Find research datasets worth reusing

Figure 8 in The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny

Figure 8. The lower left mandible of Brazilian sphenodontians. A–C, J, Clevosaurus brasiliensis (UFRGS-PV-0748-T) in: A, lateral; B, dorsal; C, medial; and J, scaled lateral views. D, I, Clevosaurus brasiliensis (UFSM-PV-0131) in: D, lateral; and I, scaled lateral views. E, K, Clevosaurus brasiliensis (UFRGS-PV-0974-T) in: E, lateral; and K, scaled lateral views. F–H, L, Microsphenodon bonapartei gen. et sp. nov. (UFRGS-PV-0972-T) in: F, lateral; G, dorsal; H, medial; and L, scaled lateral views. M, Lanceirosphenodon (CAPPA/UFSM 0226) in scaled view. Abbreviations: add, additional; alt, alternating; ang, angular; artcom, articular complex; cor, coronoid; cpr, coronoid process; ht, hatchling; mc, Meckelian canal; men, mentonian; mdf, mandibular foramen; pra, prearticular; proc, process; ret, retroarticular; sb, secondary bone; sur, surangular; sy, symphysis; th, tooth; wft, wear facet. Scale bars equal 10 mm.

Figure 7 in The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny

Figure 7. The braincase and cervical vertebra of Clevosaurus brasiliensis (A–F, UFRGS-PV-0748-T; G–I, UFSM-PV-0131; J–N, UFRGS-PV-0974-T). A–F, near-complete braincase of UFRGS-PV-0748-T in: A, posterior; B, dorsal; C, ventral; D, anterior; E, left lateral; and F, right lateral views. G–I, the partial left half of the braincase of UFSM-PV-0131 in: G, anterolateral; H, ventral; and I, dorsal views. J–N, the articulated cervical vertebra of UFRGS-PV-0974-T in: J, right lateral; K, ventral; L, dorsal; M, posterior; and N, anterior views. Abbreviations: ax, axis; bo, basioccipital; bs, basisphenoid; car. for, carotid foramen; cen, centrum; cul. proc, cultriform process; eo, exoccipital; fac, facet; ne. arch, neural arch; ocon, occipital condyle; op, opisthotic; par, paroccipital; pila, pila antotica; pr, prootic; proc, process; ps, parasphenoid; pt, pterygoid; so, supraoccipital; st, supratemporal. Scale bar for A–L equals 5 mm; M, N equals 1 mm.

Figure 11 in The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny

Figure 11. Digital segmentation of selected cranial material of the holotype of Microsphenodon bonapartei gen. et sp. nov. (UFRGS-PV-0972-T). A–C, left maxilla in: A, lateral; B, ventral; and C, medial views. D–F, left nasal and prefrontal in: D, dorsal; E, lateral; and F, posterior views. G, H, left postfrontal in: G, medial; and H, lateral views. I, J, articulated frontals and parietals in: I, dorsal; and J, ventral views. K, L, left jugal in: K, lateral; and L, medial views. M, N, left postorbital in: M, medial; and N, lateral views. O, P, right squamosal in: O, lateral; and P, medial views. Abbreviations: add, additional; alt, alternating; ant, anterior; can, caniniform; con, conical; ept, epipterygoid; f, frontal; fac, facet; fl, flange; j, jugal; m, maxilla; n, nasal; p, parietal; pal, palatine; pfr, prefrontal; pinf, pineal foramen; pm, premaxilla; po, postorbital; pof, postfrontal; post, posterior; prf, prefrontal; proc, process; q, quadrate; sq, squamosal; st, supratemporal; th, tooth; ven, ventral. Scale bars for A–H, K–P equal 5 mm; I, J equal 10 mm.

Figure 6 in The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny

Figure 6. Ventral view of palatines for Clevosaurus brasiliensis (A–D), and Microsphenodon bonapartei gen. et sp. nov. (E–G). A, UFSM-PV-0131; B, UFRGS-PV-0748-T; C, UFRGS-PV-0974-T; D, MCN-PV 2852. E, right palatine, UFRGS-PV-0827-T; F, right palatine, UFRGS-PV-0613-T; G, left palatine, UFRGS-PV-0972-T. Abbreviations: cl, cluster; d, dentary; iso, isolated; lat, lateral; rid, ridge; th, tooth. Not to scale.

