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Figure 14 in A silicified Early Triassic marine assemblage from Svalbard
Figure 14. Ranges of benthic invertebrate families identified from the base of the Vikinghøgda Formation. Grey bars = range extensions based on this study; black bars = previously known unequivocal ranges of families; dashed lines = ghost ranges. Chang. = Changhsingian. G = Griesbachian, D = Dienerian, Sm = Smithian. Radiometric ages (bottom) after Lehrmann et al. (2006), Galfetti et al. (2007) and Shen et al. (2011). Late Permian mass extinction event is indicated by a vertical dark grey bar.
Figure 13 in A silicified Early Triassic marine assemblage from Svalbard
Figure 13. Sinuarbullina yangouensis (Pan et al., 2003). A, B, lateral views; C, D, views of the protoconch. Scale bars = 1 mm, except D. Note: specimen lost by WJF after photography.
Figure 11 in A silicified Early Triassic marine assemblage from Svalbard
Figure 11. Glabrocingulum parvum sp. nov. A, B, apertural view; A, holotype, NHMUK PI MG 1531; B, paratype, NHMUK PI MG 1518; C–E, NHMUK PI MG 1531; C, lateral view; D, side view of initial whorls; E, apical view; F, apertural view of a larval shell, NHMUK PI MG 1520. Scale bars = 1 mm, except F.
Figure 10. Warthia zakharovi Kaim, 2009. A in A silicified Early Triassic marine assemblage from Svalbard
Figure 10. Warthia zakharovi Kaim, 2009. A, NHMUK PI MG 1502, apertural view; B, C, NHMUK PI MG 1505; B, apertural view; C, lateral view; D, E, NHMUK PI MG 1509; D, lateral view; E, apertural view; F, NHMUK PI MG 1508, apical view; G, H, NHMUK PI MG 1504; G, apical view; H, protoconch. Scale bars = 500 µm, except H.
Figure 8 in A silicified Early Triassic marine assemblage from Svalbard
Figure 8. Unionites aff. subrectus (Bittner, 1901). A, NHMUK PI MB 1246, external view, right valve; B, NHMUK PI MB 1245, external view, left valve; C, NHMUK PI MB 1246, internal view, right valve; D, NHMUK PI MB 1245, internal view, left valve; E, NHMUK PI MB 1195, external view, right valve; F, hinge margin, NHMUK PI MB 1245, left valve; G, hinge margin, NHMUK PI MB 1246, right valve. Scale bars = 1 mm.
Figure 9 in A silicified Early Triassic marine assemblage from Svalbard
Figure 9. Neoschizodus laevigatus (Goldfuss, 1837). A, NHMUK PI MB 1251, external view, left valve; B–G, J, larval shells; B, NHMUK PI MB 1256, external view, right valve; C, NHMUK PI MB 1259, external view, left valve; D, NHMUK PI MB 1257, external view, right valve; E, NHMUK PI MB 1260, internal view, left valve; F, NHMUK PI MB 1258, internal view, left valve; G, NHMUK PI MB 1255, internal view, right valve; H, I, beak of adult specimen, NHMUK PI MB 1251; J, hinge plate of a larval shell, NHMUK PI MB 1260. Scale bars: A = 2 mm; B–G, I = 200 µm; H = 1 mm; J = 50 µm.
Figure 12 in A silicified Early Triassic marine assemblage from Svalbard
Figure 12. Pseudozygopleuridae gen et sp. indet., larval shell. A, B, NHMUK PI MG 1532; A, apertural view; B, lateral view; C, NHMUK PI MG 1533, apical view; D, side view of initial whorl, NHMUK PI MG 1532. Scale bars = 100 µm.
