Rhinoptera daviesi

Woodward, 1889


Classification: Elasmobranchii Myliobatiformes Rhinopteridae

Reference of the original description
Woodward, A.S. (1889)
Catalogue of the fossil fishes in the British Museum. Part. I. British Museum(Natural History): 474 p., fig., 17 pl.

Types
Rhinoptera daviesi
Holotype: NHMUK: PV P 1514;

Images of types

Description:


Citation: Rhinoptera daviesi Woodward, 1889: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 12/2021

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Rhinoptera daviesii sp. nov.; portion of dentition, coronal aspect and section. London Clay; Isle of Sheppey. [P. 1514]

Description
Original description of Woodward, 1889 [2593]: Rhinoptera daviesii, sp. nov.
Type. Portion of dentition (PI. III. figs. 6, 6 a); British Museum.
Teeth transversely channelled, arranged in nine antero-posterior series. Each tooth of the median row is about four times as broad as long; the teeth of the first and second lateral rows are also much transversely elongated, being respectively about three and two-and-a-half times as broad as long; the teeth of the two outer rows are slightly broader than long.
Form. g Loc. London Clay (Lower Eocene): Isle of Sheppey.
P. 1514:. Type specimen, generically determined by Mr. William Davies. The fossil consists of a large portion of the dentition with parts of the pterygo-quadrate and mandibular cartilages, embedded in hard clay. The teeth of one jaw are much scattered and displaced, but those of the other are scarcely disturbed, being shown in transverse section surrounding the cartilage, and more than half exposed from above. The upper aspect of the dentition, as far as preserved, is shown of the natural size in PI. III. fig. 6; the crowns of the teeth have the appearance of being channelled in the direction of their long axes, and they exhibit a curious mode of interlocking antero-posteriorly, well seen in the transverse fracture (PI. III. fig. 6 a). The dental crown is thin and its lower portion is produced into a projecting ridge anteriorly, which fits into a corresponding groove upon the posterior face of the tooth immediately in front, and is firmly held by a email projecting ledge apparently from the root of that tooth. Such an arrangement has already been described by Agassiz in R. studeri (Poiss. Foss. vol IIl. p. 333, pl. R. fig. 4). The root exhibits the usual antero-posterior grooves and ridges.

Remarks
valid after Leriche (1922) p. 181 [1437]; Case (1980) p. 94 [390];

synonym of Burnhamia daviesi after Ebersole et al. (2019) p. 144 [27789];


References
Hovestadt, D.C. & Hovestadt-Euler, M. (2013)
Generic Assessment and Reallocation of Cenozoic Myliobatinae based on new information of tooth, tooth plate and caudal spine morphology of extant taxa. Palaeontos, 24, 1–66
Kruckow, T. & Thies, D. (1990)
Die Neoselachier der Paleokaribik (Pisces: Elasmobranchii). Courier Forschungsinstitut Senckenberg, 119: 1–102
Case, G.R. (1981)
Late Eocene selachians from South-central Georgia. Palaeontographica, Abt. A, 176(1–3), 52–79
Case, G.R. (1980)
A selachian fauna from the Trent Formation, Lower Miocene (Aquitanian) of Eastern North Carolina. Palaeontographica, Abt. A, 171(1–3), 75–103
Taverne, L. & Nolf, D. (1978)
Troisième note sur les poissons des sables de lede (Eocène belge): Les fossiles autres que les Otholithes. Bulletin de la Société Belge de Géologié, 87(3): 125–152, 26 fig.
Casier, E. (1966)
Faune ichthyologique du London Clay. Trustees of the British Museum: 496 pp., 82 fig., 68 pl.
Glikman, L.S. (1964)
(Sharks of Paleogene and their stratigraphic significance). «in russian». Nauka Press: 229 p., 76 fig., 31 pl. Moscou.
Arambourg, C. (1952)
Les vertébrés fossiles des gisements de phosphates (Maroc-Algérie-Tunisie). Notes et Mémoires du Service Géologique du Maroc, 92: 1–372, 62 fig., 44 pl.
Casier, E. (1947)
Constitution et évolution de la racine dentaire des Euselachii. II. Étude comparative des types. Bulletin du Musée Royal d'Histoire Naturelle de Belgique, 23(14): 1–32, 10 fig., 5 pl.
Casier, E. (1946)
La faune ichthyologique de l'Yprésien de la Belgique. Mémoires du Musée Royal d'Histoire Naturelle de Belgique, 104: 1–267, 19 fig., 6 pl.
Leriche, M. (1922)
Les poissons paléocènes et éocènes du Bassin de Paris (Note additionnelle). Bulletin de la Société géologique de France, (Serie 4), 22, 177–200
Priem, M.F. (1908)
Etude des poissons fossiles du Bassin Parisien. Annales de Paléontologie, 1–144
Leriche, M. (1906)
Contribution à lètude des poisons fossils du Nord de la France et des regions voisines. Mémoires de la Société géologique du Nord, 5: 430 pp
Leriche, M. (1905)
Les poissons éocènes de la Belgique. Mémoires du Musée Royal d'Histoire Naturelle de Belgique, 3(11): 49–228, pl. 4–12.
Woodward, A.S. (1899)
Notes on the teeth of sharks and skates from English Eocene formations. Proceedings of the Geologists' Association, 16(1), 1–14, pl. 1.
DOI: 10.1016/S0016-7878(99)80036-4