Figure 5 in The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny

Figure 5. Cranial material of Clevosaurus brasiliensis (A–F, UFSM-PV-0131; G–M, UFRGS-PV-0748-T). A–C, left supratemporal in: A, posterolateral; B, anteromedial; and C, posteroventral views. D–F, right quadrate in: D, posterior; E, lateral; F, medial views. G, left quadrate in anteromedial view. H, left vomer in ventral view. I, right palatine in ventral view. J, K, pterygoids in J, ventral; and K, dorsal views. L, left ectopterygoid in ventral view. M, palate in left lateral view. Abbreviations: artcon, articular condyle; bs, basisphenoid; cl, cluster; epi, epipterygoid; ept, ectopterygoid; fac, facet; for, foramen; lat, lateral; m, maxilla; p, parietal; pal, palatine; pla, plate; pr, prootic; pt, pterygoid; q, quadrate; qj, quadratojugal; rid, ridge; sq, squamosal; st, supratemporal; th, tooth; ven, ventral; ver, vertical; vo, vomer. Scale bars for A–G, I–K, M equal 5 mm; H, L equal 1 mm.

Figure 4 in The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny

Figure 4. Cross-sections of the tooth implantation in Microsphenodon bonapartei gen. et sp. nov. (A–C, N) and Clevosaurus brasiliensis (D–M, O). A–C, coronal cross-sections showing tooth implantation in Microsphenodon bonapartei (UFRGS-PV-0972-T) in: A, posterior-most dentary tooth; B, posterior-most maxillary tooth; and C, palate. D–H, coronal cross-sections showing tooth implantation in Clevosaurus brasiliensis (UFRGS-PV-0748-T) in: D, posterior-most dentary tooth; E, penultimate additional maxillary tooth; H, hatchling teeth; and for UFRGS-PV-0974-T in F, ultimate maxillary and dentary teeth; and G, hatchling teeth. Sagittal cross-sections of the bone bearing elements of Clevosaurus brasiliensis (UFRGS-PV-0974-T) for I, palatine; J, left pterygoid; K, right pterygoid; L, left maxilla; and M, left dentary. N, left maxilla and dentary of Microsphenodon bonapartei (UFRGS-PV-0972-T) demonstrating the depth of the acrodont implantation. O, left maxilla and dentary of Clevosaurus brasiliensis (UFRGS-PV-0748-T) demonstrating the depth of the acrodont implantation. Abbreviations: add, additional; alc, alveolar canal; cap, pulp cavity; d, dentary; ht, hatchling; j, jugal; m, maxilla; mc, Meckelian canal; pal, palatine; pm, premaxilla; prf, prefrontal; pt, pterygoid; th, tooth. Scale bars for A–K equal 1 mm; L–O equal 10 mm.

Figure 12 in The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny

Figure 12. Digital segmentation of selected cranial material of the holotype of Microsphenodon bonapartei gen. et sp. nov. (UFRGS-PV-0972-T). A, B, left supratemporal in: A, dorsal; and B, ventral views. C–E, left quadrate in: C, medial; D, lateral; E, posterior views. F, left vomer in ventral view. G, H, left palatine in: G, lateral; and H, ventral views. I, J, pterygoids in: I, ventral; and J, dorsal views. K, left ectopterygoid in ventral view. L, left pterygoid and epipterygoid in lateral view. Abbreviations: ant, anterior; artcon, articular condyle; bs, basisphenoid; epi, epipterygoid; ept, ectopterygoid; fac, facet; fl, flange; for, foramen; iso, isolated; j, jugal; lat, lateral; m, maxilla; med, medial; p, parietal; pal, palatine; proc, process; pt, pterygoid; q, quadrate; qj, quadratojugal; rid, ridge; sq, squamosal; th, tooth; ven, ventral; ver, vertical; vo, vomer. Scale bars for A, B, F–H, K equals 1 mm; C, D, I, J, L equals 5 mm.