Figure 5 in A silicified Early Triassic marine assemblage from Svalbard
Figure 5. Austrotindaria antiqua sp. nov. A, holotype, NHMUK PI MB 1240, external view, right valve; B, paratype, NHMUK PI MB 1241, external view, right valve; C, holotype, NHMUK PI MB 1240, internal view, right valve; D, NHMUK PI MB 1191, external view, right valve; E, NHMUK PI MB 1199, external view, left valve; F, NHMUK PI MB 1196, external view, right valve; G, NHMUK PI MB 1242, hinge plate of left valve; H, NHMUK PI MB 1194, dorsal view, right valve; I, articulated specimen, NHMUK PI MB 1243; J, larval shell, NHMUK PI MB 1244, left valve. Scale bars: A–C, G = 500 µm; D–F = 1 mm; I, J = 100 µm.
Figure 6 in A silicified Early Triassic marine assemblage from Svalbard
Figure 6. Austrotindaria svalbardensis sp. nov. A, paratype, NHMUK PI MB 1231, external view, left valve; B, holotype, NHMUK PI MB 1223, external view, right valve; C, NHMUK PI MB 1190, left valve, external view; D, larval shell, NHMUK PI MB 1234, external view, right valve; E, NHMUK PI MB 1225, internal view, left valve; F, NHMUK PI MB 1227, internal view, left valve; G, larval shell, NHMUK PI MB 1237, internal view, right valve; H, paratype, posterior and anterior hinge plate junction, NHMUK PI MB 1231. Scale bars = 500 µm.
Figure 7 in A silicified Early Triassic marine assemblage from Svalbard
Figure 7. Malletiidae gen et sp. indet., larval shells. A, NHMUK PI MB 1249, external view; B, NHMUK PI MB 1249, internal view; C, NHMUK PI MB 1248, internal view. Scale bars = 100 µm.
Figure 4 in A silicified Early Triassic marine assemblage from Svalbard
Figure 4. Nucinella nakremi sp. nov. A, holotype, NHMUK PI MB 1219, external view, left valve; B, paratype, NHMUK PI MB 1220, external view, left valve; C, holotype, NHMUK PI MB 1219, interior view, left valve; D, paratype, NHMUK PI MB 1220, interior view (transposed hinge), left valve. Scale bars = 500 µm.
Figure 3 in A silicified Early Triassic marine assemblage from Svalbard
Figure 3. Nucinella taylori sp. nov. A, holotype, NHMUK PI MB 1206, external view, left valve; B, paratype, NHMUK PI MB 1209, external view, right valve; C, paratype, NHMUK PI MB 1210, internal view, right valve; D, holotype, NHMUK PI MB 1206, internal view, left valve; E, F, paratype, NHMUK PI MB 1209, internal view, right valve; G–J, prodissoconchs of N. taylori; G, NHMUK PI MB 1213, external view, left valve; H, NHMUK PI MB 1211, external view, right valve; I, NHMUK PI MB 1214, internal view, left valve; J, NHMUK PI MB 1211, internal view, right valve. Scale bars: A–F = 500 µm; G–J = 100 µm.
Figure 1 in A silicified Early Triassic marine assemblage from Svalbard
Figure 1. Locality and stratigraphy of the studied section in Lusitaniadalen. A, locality map of the Lusitaniadalen section; B, palaeogeographical position; C, stratigraphical column indicating the position of the sampled concretionary levels (LD-04 and LD-05) and disappearance of bioturbation associated with marine ecosystem collapse and the Late Permian mass extinction (LPE; modified from Nabbefeld et al. 2010). Abbreviations: KSF, Kapp Starostin Formation; ii, ichnofabric index. Palaeogeography after Blakey (2012).
Figure 2. A in A silicified Early Triassic marine assemblage from Svalbard
Figure 2. A, Orbiculoidea winsnesi Gobbet, 1963, NHMUK PI BE 3238, dorsal view, dorsal valve; B, Austrotindaria? canalensis (Catullo, 1846), NHMUK PI MB 1198, external view, left valve; C–G, Promyalina schamarae (Bittner, 1899), external view; C, D, NHMUK PI MB 1204; C, right valve; D, left valve. E, F, NHMUK PI MB 1203; E, right valve; F, left valve. G, NHMUK PI MB 1202, right valve. Scale bars: A, B, G = 2 mm, C–F = 1 mm.
