taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
03819A7F0872FFAD14B3C833FE7819A5.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/14827190/files/figure.png	https://doi.org/10.5281/zenodo.14827190	Figure 2. Holotype left astragalus of Ahvaytum bahndooiveche gen.et sp. nov.(UWGM 1975). 3D model in (A) medial, (B) lateral, (C) lateral transparent, (D) posterior transparent, (E) distal, (F) proximal, (I) anterior, and (J) posterior orthographic views. Photographs in (G) proximal and (H) distal views. Abbreviations: amc, anteromedial corner; ap, ascending process of the astragalus; g, groove; f, foramen; ff, fibular facet; ldn, laterodistal notch (= lateroventral depression); mf, medial fossa; nf, non-articular fossa (= dorsal basin, = semi-elliptical fossa); p, platform; plp, posterolateral process; plr, posterolateral ridge; tf, tibial facet. Diagonal lines indicate broken surfaces.Arrows indicate anterior direction. Scale bar = 1 cm. STL models archived online (morphosource.org ID: 000607569).	Figure 2. Holotype left astragalus of Ahvaytum bahndooiveche gen.et sp. nov.(UWGM 1975). 3D model in (A) medial, (B) lateral, (C) lateral transparent, (D) posterior transparent, (E) distal, (F) proximal, (I) anterior, and (J) posterior orthographic views. Photographs in (G) proximal and (H) distal views. Abbreviations: amc, anteromedial corner; ap, ascending process of the astragalus; g, groove; f, foramen; ff, fibular facet; ldn, laterodistal notch (= lateroventral depression); mf, medial fossa; nf, non-articular fossa (= dorsal basin, = semi-elliptical fossa); p, platform; plp, posterolateral process; plr, posterolateral ridge; tf, tibial facet. Diagonal lines indicate broken surfaces.Arrows indicate anterior direction. Scale bar = 1 cm. STL models archived online (morphosource.org ID: 000607569).	2025-12-31	Lovelace, David M.;Kufner, Aaron M.;Fitch, Adam J.;Rogers, Kristina Curry;Schmitz, Mark;Schwartz, Darin M.;LeClair-Diaz, Amanda;St. Clair, Lynette;Mann, Joshua;Teran, Reba		Zenodo	biologists	Lovelace, David M.;Kufner, Aaron M.;Fitch, Adam J.;Rogers, Kristina Curry;Schmitz, Mark;Schwartz, Darin M.;LeClair-Diaz, Amanda;St. Clair, Lynette;Mann, Joshua;Teran, Reba			
03819A7F0872FFAD14B3C833FE7819A5.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/14827194/files/figure.png	https://doi.org/10.5281/zenodo.14827194	Figure 3. Proximal end of a left femur UWGM 7549 (A–E) referred to Ahvaytum bahndooiveche gen. et sp. nov.). 3D model in (A) anteromedial, (B) posterolateral, (C) proximal, (D) anterolateral, and (E) posteromedial orthographic views. Abbreviations: alt, anterolateral tuber; amt, anteromedial tuber; ce, concave emargination; dlt, dorsolateral trochanter; ft, fossa trochanterica (= facies articularis antitrochanterica); gt, ‘greater trochanter’; pmt, posteromedial tuber; ve, ventral emargination.Arrows indicate anterior direction. Scale bar = 1 cm. STL models archived online (morphosource.org ID: 000607572).	Figure 3. Proximal end of a left femur UWGM 7549 (A–E) referred to Ahvaytum bahndooiveche gen. et sp. nov.). 