{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,3]],"date-time":"2026-07-03T20:27:43Z","timestamp":1783110463108,"version":"3.54.6"},"reference-count":77,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2025,10,23]],"date-time":"2025-10-23T00:00:00Z","timestamp":1761177600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2025,10,23]],"date-time":"2025-10-23T00:00:00Z","timestamp":1761177600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/100000001","name":"National Science Foundation","doi-asserted-by":"publisher","award":["EAR\u2010943286"],"award-info":[{"award-number":["EAR\u2010943286"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["anatomypubs.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["The Anatomical Record"],"published-print":{"date-parts":[[2026,8]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Unguals (\u201cclaws\u201d) are important tools that allow terrestrial vertebrates to navigate their environments, from subduing prey to climbing, running, and digging, with the shape of the element being broadly correlated with their ecological niche. Middle Triassic\u2010Late Triassic drepanosauromorphs (Sauropsida: Diapsida) have been hypothesized to occupy various niches and functional modes from arboreality to fossoriality based on a range of evidence including claw anatomy. Hypertrophied manual unguals are present in many members of Drepanosauromorpha and vary in shape from the strongly curved, mediolaterally compressed, and dorsoventrally tall\n                    <jats:italic>Drepanosaurus\u2010<\/jats:italic>\n                    like forms to the shallowly curved and mediolaterally wide unguals of\n                    <jats:italic>Skybalonyx<\/jats:italic>\n                    . Here, we detail and compare the external and internal features of western North American drepanosauromorph unguals. Using osteohistology and micro\u2010computed X\u2010ray tomography, we find that drepanosauromorph manual unguals possess a combination of characteristics that differentiate drepanosauromorph taxa. Using external and internal characteristics, we identify a new taxon of drepanosauromorph,\n                    <jats:italic>Fabanychus monos<\/jats:italic>\n                    gen. et sp. nov., from the upper Sonsela Member of the Upper Triassic Chinle Formation (~214\u2009Ma) at Petrified Forest National Park in northeastern Arizona. More broadly, we find that drepanosauromorph manual unguals share a set of unique character states compared to other extant and extinct reptilian and mammalian unguals. Each drepanosauromorph ungual morphotype is diagnostic to a distinct taxon, revealing biostratigraphic patterns of the clade. The spatiotemporal and lithostratigraphic occurrence of drepanosauromorphs in equatorial Pangaea reveal a long record of the group, co\u2010occurring taxa, and possible genus\u2010level turnover in the middle Norian (~215\u2009Ma).\n                  <\/jats:p>","DOI":"10.1002\/ar.70057","type":"journal-article","created":{"date-parts":[[2025,10,23]],"date-time":"2025-10-23T07:36:19Z","timestamp":1761204979000},"page":"2049-2083","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Gross anatomy and histological analysis of manual unguals of Drepanosauromorpha (Sauropsida: Diapsida) and description of a new taxon from the Sonsela Member of the Chinle Formation (Late Triassic) of the southwestern United States"],"prefix":"10.1002","volume":"309","author":[{"ORCID":"https:\/\/orcid.org\/0009-0003-1184-6044","authenticated-orcid":false,"given":"Megan P.","family":"Sodano","sequence":"first","affiliation":[{"name":"Department of Geosciences Virginia Tech  Blacksburg Virginia USA"},{"name":"Division of Integrative Anatomical Sciences Keck School of Medicine, University of Southern California  Los Angeles California USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4400-8963","authenticated-orcid":false,"given":"Ben T.","family":"Kligman","sequence":"additional","affiliation":[{"name":"Department of Geosciences Virginia Tech  Blacksburg Virginia USA"},{"name":"Department of Science and Resource Management Petrified Forest National Park  Petrified Forest Arizona USA"},{"name":"Department of Paleobiology National Museum of Natural History, Smithsonian Institution  Washington DC USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3223-8940","authenticated-orcid":false,"given":"Adam D.","family":"Marsh","sequence":"additional","affiliation":[{"name":"Department of Science and Resource Management Petrified Forest National Park  Petrified Forest Arizona USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8722-0011","authenticated-orcid":false,"given":"Adam C.","family":"Pritchard","sequence":"additional","affiliation":[{"name":"Virginia Museum of Natural History  Martinsville Virginia USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6473-8691","authenticated-orcid":false,"given":"Michelle R.","family":"Stocker","sequence":"additional","affiliation":[{"name":"Department of Geosciences Virginia Tech  Blacksburg Virginia USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6005-7098","authenticated-orcid":false,"given":"William G.","family":"Parker","sequence":"additional","affiliation":[{"name":"Department of Science and Resource Management Petrified Forest National Park  Petrified Forest Arizona USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3725-0906","authenticated-orcid":false,"given":"Gabriel S.","family":"Gon\u00e7alves","sequence":"additional","affiliation":[{"name":"Department of Geosciences Fort Hays State University  Hays Kansas USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7017-1652","authenticated-orcid":false,"given":"Sterling J.","family":"Nesbitt","sequence":"additional","affiliation":[{"name":"Department of Geosciences Virginia Tech  Blacksburg Virginia USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,10,23]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.3389\/feart.2018.00252"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1134\/S0031030111060025"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12983-017-0241-x"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1093\/icb\/icz151"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1017\/S0022336000020928"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1558-5646.2008.00430.x"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.31711\/giw.v3.pp1-32"},{"key":"e_1_2_8_9_1","unstructured":"Britt B. B. Jackson A. Horn A. M. Theurer B. C. Chure D. J. Engelmann G. F. &Scheetz R. D.(2020).Drepanosaurs: Weird to the bone. Society of Vertebrate Paleontology Conference Abstract."},{"key":"e_1_2_8_10_1","unstructured":"Britt B. B. Pritchard A. C. Chure D. J. Engelmann G. F. Scheetz R. D. Theurer B. C. &Esplin R. B.(2019).Still stranger things: Micro CT imaging of 3D drepanosaur skulls and skeletons (Saints & Sinners quarry Late Triassic eolian\/interdunal nugget formation) reveals bizarre and novel morphologies including a beak combined with transversely wide teeth sauropod\u2010like pneumatic dorsal vertebrae a chevron that articulates with the pelvis and tripodal adaptations. Society of Vertebrate Paleontology Conference Abstract."},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1093\/zoolinnean\/zlae050"},{"key":"e_1_2_8_12_1","first-page":"49","article-title":"Megalancosaurus preonensis N.G., N. 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