Figure 2 in The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny

Figure 2. The digitally segmented holotype skull of Clevosaurus brasiliensis (UFRGS-PV-0748-T). A, left lateral; B, right lateral; C, ventral; D, dorsal; and E, posterior views. Abbreviations: artcom, articular complex; bo, basioccipital; bs, basisphenoid; cor, coronoid; d, dentary; eo, exoccipital; epi, epipterygoid; ept, ectopterygoid; f, frontal; j, jugal; m, maxilla; n, nasal; op, opisthotic; p, parietal; pal, palatine; pm, premaxilla; po, postorbital; pof, postfrontal; pr, prootic; pra, prearticular; prf, prefrontal; ps, parasphenoid; pt, pterygoid; q, quadrate; so, supraoccipital; sq, squamosal; st, supratemporal; vo, vomer. Scale bar equals 10 mm.

Figure 1 in The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny

Figure 1. Cranial material of Clevosaurus brasiliensis. A–C, skull of UFRGS-PV-0748-T in: A, dorsal; B, ventral; and C, right lateral views. D, E, skull of UFSM-PV-0131 in D, dorsal; and E, ventral views. F, G, skull of UFRGS-PV-0974-T in: F, right lateral; and G, left lateral views. Scale bars equal 5 mm.

Figure 3 in The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny

Figure 3. Digital segmentation of selected cranial material of Clevosaurus brasiliensis (A, B, F–H, R, S, UFSM-PV-0131; C–E, I–O, UFRGS-PV-0748-T; P, Q, UFRGS-PV-0974-T). A, B, right premaxilla in A, lateral; and B, anterior views. C–E, right maxilla in C, lateral; D, ventral; and E, medial views. F, G, nasals in F, left lateral; and G, anterior views. H, rostrum in left lateral view. I, right prefrontal in lateral view. J, right postfrontal in lateral view. K, left postfrontal in medial view. L, parietals and frontals in dorsal view. M, frontals in ventral view. N, O, left jugal in N, lateral; and O, medial views. P, Q, left postorbital in P, lateral; and Q, medial views. R, S, left squamosal in R, lateral; and S, medial views. Abbreviations: add, additional; ant, anterior; con, conical; ept, ectopterygoid; f, frontal; fac, facet; ht, hatchling; j, jugal; m, maxilla; n, nasal; p, parietal; pal, palatine; pinf, pineal foramen; pm, premaxilla; po, postorbital; pof, postfrontal; post, posterior; prf, prefrontal; proc, process; q, quadrate; sq, squamosal; st, supratemporal; th, tooth; ven, ventral. Scale bars for C–E, L, M equal 10 mm; F, G, I, N–S equal 5 mm; and A, B, H, J, K equal 1 mm.

Figure 10 in The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny

Figure 10. The digitally segmented holotype skull of Microsphenodon bonapartei gen. et sp. nov. (UFRGS-PV-0972-T). A, left lateral; B, posterior; C, dorsal; and D, ventral views. Abbreviations: artcom, articular complex; bo, basioccipital; bs, basisphenoid; c. vert, cervical vertebra; d, dentary; eo, exoccipital; epi, epipterygoid; ept, ectopterygoid; f, frontal; hy, hyoid; j, jugal; m, maxilla; n, nasal; op, opisthotic; p, parietal; pal, palatine; po, postorbital; pof, postfrontal; pr, prootic; prf, prefrontal; ps, parasphenoid; pt, pterygoid; q, quadrate; so, supraoccipital; sq, squamosal; st, supratemporal; vo, vomer. Scale bar equals 10 mm.

Figure 15 in The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny

Figure 15. Life reconstruction of Microsphenodon bonapartei gen. et sp. nov. (top left) and Clevosaurus brasiliensis (bottom right). Work by Lavinia Gandolfi.