3D model in (A) anteromedial, (B) posterolateral, (C) proximal, (D) anterolateral, and (E) posteromedial orthographic views. Abbreviations: alt, anterolateral tuber; amt, anteromedial tuber; ce, concave emargination; dlt, dorsolateral trochanter; ft, fossa trochanterica (= facies articularis antitrochanterica); gt, ‘greater trochanter’; pmt, posteromedial tuber; ve, ventral emargination.Arrows indicate anterior direction. Scale bar = 1 cm. STL models archived online (morphosource.org ID: 000607572).	2025-12-31	Lovelace, David M.;Kufner, Aaron M.;Fitch, Adam J.;Rogers, Kristina Curry;Schmitz, Mark;Schwartz, Darin M.;LeClair-Diaz, Amanda;St. Clair, Lynette;Mann, Joshua;Teran, Reba		Zenodo	biologists	Lovelace, David M.;Kufner, Aaron M.;Fitch, Adam J.;Rogers, Kristina Curry;Schmitz, Mark;Schwartz, Darin M.;LeClair-Diaz, Amanda;St. Clair, Lynette;Mann, Joshua;Teran, Reba			
03819A7F0872FFAD14B3C833FE7819A5.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/14827188/files/figure.png	https://doi.org/10.5281/zenodo.14827188	Figure 1. A palaeogeographic map (A) of Triassic outcrops shows the position of key localities (1 to 9); Chugwater Group, Wyoming, USA (inset), local geology surrounding Garrett’s Surprise (star). Chronostratigraphic context of early dinosaur-bearing units (B) shows the relative stratigraphic positions for first occurrences of dinosaurian body and trace fossils tied to a generalized stratigraphic section (C) of the upper Chugwater Group [after Lovelace et al. (2024)]. The shaded box highlights the stratigraphic position of UWGM 1975 and UWGM 7407 within the Popo Agie Formation. Localities:1, Argentina; 2, Brazil; 3, Zimbabwe; 4, India; 5, Germany; 6, Britain; 7, Morocco; 8, Texas, USA (Dockum Group); 9, south-western USA (Chinle/Moenkopi formations); 10, Wyoming, USA (Chugwater Group). Silhouettes (not to scale) on outcrop demonstrate faunal distribution within the Popo Agie and Jelm formations.At, Atreipus sp.; At–Gr, Atreipus–Grallator plexus; An, Anaschisma browni; Be, Beesiiwo cooowuse; Bu, Buettnererpeton bakeri; Br, Brachychirotherium sp.; Eu, Eubrachiosaurus browni; He, Heptasuchus clarki; Pa, Parasuchus bransoni; Po, Poposaurus gracilis; Ni, Ninumbeehan dookoodukah. Artist credits for silhouettes from Phylopic.org and abbreviated formation names provided in the Supporting Information, Text S1. Previously published dinosaur-bearing localities recovered from PBDB (PaleobioDB.org; accessed Feb, 2024; Supporting Information, Data S1).	Figure 1. A palaeogeographic map (A) of Triassic outcrops shows the position of key localities (1 to 9); Chugwater Group, Wyoming, USA (inset), local geology surrounding Garrett’s Surprise (star). Chronostratigraphic context of early dinosaur-bearing units (B) shows the relative stratigraphic positions for first occurrences of dinosaurian body and trace fossils tied to a generalized stratigraphic section (C) of the upper Chugwater Group [after Lovelace et al. (2024)]. The shaded box highlights the stratigraphic position of UWGM 1975 and UWGM 7407 within the Popo Agie Formation. Localities:1, Argentina; 2, Brazil; 3, Zimbabwe; 4, India; 5, Germany; 6, Britain; 7, Morocco; 8, Texas, USA (Dockum Group); 9, south-western USA (Chinle/Moenkopi formations); 10, Wyoming, USA (Chugwater Group). Silhouettes (not to scale) on outcrop demonstrate faunal distribution within the Popo Agie and Jelm formations.At, Atreipus sp.; At–Gr, Atreipus–Grallator plexus; An, Anaschisma browni; Be, Beesiiwo cooowuse; Bu, Buettnererpeton bakeri; Br, Brachychirotherium sp.; Eu, Eubrachiosaurus browni; He, Heptasuchus clarki; Pa, Parasuchus bransoni; Po, Poposaurus gracilis; Ni, Ninumbeehan dookoodukah. Artist credits for silhouettes from Phylopic.org and abbreviated formation names provided in the Supporting Information, Text S1. Previously published dinosaur-bearing localities recovered from PBDB (PaleobioDB.org; accessed Feb, 2024; Supporting Information, Data S1).	