旺财体育 hunterweeks.com Copyright of the Crown in Canada" /> Figures & data: A New Ladinian Nothosauroid (Sauropterygia) from Fuyuan, Yunnan Province, China

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Figures & data

FIGURE 1. A, schematic map of the fossil locality. B, stratigraphic logs showing the geological section measured near Jiyangshan quarry (left), Fuyuan County, Yunnan, and a synthesis of the section (right) of the Zhuganpo Member of the Falang Formation modified from the left log of Sun et al. (2016 Sun, Z.-Y. , D.-Y.Jiang, C.Ji, and W.-C.Hao . 2016. Integrated biochronology for Triassic marine vertebrate faunas of Guizhou Province, South China. Journal of Asian Earth Sciences 118:101110. doi: 10.1016/j.jseaes.2016.01.004 [Crossref], [Web of Science ®],聽:fig. 4). Stars indicate the strata from which specimens of Brevicaudosaurus jiyangshanensis, gen. et sp. nov., were collected. Abbreviation: Fm., Formation.

FIGURE 2. Brevicaudosaurus jiyangshanensis, gen. et sp. nov., skeletons in dorsal view. A, IVPP V 18625, holotype; B, IVPP V 26010, referred specimen.

FIGURE 3. Brevicaudosaurus jiyangshanensis, gen. et sp. nov., IVPP V 18625, photographs and outlines of the skull and the mandible in dorsal view. A, B, IVPP V 18625, holotype, in dorsal view; C, D, IVPP V 26010, referred specimen, snout portion of the skull. Zigzag lines indicate broken areas. Abbreviations: art, articular; bo, basioccipital; cqp, cranio-quadrate passage; d, dentary; ec, ectopterygoid; eo, exoccipital; f, frontal; j, jugal; m, maxilla; n, nasal; op, opisthotic; or, orbit; p, parietal; pf, prefrontal; pl, palatine; pm, premaxilla; po, postorbital; pof, postfrontal; pt, pterygoid; q, quadrate; qj, quadratojugal; rap, retroarticular process; sa, surangular; so, supraoccipital; sq, squamosal; st, stapes.

FIGURE 4. Brevicaudosaurus jiyangshanensis, gen. et sp. nov., IVPP V 18625, occipital and anterior cervical regions in dorsal view. Abbreviations: art, articular; at.a, atlantal neural arch; at.c, atlantal centrum; ax.a, axial neural arch; bo, basioccipital; cqp, cranio-quadrate passage; eo, exoccipital; op, opisthotic; p, parietal; p.at, proatlas; prq, pterygoid ramus of quadrate; q, quadrate; qj, quadratojugal; rap, retroarticular process; so, supraoccipital; sq, squamosal; st, stapes.

FIGURE 5. Brevicaudosaurus jiyangshanensis, gen. et sp. nov., IVPP V 18625, cervical region in dorsal view. Zigzag lines indicate broken areas. Abbreviations: cv, cervical vertebra; dv, dorsal vertebra; poz, postzygapophysis; prz, prezygapophysis.

FIGURE 6. Brevicaudosaurus jiyangshanensis, gen. et sp. nov., IVPP V 18625. A, photograph and B, outline of dorsal vertebrae 3 and 4; photographs showing C, the trunk and the sacrum and D, the caudal vertebrae in dorsal view. Abbreviations: car, caudal rib; cr, cervical rib; dr, dorsal rib; dv, dorsal vertebra; dv.c, dorsal vertebral centrum; np, neural spine; poz, postzygapophysis; prz, prezygapophysis; sr, sacral rib; zph, zygosphene; zyg, zygantrum.

FIGURE 7. Brevicaudosaurus jiyangshanensis, gen. et sp. nov., A, B, E, pectoral and B, F, pelvic girdles in dorsal views. AD, IVPP V 18625; E, F, IVPP V 26010. Zigzag lines indicate broken areas. Abbreviations: car, caudal rib; cl, clavicle; clp, clavicle process; co, coracoid; cof, coracoid foramen; cv, cervical vertebra; dr, dorsal rib; dbsc, dorsal blade of scapula; dv, dorsal vertebra; icl, interclavicle; il, ilium; is, ischium; pu, pubis; sc, scapula; sr, sacral rib.

FIGURE 8. Brevicaudosaurus jiyangshanensis, gen. et sp. nov., IVPP V 18625, A, left and B, right forelimbs. Abbreviations: dc1, dc2, dc3, dc4, distal carpal 1, 2, 3, 4; hu, humerus; im, intermedium; ra, radius; se.b, sesamoid bone; ul, ulna; uln, ulnare; I鈥揤, digits I鈥揤.

FIGURE 9. Brevicaudosaurus jiyangshanensis, gen. et sp. nov., left hind limb. A, IVPP V 18625. B, IVPP V 26010. Abbreviations: as, astragalus; ca, calcaneum; dt3鈥+鈥4, distal tarsal 3鈥+鈥4; fe, femur; fi, fibula; mt4, mt5, metatarsal 4, 5; ti, tibia; u.p, ungual phalanx.

TABLE 1. Measurements (in mm) of selected elements of the holotype, IVPP V 18625, and the referred specimen, IVPP V 26010, of Brevicaudosaurus jiyangshanensis, gen. et sp. nov. Abbreviations: e, estimated; L, left; R, right.

FIGURE 10. Strict consensus of 14 MPTs depicting the phylogenetic relationships of Brevicaudosaurus. Archosauriformes, Choristodera, Prolacertiformes, Rhynchosauria, and Trilophosaurus are summarized as Archosauromorpha. Kuehneosauridae, Rhynchocephalia, and Squamata are consolidated here as Lepidosauromorpha. Numbers by each clade represent Bremer support values (left) and bootstrap support values (right), respectively. Abbreviations: Anaro , Anarosaurus; Dactylo , Dactylosaurus; Largo-polycarpon , Largocephalosaurus polycarpon; Largo-qianensis , Largocephalosaurus qianensis; Neustico , Neusticosaurus; Serpiano , Serpianosaurus.

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