Figure 14 in The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny

Figure 14. Reconstructions of the skulls of Clevosaurus brasiliensis (A–D) and Microsphenodon bonapartei gen. et sp. nov. (E–H). A, B, cranium of C. brasiliensis in: A, dorsal; B, ventral views. C, right lateral view of the cranium and mandible of C. brasiliensis. D, a medial view of the right mandible of C. brasiliensis. E, F, cranium of M. bonapartei in: E, dorsal, F, ventral views. G, a right lateral view of the cranium and mandible of M. bonapartei. H, a medial view of the right mandible of M. bonapartei. Abbreviations: ang, angular; art, articular; bo, basioccipital; bs, basisphenoid; cor, coronoid; d, dentary; epi, epipterygoid; ept, ectopterygoid; f, frontal; j, jugal; m, maxilla; n, nasal; p, parietal; pal, palatine; pm, premaxilla; po, postorbital; pof, postfrontal; pfr, prefrontal; pra, prearticular; ps, parasphenoid; pt, pterygoid; q, quadrate; so, supraoccipital; sq, squamosal; st, supratemporal; sur, surangular; vo, vomer. Scale bars equal 10 mm.

Figure 17 in Aras Valley (northwest Iran): high-resolution stratigraphy of a continuous central Tethyan Permian-Triassic boundary section

Figure 17. Selected representatives of nautiloids from the Aras Valley section. (a) Domatoceras parallelum (Abich, 1878), specimen MB.C.29346 from the lower Julfa Formation. (b) Pleuronautilus sp., specimen MB.C.29347 from the lower Julfa Formation. (c) Tainoceras (?) sp., specimen MB.C.29348 from the upper Julfa Formation. (d) Pleuronautilus sp., specimen MB.C.29349 from the Zal Member. (e) Liroceras sp., specimen MB.C.29350 from the lower Julfa Formation. (f) Permoceras abichi (Kruglov, 1928), specimen MB.C.29351 from the lower Julfa Formation. (g) Liroceras sp., specimen MB.C.29352 from the lower Julfa Formation.

Figure 18 in Aras Valley (northwest Iran): high-resolution stratigraphy of a continuous central Tethyan Permian-Triassic boundary section

Figure 18. Succession carbon isotopes (δ13 C) in the Aras Valley section and correlation with the conodont stratigraphy. Abbreviated carb conodont zones: (1) Clarkina bachmanni, (2) Clarkina abadehensis, (3) Clarkina hauschkei, (4) Merrillina ultima–Stepanovites mostleri.

opencc-by-4.0Mar 2021View details →

Figure 2. Triassic amphibian remains from Thailand. A in First occurrence of brachyopid temnospondyls in Southeast Asia and review of the Mesozoic amphibians from Thailand

Figure 2. Triassic amphibian remains from Thailand. A replica skull of Cyclotosaurus cf. posthumus (D.M.R. Ch.D 001) in dorsal (a), palatal (b), and posterior views (c). A reconstruction of Thai Cyclotosauridae (d). A dermal bone of Plagiosauroidea indet. (TF 1453) in ventral (e) and dorsal (f) views. A reconstruction of Thai Plagiosauroidea (g). Reconstruction images (d, g) are not to scale (drawn by Sita Manitkoon).

Figure 15 in Aras Valley (northwest Iran): high-resolution stratigraphy of a continuous central Tethyan Permian-Triassic boundary section

Figure 15. Selected representatives of ammonoids from the Aras Valley section. (a) Prototoceras discoidale Ruzhencev, 1963, specimen MB.C.29343 from the lower Julfa Formation. (b) Vedioceras fusiforme Korn & Ghaderi, 2019, holotype MB.C.29132 from the upper Julfa Formation. (c) Iranites transcaucasius (Shevyrev, 1965), specimen MB.C.29148 from the Zal Member. (d) Pseudotoceras sp., specimen MB.C.29344 from the lower Julfa Formation. (e) Dzhulfoceras sp., specimen MB.C.29345 from the upper Julfa Formation. (f) Dzhulfites nodosus Shevyrev, 1965, specimen MB.C.29182 from the Zal Member at −9.50 m. (g) Araxoceltites cristatus Korn, Ghaderi and Ghanizadeh Tabrizi, 2019, holotype MB.C.22706 from the Zal Member. (h) Phisonites triangulus Shevyrev, 1965, specimen MB.C.22703 from the Zal Member at −12.90 m.