2025-12-31	Lovelace, David M.;Kufner, Aaron M.;Fitch, Adam J.;Rogers, Kristina Curry;Schmitz, Mark;Schwartz, Darin M.;LeClair-Diaz, Amanda;St. Clair, Lynette;Mann, Joshua;Teran, Reba		Zenodo	biologists	Lovelace, David M.;Kufner, Aaron M.;Fitch, Adam J.;Rogers, Kristina Curry;Schmitz, Mark;Schwartz, Darin M.;LeClair-Diaz, Amanda;St. Clair, Lynette;Mann, Joshua;Teran, Reba			
03819A7F0872FFAD14B3C833FE7819A5.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/14827200/files/figure.png	https://doi.org/10.5281/zenodo.14827200	Figure 4. Photographs of sulcimentisaurian silesaurid elements from the Garrett’s Surprise locality.Distal end of a left humerus UWGM 7550 (A–E) in (A) anterior, (B) posterior, (C) medial, (D) lateral, (E) and distal views. Proximal end of a right femur UWGM 7407 (F–J) in (F) proximal, (G) anterolateral, (H) posteromedial, (I) posterolateral, and (J) anteromedial views.Abbreviations:alt, anterolateral tuber; amt, anteromedial tuber; at, anterior trochanter; dlt, dorsolateral trochanter; ect, ectepicondyle; ent, entepicondyle; g, groove; gt, ‘greater trochanter;’ ipmt, incipient posteromedial tuber; n, notch; rc, radial condyle; uc, ulnar condyle.Arrows point in the anterior direction.Scale bar equals 1 cm.	Figure 4. Photographs of sulcimentisaurian silesaurid elements from the Garrett’s Surprise locality.Distal end of a left humerus UWGM 7550 (A–E) in (A) anterior, (B) posterior, (C) medial, (D) lateral, (E) and distal views. Proximal end of a right femur UWGM 7407 (F–J) in (F) proximal, (G) anterolateral, (H) posteromedial, (I) posterolateral, and (J) anteromedial views.Abbreviations:alt, anterolateral tuber; amt, anteromedial tuber; at, anterior trochanter; dlt, dorsolateral trochanter; ect, ectepicondyle; ent, entepicondyle; g, groove; gt, ‘greater trochanter;’ ipmt, incipient posteromedial tuber; n, notch; rc, radial condyle; uc, ulnar condyle.Arrows point in the anterior direction.Scale bar equals 1 cm.	2025-12-31	Lovelace, David M.;Kufner, Aaron M.;Fitch, Adam J.;Rogers, Kristina Curry;Schmitz, Mark;Schwartz, Darin M.;LeClair-Diaz, Amanda;St. Clair, Lynette;Mann, Joshua;Teran, Reba		Zenodo	biologists	Lovelace, David M.;Kufner, Aaron M.;Fitch, Adam J.;Rogers, Kristina Curry;Schmitz, Mark;Schwartz, Darin M.;LeClair-Diaz, Amanda;St. Clair, Lynette;Mann, Joshua;Teran, Reba			