Figure 5 in A new aetosaur (Archosauria: Pseudosuchia) from the upper Blue Mesa Member (Adamanian: Early-Mid Norian) of the Late Triassic Chinle Formation, northern Arizona, USA, and a review of the paratypothoracin Tecovasuchus across the southwestern USA
Figure 5. Revised regional occurrences of Tecovasuchus chatterjeei across the Chinle Formation and Dockum Group of the southwestern United States (modified from Martz 2008 and Heckert et al. 2007). Abbreviations: AZ=Arizona, NM=New Mexico, TX=Texas.
Figure 1 in A new aetosaur (Archosauria: Pseudosuchia) from the upper Blue Mesa Member (Adamanian: Early-Mid Norian) of the Late Triassic Chinle Formation, northern Arizona, USA, and a review of the paratypothoracin Tecovasuchus across the southwestern USA
Figure 1. Stratigraphic position in the Chinle Formation (A) of PFV 456 and the Placerias and Downs Quarries in Arizona (modified from Reyes et al. 2020 and Kligman et al. 2023), and their geographic occurrence (B). U-Pb ages based on Ramezani et al. (2014) and Rasmussen et al. (2020). Abbreviations: AZ=Arizona; PEFO=Petrified Forest National Park; Tr.=Triassic.
Figure 3. A in A new aetosaur (Archosauria: Pseudosuchia) from the upper Blue Mesa Member (Adamanian: Early-Mid Norian) of the Late Triassic Chinle Formation, northern Arizona, USA, and a review of the paratypothoracin Tecovasuchus across the southwestern USA
Figure 3. A. Holotype paramedian osteoderm of Kryphioparma caerula gen. et sp. nov. in comparison to that of other stagonolepidoid taxa documented within the Placerias Quarry and PFV 456, UCMP 165173. B. Desmatosuchus, PEFO 49568. C. Calypotosuchus wellesi, PEFO 46222. Orientation: All in dorsal view. Abbreviations: Ant.=Anterior, Ant. bar=Anterior bar, Ant. lam.=Anterior lamina, Dors. em.=Dorsal eminence. Small, unlabeled arrows indicate lateral direction.
Figure 16 in The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny
Figure 16. Phylogeny of Rhynchocephalia, recovered from: A, strict consensus tree from the maximum parsimony analysis with Bremer values above 1 labelled beside the nodes; and B, 50% majority rule consensus tree from the Bayesian-inference analysis with clade credibility values (decimal proportions) labelled beside nodes.
Figure 13 in The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny
Figure 13. The braincase and cervical vertebra of Microsphenodon bonapartei gen. et sp. nov. (UFRGS-PV-0972-T). A–F, nearcomplete braincase in: A, anterior; B, posterior; C, left lateral; D, right lateral; E, dorsal; and F, ventral views. G–K, fragments of the axis and atlas in: G, right lateral; H, left lateral; I, ventral; J, dorsal; and K, posterior views. Abbreviations: at, atlas; ax, axis; bo, basioccipital; bs, basisphenoid; car. for, carotid foramen; cen, centrum; cul. proc, cultriform process; eo, exoccipital; int, intercentrum; ne. arch, neural arch; ocon, occipital condyle; op, opisthotic; par, paroccipital; pila, pila antotica; pr, prootic; proc, process; ps, parasphenoid; so, supraoccipital. Scale bars for A–F equal 5 mm; G–K equal 1 mm.
Figure 9 in The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny
Figure 9. Cranial material of Microsphenodon bonapartei gen. et sp. nov. (A, UFRGS-PV-0972-T; B, C, UFRGS-PV-0613-T; D, E, UFRGS-PV-0827-T; F, UFRGS-PV-0848-T). A, left lateral view of the holotype near-complete skull UFRGS-PV-0972-T. B, C, partial skull of UFRGS-PV-0613-T in: B, left lateral; and C, ventral views. D, E, right palatine UFRGS-PV-0827-T in: D, right lateral; and E, ventral views. F, medial view of left dentary UFRGS-PV-0848-T. Scale bars equal 5 mm.
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