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21 results for “Synechodontiformes”
FIG. 2 in A new partial skeleton of a palaeospinacid shark (Neoselachii, Synechodontiformes) from the Albian of northern France, with a review of the taxonomic history of Early Cretaceous species of Synechodus Woodward, 1888
FIG. 2. — Stratigraphy of the Saint-Pô Formation (middle Albian, Lower Cretaceous) as exposed on the Boulonnais beach between Escalles and Strouanne, northern France (after Robaszynski & Amédro 1986; Amédro 2009); the specimen of Synechodus sp. (IRScNB P.9895) was recovered from between phosphatic horizons P4 and P5.
FIG. 5 in A new partial skeleton of a palaeospinacid shark (Neoselachii, Synechodontiformes) from the Albian of northern France, with a review of the taxonomic history of Early Cretaceous species of Synechodus Woodward, 1888
FIG. 5. — Associated set of isolated dermal denticles of Synechodus sp. (IRScNB P.9895), Saint-Pô Formation (Albian, Lower Cretaceous), Boulonnais beach between Escalles and Strouanne (northern France): from presumed trunk (A-D), fin (E-G) and snout (H) areas, or preserved as cluster (I, J). Scale bars: A-H, 0.5 mm; I, J, 1 mm.
FIG. 1 in A new partial skeleton of a palaeospinacid shark (Neoselachii, Synechodontiformes) from the Albian of northern France, with a review of the taxonomic history of Early Cretaceous species of Synechodus Woodward, 1888
FIG. 1. — Geographical map (A) and Boulonnais beach (B, situation in 1990) between Escalles and Strouanne (northern France); the skeleton of Synechodus sp. (IRScNB P.9895) was collected in 1996 from the clay level exposed at the beach, as indicated by the asterisk (*). Scale bar: B, 500 m.
FIG. 4 in A new partial skeleton of a palaeospinacid shark (Neoselachii, Synechodontiformes) from the Albian of northern France, with a review of the taxonomic history of Early Cretaceous species of Synechodus Woodward, 1888
FIG. 4. — Selected details (in situ) of a partial skeleton of Synechodus sp. (IRScNB P.9895), Saint-Pô Formation (Albian, Lower Cretaceous), Boulonnais beach between Escalles and Strouanne (northern France): A, cluster of anterior teeth; B, cluster of lateral teeth; C, D, patches of dermal denticles; E, precaudal monospondylous vertebrate. Scale bars: A, 250 mm; B, 300 mm; C-E, 150 mm.
FIG. 6 in A new partial skeleton of a palaeospinacid shark (Neoselachii, Synechodontiformes) from the Albian of northern France, with a review of the taxonomic history of Early Cretaceous species of Synechodus Woodward, 1888
FIG. 6. — Associated set of isolated teeth of Synechodus sp. (IRScNB P.9895), Saint-Pô Formation (Albian, Lower Cretaceous), Boulonnais beach between Escalles and Strouanne (northern France): A, anterior; B, antero-lateral; C, D, lateral; E, F, latero-posterior and G, posterior tooth files, in labial (1), lingual (2), occlusal (3) and basal (4) views. Scale bars: A-E, 5 mm; F, 4 mm; G, 2 mm.
FIG. 7 in A new partial skeleton of a palaeospinacid shark (Neoselachii, Synechodontiformes) from the Albian of northern France, with a review of the taxonomic history of Early Cretaceous species of Synechodus Woodward, 1888
FIG. 7. — Micro CT scan of an isolated tooth of Synechodus sp. (IRScNB P.9895), Saint-Pô Formation (Albian, Lower Cretaceous), Boulonnais beach between Escalles and Strouanne (northern France): A, lingual; B, labial; C, basal; D, lateral and E, occlusal views; 3D volume renderings with sagittal (A1-A5), transverse (C1-C2) and frontal (D1-D3) sections showing tooth vascularisation and histology as follows: EN, enameloid; PC, pulp cavity; ORD, orthodentine; OSD, osteodentine; SC, secondary cavities; VC, vascular canaliculi. Scale bar: 1 mm.
