Vallisia coppi

DUFFIN, 1982


Classification: Elasmobranchii incert. sedis incert. fam.

Reference of the original description
DUFFIN, C.J. (1982)
Teeth of a new selachian from the Upper Triassic of England. Neues Jahrbuch für Geologie und Paläontologie, Monatshefte, 1982 (3): 156–166

Types
Vallisia coppi
Holotype: BRSMG: Cc400;


Description:


Citation: Vallisia coppi DUFFIN, 1982: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 03/2021

No image available.
Please send your images of "Vallisia coppi" to
info@shark-references.com

Description
Original diagnose after Duffin (1982) p. 159 [708]: A neoselachian shark known only from isolated teeth. The teeth measure up to 2.5 mm high and comprise a robust crown with a large central cusp flanked by up to two lateral cusplets on each side. The cusp and cusplets are upright to moderately lingually inclined. The crown lacks ornament. The basal flange is weak to moderate and overhangs the crown/root junction labially. A marked lip is present around the whole tooth at the top of the crown shoulder. The root is a third of the crown height and comprises a flat to convex basal face with one or occasionally two median canals crossing it labiolingually. The canals may be partially roofed or open basally. An apically-directed prominent vascular foramen occupies a variable position in the floor of the median canal. Numerous small vascular foramina are located on the labial, lingual and basal root faces. The root directly underlies the crown and is only mildly lingually offset.

Remarks
type species of Vallisia Duffin, 1982 p. 159 [708] by original designation (Art. 68.2 ICZN);

valid after Duffin (1982) p. 159 [708]; Ronan et al. (2020) p. 585 [29079];


References
RONAN, J. & DUFFIN, C.J. & HILDEBRANDT, C. & PARKER, A. & HUTCHINSON, D. & COPP, C. & BENTON, M.J. (2020)
Beginning of Mesozoic marine overstep of the Mendips: The Rhaetian and its fauna at Hapsford Bridge, Vallis Vale, Somerset, UK. Proceedings of the Geologists' Association, 131 (5): 578-594
MEARS, E.M. & ROSSI, V. & MACDONALD, E. & COLEMAN, G. & DAVIES, T.G. & ARIAS-RIESGO, C. & HILDEBRANDT, C. & THIEL, H. & DUFFIN, C.J. & WHITESIDE, D.I. & BENTON, M.J. (2016)
The Rhaetian (Late Triassic) vertebrates of Hampstead Farm Quarry, Gloucestershire, UK. Proceedings of the Geologists' Association, 127 (4): 478–505
DOI: 10.1016/j.pgeola.2016.05.003
ALLARD, H. & CARPENTER, S.C. & DUFFIN, C.J. & BENTON, M.J. (2015)
Microvertebrates from the classic Rhaetian bone beds of Manor Farm Quarry, near Aust (Bristol, UK). Proceedings of the Geologists' Association, 126 (6): 762–776
DOI: 10.1016/j.pgeola.2015.09.002
GINTER, M. & HAMPE, O. & DUFFIN, C.J. (2010)
Handbook of Paleoichthyology, Vol. 3D: Chondrichthyes Paleozoic Elasmobranchii: Teeth Verlag Dr. Friedrich Pfeil, pp. 168, 154 fig., 4 Tab.
DELSATE, D. (1993)
Synthèse des faunes d'élasmobranches du Trias et du Jurassique de Lorraine. Cossmanniana, Hors–série 2: 52–55
DELSATE, D. & LEPAGE, J.-C. (1991)
Requins et raies en Lorraine. Geolor Magazine, 3: 6–9
DUFFIN, C.J. & COUPATEZ, P. & LEPAGE, J.-C. & WOUTERS, G. (1983)
Rhaetian (Upper Triassic) marine faunas from “Le golfe du Luxembourg” in Belgium (preliminary note). Bulletin de la Societe Belge de Geologie, 92 (4): 311–315, 4 figs., 1 table
DUFFIN, C.J. (1982)
Teeth of a new selachian from the Upper Triassic of England. Neues Jahrbuch für Geologie und Paläontologie, Monatshefte, 1982 (3): 156–166