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74 results for “Symmoriiformes”
FIG. 2. — Cosmoselachus mehlingi n. gen., n in A new operculate symmoriiform chondrichthyan from the Late Mississippian Fayetteville Shale (Arkansas, United States)
FIG. 2. — Cosmoselachus mehlingi n. gen., n. sp., three-dimensional renderings of specimen AMNH FF 20509, produced by computed tomographic (CT) scanning: A, ventral view of posterior half of specimen, anterior to top; B, ventral view of anterior part of the specimen, anterior to right, with opercular elements removed; C, dorsal view of anterior half of specimen, anterior to right. Note loss of anterior portion of cranium due to taphonomy. Abbreviations: add, depression potentially for adductor musculature; c, cranium; cb, ceratobranchials; ch, ceratohyals; d, denticles; mc, Meckel's cartilage; op, opercular cartilage; pa f, pharyngeal arch fragments; pq, palatoquadrate fragment; t, teeth. Scale bars: 5 cm.
FIG. 1. — Cosmoselachus mehlingi n. gen., n in A new operculate symmoriiform chondrichthyan from the Late Mississippian Fayetteville Shale (Arkansas, United States)
FIG. 1. — Cosmoselachus mehlingi n. gen., n. sp., specimen AMNH FF 20509, anterior to right: A, entire specimen, ventral view. Abbreviations: mc, Meckel's cartilage; op, opercular flap; B, detail of opercular flap. Scale bars: A, 5 cm; B, 2 cm. Photographs by Lorraine Meeker.
FIG. 6. — Cosmoselachus mehlingi n. gen., n in A new operculate symmoriiform chondrichthyan from the Late Mississippian Fayetteville Shale (Arkansas, United States)
FIG. 6. — Cosmoselachus mehlingi n. gen., n. sp., partial basicranium of specimen AMNH FF 20509: A, dorsal view; B, ventral view. Anterior to top. Abbreviations: da?, possible opening for the dorsal aorta; occ, occiput; ot cap, otic capsule. Scale bar: 3 cm.
Image stack, PLY-files and a NEX-file accompanying: A new symmoriiform from the Late Devonian of Morocco: novel jaw function in ancient sharks
<p>We describe the small chondrichthyan Ferromirum oukherbouchi n.gen. et sp. from the Famennian (Late Devonian) of the Maïder region in Morocco. This chondrichthyan is exceptionally well preserved and displays not only mineralized soft tissues but also undeformed cartilages of the head, gills, and shoulder girdle. A reconstruction of the head using 3D-prints revealed a previously unknown kind of jaw articulation. Here, we make the original cropped image stack and PLY-files of the single cartilaginous elements accessible. Additionally, a nexus-file with the character matrix used for the cladogram shown in the article is included.</p>
Fig. 61. Cladoselache kepleri, CMNH 6233 in The Braincase In Paleozoic Symmoriiform And Cladoselachian Sharks
Fig. 61. Cladoselache kepleri, CMNH 6233, Cleveland Shale, Berea, Ohio. Dorsal view of braincase
Fig. 26 in The Braincase In Paleozoic Symmoriiform And Cladoselachian Sharks
Fig. 26. FMNH PF 13242 (''Cobelodus''). Cranial endocast, dorsal view.
Fig. 27 in The Braincase In Paleozoic Symmoriiform And Cladoselachian Sharks
Fig. 27. FMNH PF 13242 (''Cobelodus''). Cranial endocast, ventral view (also shows aortic canals).
Fig. 29 in The Braincase In Paleozoic Symmoriiform And Cladoselachian Sharks
Fig. 29. FMNH PF 13242 (''Cobelodus''). Cranial endocast, posterior view.
Image stack, PLY-files and a NEX-file accompanying: A new symmoriiform from the Late Devonian of Morocco: novel jaw function in ancient sharks
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Fig. 65 in The Braincase In Paleozoic Symmoriiform And Cladoselachian Sharks
Fig. 65. Views of the right postorbital process showing the different position of the postorbital articulation in: A–C, Notorynchus cepedianus; A, lateral view (anterior to right); B, posterior view; C, ventral view (anterior to top) D, ''Cobelodus'', posterior view; E, Cladodoides wildungensis, posterior view. Not to scale.
Fig. 35 in The Braincase In Paleozoic Symmoriiform And Cladoselachian Sharks
Fig. 35. Transverse CT-scan slice 395 through the midorbital region of the head in a Pennsylvanian symmoriiform from the Fayetteville Shale of Arkansas, OUZC 5300. Note the presence of a thin but continuous interorbital septum between the cranial cavity and the suborbital shelf.
Fig. 56 in The Braincase In Paleozoic Symmoriiform And Cladoselachian Sharks
Fig. 56. Falcatus falcatus MV 5392, part and counterpart, Bear Gulch Limestone. Head. A, dorsolateral view, right side; B, ventrolateral view, left side. From silicone peels, blackened with graphite. Scale bar 5 5 mm.
Fig. 44 in The Braincase In Paleozoic Symmoriiform And Cladoselachian Sharks
Fig. 44. Cobelodus aculeatus FMNH PF 8011. Silicone peel of braincase ventral surface, anterior to top. Scale bar 5 10 mm.
FIG. 4. — Cosmoselachus mehlingi n. gen., n in A new operculate symmoriiform chondrichthyan from the Late Mississippian Fayetteville Shale (Arkansas, United States)
FIG. 4. — Cosmoselachus mehlingi n. gen., n. sp., specimen AMNH FF 20509, pharyngeal denticles (arrowhead) revealed by CT scanning. Anterior to top, ventral view in frontal section. Scale bar: 2 cm.
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