Oxynotus crochardi
Welton, 1981
Classification: Elasmobranchii Squaliformes Oxynotidae
Reference of the original description
A new species of Oxynotus Rafinesque 1810 (Chondrichthyes: Squalidae) from the Early Miocene (Saucesian) Jewett Sand, Kern County, California, U.S.A. Tertiary Research, 3(3), 141–152
A new species of Oxynotus Rafinesque 1810 (Chondrichthyes: Squalidae) from the Early Miocene (Saucesian) Jewett Sand, Kern County, California, U.S.A. Tertiary Research, 3(3), 141–152
Description:
Citation: Oxynotus crochardi Welton, 1981: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 12/2024
Description
Original diagnose after Welton (1981) p. 142 [2518]: A species of Oxynotus based upon isolated oral teeth differing from Oxynotus bruniensis, O. caribbaeus, O. centrina, and O. paradoxus by having an apicobasally shorter medial tooth (/M1) with a narrower and higher crown, more lingually convex lateral blades, a labial flange which is broader than in O. paradoxus and narrower and shorter than in O. caribbaeus and O. centrina, a lingual transverse groove shorter than in O. caribbaeus and O. centrina, and differing from O. centrina, O. caribbaeus, and O. paradoxus by possession of a strong median sulcus on the basal edge of the labial flange above the transverse notch.
Original diagnose after Welton (1981) p. 142 [2518]: A species of Oxynotus based upon isolated oral teeth differing from Oxynotus bruniensis, O. caribbaeus, O. centrina, and O. paradoxus by having an apicobasally shorter medial tooth (/M1) with a narrower and higher crown, more lingually convex lateral blades, a labial flange which is broader than in O. paradoxus and narrower and shorter than in O. caribbaeus and O. centrina, a lingual transverse groove shorter than in O. caribbaeus and O. centrina, and differing from O. centrina, O. caribbaeus, and O. paradoxus by possession of a strong median sulcus on the basal edge of the labial flange above the transverse notch.
References
Of teeth and trees: A fossil tip-dating approach to infer divergence times of extinct and extant squaliform sharks. Zoologica Scripta, 47(5), 539–557
DOI: 10.1111/zsc.12299
Fossil record and origin of squaliform sharks (Chondrichthyes, Neoselachii). In Gallucci, V.F. & McFarlane, G.A. & Bargmann, G.G. (Eds). Biology and management of dogfish sharks. American Fisheries Society. Bethesda, Maryland: 19–38
A new species of Oxynotus Rafinesque 1810 (Chondrichthyes: Squalidae) from the Early Miocene (Saucesian) Jewett Sand, Kern County, California, U.S.A. Tertiary Research, 3(3), 141–152
Of teeth and trees: A fossil tip-dating approach to infer divergence times of extinct and extant squaliform sharks. Zoologica Scripta, 47(5), 539–557
DOI: 10.1111/zsc.12299
Fossil record and origin of squaliform sharks (Chondrichthyes, Neoselachii). In Gallucci, V.F. & McFarlane, G.A. & Bargmann, G.G. (Eds). Biology and management of dogfish sharks. American Fisheries Society. Bethesda, Maryland: 19–38
A new species of Oxynotus Rafinesque 1810 (Chondrichthyes: Squalidae) from the Early Miocene (Saucesian) Jewett Sand, Kern County, California, U.S.A. Tertiary Research, 3(3), 141–152
