Pristiophorus atavus
(Woodward, 1889)
Classification: Elasmobranchii Pristiophoriformes Pristiophoridae
Reference of the original description
Catalogue of the fossil fishes in the British Museum. Part. I. British Museum (Natural History): 474 p., fig., 17 pl.
Catalogue of the fossil fishes in the British Museum. Part. I. British Museum (Natural History): 474 p., fig., 17 pl.
Types
Pristiophorus atavus
Pristiophorus atavus
Description:
Citation: Pristiophorus atavus (Woodward, 1889): In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 12/2024
Description
Original description of Woodward, 1889 [2593]:
Type. Imperfect rostrum, shown in Pl. III. fig. 1. Each rostral tooth comprises e. high round base, crimped, and having. somewhat stellate appearance when viewed from beneath; upon this is fixed e. backwardly-directed enamelled "crown," compressed to an anterior and posterior sharp edge. These teeth are arranged in single series upon each lateral margin of the snout, increasing considerably in size towards the anterior extremity; miniature tubercles, of the same kind, are also placed upon the upper surface of the base of the snout. Form. 4- Loc. Upper Cretaceous (Turonian): Sahel Alma, Mount Lebanon, Syria.
P. 4776. Type specimen. The snout is broken away from the head at the level of the nasal capsules, and only one of these is imperfectly displayed. The outline of the skin is indicated by the marginal series of pointed dermal tubercles, which become considerably enlarged anteriorly, and merit the name of ''rostral teeth "; the rostral region is thus seen to taper gradually, forming a long flattened blade. The endoskeletal cartilages are much crushed and broken, and at some distance from the base of the snout, where the tapering decreases, they evidently occupy its entire width, from margin to margin. In addition to the ordinary median prolongation of the cranium itself, there is apparently a laterally-placed pair of large cartilage, corresponding to those of the existing Pristis, though it is not possible to determine whether they agree with the latter in structure.
Original description of Woodward, 1889 [2593]:
Type. Imperfect rostrum, shown in Pl. III. fig. 1. Each rostral tooth comprises e. high round base, crimped, and having. somewhat stellate appearance when viewed from beneath; upon this is fixed e. backwardly-directed enamelled "crown," compressed to an anterior and posterior sharp edge. These teeth are arranged in single series upon each lateral margin of the snout, increasing considerably in size towards the anterior extremity; miniature tubercles, of the same kind, are also placed upon the upper surface of the base of the snout. Form. 4- Loc. Upper Cretaceous (Turonian): Sahel Alma, Mount Lebanon, Syria.
P. 4776. Type specimen. The snout is broken away from the head at the level of the nasal capsules, and only one of these is imperfectly displayed. The outline of the skin is indicated by the marginal series of pointed dermal tubercles, which become considerably enlarged anteriorly, and merit the name of ''rostral teeth "; the rostral region is thus seen to taper gradually, forming a long flattened blade. The endoskeletal cartilages are much crushed and broken, and at some distance from the base of the snout, where the tapering decreases, they evidently occupy its entire width, from margin to margin. In addition to the ordinary median prolongation of the cranium itself, there is apparently a laterally-placed pair of large cartilage, corresponding to those of the existing Pristis, though it is not possible to determine whether they agree with the latter in structure.
Remarks
shark-references Species-ID=10566;
synonym of Sclerorhynchus atavus after Woodward (1892) p. 534 [2597]; Cappetta (1980) p. 167 [327]
shark-references Species-ID=10566;
synonym of Sclerorhynchus atavus after Woodward (1892) p. 534 [2597]; Cappetta (1980) p. 167 [327]
References
Ueber die Gattung Pristiophorus. Archiv für Naturgeschichte, 57(1), 15–48
Ueber die Gattung Pristiophorus. Archiv für Naturgeschichte, 57(1), 15–48