FIG. 3. — A in A new partial skeleton of a palaeospinacid shark (Neoselachii, Synechodontiformes) from the Albian of northern France, with a review of the taxonomic history of Early Cretaceous species of Synechodus Woodward, 1888
FIG. 3. — A, Partial skeleton of Synechodus sp. (IRScNB P.9895), Saint-Pô Formation (Albian, Lower Cretaceous), Boulonnais beach between Escalles and Strouanne (northern France); B, Same specimen with interpretation of the exoskeleton (hatching) and the endoskeleton, including parts of the neurocranium (red), splanchnocranium (orange), pelvic girdle (beige) and vertebrate column (yellow). Scale bar: 100 mm.
Figure 10 in Skeletal anatomy of the extinct shark Paraorthacodus jurensis (Chondrichthyes; Palaeospinacidae), with comments on synechodontiform and palaeospinacid monophyly
Figure 10. Pelvic girdle of Paraorthacodus jurensis (SMNS 88987/1). A, specimen as preserved. B, cameralucida drawing. Scale bar = 10 mm. Abbreviations: mtp, metapterygium; pb, puboischiadic bar; pop, propterygium; vc, vertebral column.
Figure 7 in Skeletal anatomy of the extinct shark Paraorthacodus jurensis (Chondrichthyes; Palaeospinacidae), with comments on synechodontiform and palaeospinacid monophyly
Figure 7. Teeth of Paraorthacodus jurensis (SMNS 88987/1). A–B, anterior teeth in labial views. C, anterior teeth in labial (left) and lingual (right) views. D, anterior teeth in lingual views. E–H, lateral teeth in labial views. I–N, lateral teeth in lingual views. O, lateral tooth in basal view. P, lateral tooth in lingual view (left) and posterior tooth in labial view (right). Q–R, posterior teeth in lingual views. S, posterior tooth in labial view (scale bar only for S). All scale bars = 1 mm.
Figure 11 in Skeletal anatomy of the extinct shark Paraorthacodus jurensis (Chondrichthyes; Palaeospinacidae), with comments on synechodontiform and palaeospinacid monophyly
Figure 11. Vertebral column of Paraorthacodus jurensis. A, vertebra in transverse section displaying the characteristic palaeospinacid calcification of the asterospondylic type (holotype, GPIT 1210/1). Scale bar = 5 mm. B, abdominal vertebrae with preserved haemal arches (SMNS 88987/1). Scale bar = 10 mm.
Figure 6 in Skeletal anatomy of the extinct shark Paraorthacodus jurensis (Chondrichthyes; Palaeospinacidae), with comments on synechodontiform and palaeospinacid monophyly
Figure 6. Teeth of the holotype of Paraorthacodus jurensis (GPIT 1210/1). A, parasymphysial teeth (outlined) in labial (bottom) and lingual (top) views. B–D, anterior teeth in labial views. E, anterior tooth in laterobasal view. F, lateral teeth of a single row in labial views. G, lateral teeth in laterobasal, lingual, and labial views (from left to right). H, lateral teeth of a single row in labial views. I, lateral teeth in basal (top) and labial (bottom) views. J–K, lateral teeth in labial views. L–M, anteroposterior teeth in linguobasal views. N, anteroposterior tooth in labial view. O, anteroposterior tooth in labiobasal view. P–Q, posterior teeth in lingual views. R–S, posterior teeth in labial views. T, four posterior-most teeth next to the commissure in labial view. Scale bar = 1 mm.
Figure 14 in Skeletal anatomy of the extinct shark Paraorthacodus jurensis (Chondrichthyes; Palaeospinacidae), with comments on synechodontiform and palaeospinacid monophyly
Figure 14. Diagrammatic sketch of tooth roots of selected synechodontiform sharks in basal view displaying the pseudopolyaulacorhize vascularization pattern (black) and labial root depression (dark grey). A, Welcommia bodeuri, IRSNB P6329. B, Rhomphaidon minor, GPIT without number. C, Sphenodus nitidus, SMNS 80144/5. D, Synechodus dubrisiensis, BMNH 36908 (holotype). E, Paraorthacodus jurensis, GPIT 1210/1 (holotype). Figures not to scale.
