that contributes to the symphysis; (10) presence of a Meckelian foramen; and (11) presence of a retroarticular process.[1]
Classificationedit
Llistrofus is recovered as the sister taxon to Hapsidopareion in phylogenetic analyses, producing the Hapsidopareiidae.[3] A 2022 phylogenetic analysis recovered it within Recumbirostra.[4]
^ abcCarroll, Robert L.; Gaskill, Pamela (1978). The order Microsauria. Philadelphia: American Philosophical Society. ISBN0871691264. OCLC 4314948.
^ abBolt, John R.; Rieppel, Olivier (2009). "The holotype skull of Llistrofus pricei Carroll and Gaskill, 1978 (Microsauria: Hapsidopareiontidae)". Journal of Paleontology. 83 (3): 471–483. Bibcode:2009JPal...83..471B. doi:10.1666/08-076.1. ISSN 0022-3360. S2CID 128436286.
^ abGee, Bryan M.; Bevitt, Joseph J.; Garbe, Ulf; Reisz, Robert R. (2019-01-25). "New material of the 'microsaur' Llistrofus from the cave deposits of Richards Spur, Oklahoma and the paleoecology of the Hapsidopareiidae". PeerJ. 7: e6327. doi:10.7717/peerj.6327. ISSN 2167-8359. PMC6348957. PMID 30701139.
^Mann, Arjan; Pardo, Jason D; Sues, Hans-Dieter (2022-07-19). "Osteology and phylogenetic position of the diminutive 'microsaur' Odonterpeton triangulare from the Pennsylvanian of Linton, Ohio, and major features of recumbirostran phylogeny". Zoological Journal of the Linnean Society. 197 (3): 641–655. doi:10.1093/zoolinnean/zlac043. ISSN 0024-4082.
January 01, 1970
llistrofus, extinct, genus, early, permian, microsaur, within, family, hapsidopareiidae, that, known, from, oklahoma, temporal, range, permian, preꞒ, skeletal, diagram, scientific, classification, kingdom, animalia, phylum, chordata, class, amphibia, subclass,. Llistrofus is an extinct genus of early Permian microsaur within the family Hapsidopareiidae that is known from Oklahoma LlistrofusTemporal range Permian 289 286 Ma PreꞒ Ꞓ O S D C P T J K Pg N Skeletal diagram Scientific classification Kingdom Animalia Phylum Chordata Class Amphibia Subclass Lepospondyli Order Microsauria Suborder Tuditanomorpha Family Hapsidopareiidae Genus LlistrofusCarroll amp Gaskill 1978 Type species Llistrofus priceiCarroll amp Gaskill 1978 Contents 1 Discovery 2 Description 3 Classification 4 See also 5 ReferencesDiscovery editLlistrofus was described by Canadian paleontologists Robert Carroll and Pamela Gaskill in 1978 1 The genus name is an anagram of Fort Sill the historic name of the Richards Spur locality from which material of Llistrofus was collected The species name L pricei is given for the Brazilian paleontologist Llewellyn Price The holotype of this taxon is currently reposited at the Field Museum of Natural History The skull of the holotype was reappraised by Bolt amp Rieppel in 2009 2 New material from Richards Spur was described by Gee et al 2019 3 Description edit nbsp Life restoration Llistrofus is readily identified by the presence of a large temporal emargination a feature shared with Hapsidopareion lepton that unites the Hapsidopareiidae Carroll amp Gaskill 1978 differentiated Llistrofus from Hapsidopareion by four features 1 postorbital contacting the tabular 2 postparietal contacting the squamosal 3 frontals entering the orbit and 4 presence of a quadratojugal 1 Bolt amp Rieppel 2009 revised the diagnosis following additional preparation of the holotype s skull and list three features only one of which is shared with the previous work 1 skull length approximately twice that of Hapsidopareion 2 frontals entering the orbit and 3 cultriform process of the parasphenoid offset from the basal plate by a narrow base 2 Gee et al 2019 further revised the diagnosis based on additional material from Richards Spur and listed 11 features 1 frontals entering the orbit 2 prefrontal entering the naris 3 premaxilla contributing to ventral narial margin 4 postfrontal excluded from the temporal emargination 5 postorbital contacting the tabular 6 denticles on the vomer 7 teeth on the palatine smaller than the marginal teeth 8 absence of a pterygoid premaxilla contact 9 a splenial that contributes to the symphysis 10 presence of a Meckelian foramen and 11 presence of a retroarticular process 1 Classification editLlistrofus is recovered as the sister taxon to Hapsidopareion in phylogenetic analyses producing the Hapsidopareiidae 3 A 2022 phylogenetic analysis recovered it within Recumbirostra 4 See also edit nbsp Paleontology portal Prehistoric amphibian List of prehistoric amphibiansReferences edit a b c Carroll Robert L Gaskill Pamela 1978 The order Microsauria Philadelphia American Philosophical Society ISBN 0871691264 OCLC 4314948 a b Bolt John R Rieppel Olivier 2009 The holotype skull of Llistrofus pricei Carroll and Gaskill 1978 Microsauria Hapsidopareiontidae Journal of Paleontology 83 3 471 483 Bibcode 2009JPal 83 471B doi 10 1666 08 076 1 ISSN 0022 3360 S2CID 128436286 a b Gee Bryan M Bevitt Joseph J Garbe Ulf Reisz Robert R 2019 01 25 New material of the microsaur Llistrofus from the cave deposits of Richards Spur Oklahoma and the paleoecology of the Hapsidopareiidae PeerJ 7 e6327 doi 10 7717 peerj 6327 ISSN 2167 8359 PMC 6348957 PMID 30701139 Mann Arjan Pardo Jason D Sues Hans Dieter 2022 07 19 Osteology and phylogenetic position of the diminutive microsaur Odonterpeton triangulare from the Pennsylvanian of Linton Ohio and major features of recumbirostran phylogeny Zoological Journal of the Linnean Society 197 3 641 655 doi 10 1093 zoolinnean zlac043 ISSN 0024 4082 Retrieved from https en wikipedia org w index php title Llistrofus amp oldid 1190216125, wikipedia, wiki, book, books, library,