Figure 13 in Aras Valley (northwest Iran): high-resolution stratigraphy of a continuous central Tethyan Permian-Triassic boundary section

Figure 13. Succession of ostracod species in the Paratirolites Limestone, Aras Member, and Claraia Beds of the Aras Valley section .

Figure 7 in Aras Valley (northwest Iran): high-resolution stratigraphy of a continuous central Tethyan Permian-Triassic boundary section

Figure 7. Carbonate microfacies of samples from the Aras Member (a, b) and the Claraia Beds (c–e) of the Aras Valley section. (a) Burrowed mudstone with calcite fan structures; sample AJ202 (+1.65 m). (b) Burrowed mudstone with calcite fans; sample AJ203 (+2.00 m). (c) Gastropod mudstone and wackestone with microgastropods and sponge remains of possible keratose sponges; sample AJ204 (+2.35 m). (d) Laminated mudstone with irregularly shaped sparry calcite crystals; sample AJ210 (+3.80 m). (e) Laminated mudstone with subrounded sparry calcite crystals; sample AJ216 (+4.95 m). Scale bar units = 1 mm.

Figure 10 in Aras Valley (northwest Iran): high-resolution stratigraphy of a continuous central Tethyan Permian-Triassic boundary section

Figure 10. Characteristic conodonts from the Aras Valley section (scale bars equal to 100 µm); all specimens stored in the collection of the Ferdowsi University, Mashhad. (a) Clarkina leveni Kozur et al., 1975, FUM no. AJ122-1, lower Julfa Formation, upper view; (b) Clarkina guangyuanensis Dai and Zhang in (Li et al., 1989), FUM no. AJ131-7, upper Julfa Formation, upper view; (c) Clarkina liangshanensis (Wang, 1978), FUM no. AJ179-8, upper Julfa Formation, upper view; (d) Clarkina transcaucasica (Gullo and Kozur, 1992), FUM no. AJ151-5, upper Julfa Formation, upper view; (e) Clarkina orientalis (Barskov and Koroleva, 1970), FUM no. AJ157-9, upper Julfa Formation, upper view; (f) Clarkina changxingensis (Wang and Wang in Zhao et al., 1981b), FUM no. AJ173-1, Ali Bashi Formation, Zal Member, upper view; (g) Clarkina subcarinata (Sweet in Teichert et al., 1973), FUM no. AJ165-7, Ali Bashi Formation, Zal Member, upper view; (h) Clarkina deflecta (Wang and Wang, 1981a), FUM no. AJ177-14, Ali Bashi Formation, Paratirolites Limestone, upper view; (i) Clarkina bachmanni Kozur, 2004, FUM no. AJ185-23, Ali Bashi Formation, Paratirolites Limestone, upper view; (j) Clarkina nodosa Kozur, 2004, FUM no. AJ190-7, Ali Bashi Formation, Paratirolites Limestone, upper view; (k) Clarkina yini Mei, 1998b, FUM no. AJ192-5, Ali Bashi Formation, Paratirolites Limestone, upper view; (l) Clarkina tulongensis (Tian, 1982), FUM no. AJ198-4, Ali Bashi Formation, Paratirolites Limestone, upper view; (m) Clarkina abadehensis abadehensis Ghaderi, 2014, FUM no. AJ198-13, Ali Bashi Formation, Paratirolites Limestone, upper view; (n) Clarkina abadehensis iranica Ghaderi, 2014, FUM no. AJ198-9, Ali Bashi Formation, Paratirolites Limestone, upper view; (o) Clarkina hauschkei Kozur, 2004, FUM no. AJ200-77, Ali Bashi Formation, Paratirolites Limestone, upper view; (p) Clarkina taylorae (Orchard et al., 1994), FUM no. AJ198-21, Ali Bashi Formation, Paratirolites Limestone, upper view; (q) Clarkina cf. chengyuanensis, FUM no. AJI195-23, Ali Bashi Formation, Paratirolites Limestone, upper view.