03819A7F087FFFAC17E7CE0FFAD81D8E.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/14827204/files/figure.png	https://doi.org/10.5281/zenodo.14827204	Figure 5.UWGM 7435 (left) is an isolated slab containing a single tridactyl pes and possible manus impression attributed to an Atreipus– Grallator plexus tracemaker from the upper Jelm Formation, Natrona County, WY, USA.A digital surface-depth map (right) produced in METASHAPE (v.2.0.3; Agisoft) from surface light-scans demonstrates the depth and toe pad delineations of pes (p) digits II–IV.The manus impression may be present (m?); other than a very slight depression there are no morphological features to confidently identify it as such. Scale bar is in 1-cm increments. Data reposited on Morphosource.org, ID: 000607578.	Figure 5.UWGM 7435 (left) is an isolated slab containing a single tridactyl pes and possible manus impression attributed to an Atreipus– Grallator plexus tracemaker from the upper Jelm Formation, Natrona County, WY, USA.A digital surface-depth map (right) produced in METASHAPE (v.2.0.3; Agisoft) from surface light-scans demonstrates the depth and toe pad delineations of pes (p) digits II–IV.The manus impression may be present (m?); other than a very slight depression there are no morphological features to confidently identify it as such. Scale bar is in 1-cm increments. Data reposited on Morphosource.org, ID: 000607578.	2025-12-31	Lovelace, David M.;Kufner, Aaron M.;Fitch, Adam J.;Rogers, Kristina Curry;Schmitz, Mark;Schwartz, Darin M.;LeClair-Diaz, Amanda;St. Clair, Lynette;Mann, Joshua;Teran, Reba		Zenodo	biologists	Lovelace, David M.;Kufner, Aaron M.;Fitch, Adam J.;Rogers, Kristina Curry;Schmitz, Mark;Schwartz, Darin M.;LeClair-Diaz, Amanda;St. Clair, Lynette;Mann, Joshua;Teran, Reba			
03819A7F087EFFAD1617CAD3FA281AE2.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/14827200/files/figure.png	https://doi.org/10.5281/zenodo.14827200	Figure 4. Photographs of sulcimentisaurian silesaurid elements from the Garrett’s Surprise locality.Distal end of a left humerus UWGM 7550 (A–E) in (A) anterior, (B) posterior, (C) medial, (D) lateral, (E) and distal views. Proximal end of a right femur UWGM 7407 (F–J) in (F) proximal, (G) anterolateral, (H) posteromedial, (I) posterolateral, and (J) anteromedial views.Abbreviations:alt, anterolateral tuber; amt, anteromedial tuber; at, anterior trochanter; dlt, dorsolateral trochanter; ect, ectepicondyle; ent, entepicondyle; g, groove; gt, ‘greater trochanter;’ ipmt, incipient posteromedial tuber; n, notch; rc, radial condyle; uc, ulnar condyle.Arrows point in the anterior direction.Scale bar equals 1 cm.	Figure 4. Photographs of sulcimentisaurian silesaurid elements from the Garrett’s Surprise locality.Distal end of a left humerus UWGM 7550 (A–E) in (A) anterior, (B) posterior, (C) medial, (D) lateral, (E) and distal views. Proximal end of a right femur UWGM 7407 (F–J) in (F) proximal, (G) anterolateral, (H) posteromedial, (I) posterolateral, and (J) anteromedial views.Abbreviations:alt, anterolateral tuber; amt, anteromedial tuber; at, anterior trochanter; dlt, dorsolateral trochanter; ect, ectepicondyle; ent, entepicondyle; g, groove; gt, ‘greater trochanter;’ ipmt, incipient posteromedial tuber; n, notch; rc, radial condyle; uc, ulnar condyle.Arrows point in the anterior direction.Scale bar equals 1 cm.	2025-12-31	Lovelace, David M.;Kufner, Aaron M.;Fitch, Adam J.;Rogers, Kristina Curry;Schmitz, Mark;Schwartz, Darin M.;LeClair-Diaz, Amanda;St. Clair, Lynette;Mann, Joshua;Teran, Reba		Zenodo	biologists	Lovelace, David M.;Kufner, Aaron M.;Fitch, Adam J.;Rogers, Kristina Curry;Schmitz, Mark;Schwartz, Darin M.;LeClair-Diaz, Amanda;St. Clair, Lynette;Mann, Joshua;Teran, Reba			