Figure 9 in Skeletal anatomy of the extinct shark Paraorthacodus jurensis (Chondrichthyes; Palaeospinacidae), with comments on synechodontiform and palaeospinacid monophyly
Figure 9. Branchial apparatus and pectoral girdle of Paraorthacodus jurensis (SMNS 88987/1). A, specimen as preserved. B, camera-lucida drawing. Scale bar = 10 mm. Abbreviations: bb, basibranchial; cb, ceratobranchial; ch, ceratohyal; co, coracoid bar; eb, epibranchial; gl, glenoid surface; hb, hypobranchial; hm, hyomandibular; mc, Meckel's cartilage; msc, mesocondyle; msp, mesopterygium; mtc, metacondyle; mtp, metapterygium; phb, pharyngobranchial; poc, procondyle; pop, propterygium; pq, palatoquadrate; scc, suprascapular cartilage; scp, scapular process; stc, sternal cartilage; vc, vertebral column.
Figure 12 in Skeletal anatomy of the extinct shark Paraorthacodus jurensis (Chondrichthyes; Palaeospinacidae), with comments on synechodontiform and palaeospinacid monophyly
Figure 12. Dorsal fin of Paraorthacodus jurensis (SMNS 88987/1) as preserved and camera-lucida drawing (inset). Scale bar = 10 mm. Abbreviations: bpg, basal pterygiophore; rpg, radial pterygiophore.
Figure 5 in Skeletal anatomy of the extinct shark Paraorthacodus jurensis (Chondrichthyes; Palaeospinacidae), with comments on synechodontiform and palaeospinacid monophyly
Figure 5. Jaws and hyoid apparatus of Paraorthacodus jurensis (SMNS 88987/1). A, left jaws as preserved. B, camera-lucida drawing of left jaws. C, right jaws as preserved. D, camera-lucida drawing of right jaws. E, hyoid apparatus as preserved. F, camera-lucida drawing of hyoid apparatus. Scale bars = 10 mm. Abbreviations: artcot, articular cotylus; artk, articular knob; artpr, articular process; avlc, anteroventral labial cartilage; ch, ceratohyal; deng, dental groove; denl, dental lamina; denr, dental ridge; ethart, ethmoidal articulation; hm, hyomandibular; mc, Meckel's cartilage; poart, postorbital articulation; pq, palatoquadrate; pvlc, posteroventral labial cartilage; qc, quadrate cavity; qfl, quadrate flange; qjl, lateral quadratomandibular joint; qjm, medial quadratomandibular joint; sym, symphysis.
Figure 4 in Skeletal anatomy of the extinct shark Paraorthacodus jurensis (Chondrichthyes; Palaeospinacidae), with comments on synechodontiform and palaeospinacid monophyly
Figure 4. Skull and pectoral girdle of Paraorthacodus jurensis (SMNS 88987/1). Scale bar = 10 mm.
Figure 1 in Skeletal anatomy of the extinct shark Paraorthacodus jurensis (Chondrichthyes; Palaeospinacidae), with comments on synechodontiform and palaeospinacid monophyly
Figure 1. Map showing the geographical location of Nusplingen in south-western Germany.
Figure 3 in Skeletal anatomy of the extinct shark Paraorthacodus jurensis (Chondrichthyes; Palaeospinacidae), with comments on synechodontiform and palaeospinacid monophyly
Figure 3. Complete articulated specimen of Paraorthacodus jurensis (SMNS 88987/1). Scale bar = 50 mm.
Figure 15 in Skeletal anatomy of the extinct shark Paraorthacodus jurensis (Chondrichthyes; Palaeospinacidae), with comments on synechodontiform and palaeospinacid monophyly
Figure 15. Tentative reconstruction of upper and lower dentition of Paraorthacodus jurensis displaying the dentition pattern, heterodonty, and sexual dimorphism. A, gender 1 (GPIT 1210/1, holotype). B, gender 2 (SMNS 88987/1). I, parasymphyseal tooth; II–III, anterior teeth; IV–VI, lateral teeth; VII–XI, posterior teeth; XII, commissural tooth. Figures not to scale.
Figure 13 in Skeletal anatomy of the extinct shark Paraorthacodus jurensis (Chondrichthyes; Palaeospinacidae), with comments on synechodontiform and palaeospinacid monophyly
Figure 13. Caudal fin of Paraorthacodus jurensis (SMNS 88987/1). A, specimen as preserved. B, camera-lucida drawing. Scale bar = 10 mm. Abbreviations: ecr, epichordal rays; ha, haemal arch; hcr, hypochordal rays; hsp, haemal spine; na, neural arch; nsp, neural spine; v, vertebra; vc, vertebral column.
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