Cretasquatina americana

MAISEY, EHRET & DENTON, 2020


Classification: Elasmobranchii Squatiniformes Squatinidae

Reference of the original description
MAISEY, J.G. & EHRET, D.J. & DENTON, J.S.S. (2020)
A New Genus of Late Cretaceous Angel Shark (Elasmobranchii; Squatinidae), with Comments on Squatinid Phylogeny. American Museum Novitates, 3954: 1-29

Types
Cretasquatina americana
Holotype: ALMNH: 2792;

Images of types

Description:


Citation: Cretasquatina americana MAISEY, EHRET & DENTON, 2020: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 06/2021

Please send your images of "Cretasquatina americana" to info@shark-references.com

Cretasquatina americana gen. nov., sp. nov. Holotype, ALMNH 2792-C, six associated vertebrae forming the anterior vertebral complex: A, dorsal view; B, ventral view; C, anterior views of centra 1–6; D, posterior views of centra 1–6. © Maisey et al. (2020)

Description
Original diagnose after Maisey et al. (2020) p. 6 [28570]: Squatinid elasmobranch in which only the anteriormost two basiventrals of the vertebrae are expanded laterally. First basiventral process much broader distally than proximally, with rounded distal extremities and strongly recurved posterior borders surrounding the second basiventral and almost reaching the third centrum. Second basiventral process sharply angled posterolaterally, straight sided and slightly tapered distally. First vertebra with a vestigial anterior vertebral spool completely enclosed by the first basiventrals, notochordal canal does not reach anterior surface of first basiventral cartilage. Vertebral centra increase in width to centrum 5, then decrease in width. Palatoquadrate orbital process with smoothly rounded apex formed in tessellated cartilage and with a slight anterior projection on its anterolateral surface. Jaws smaller relative to the size of the occipital region than in other squatinids. Teeth unknown.

Remarks
type species of Cretasquatina Maisey et al., 2020 p. 285 [28570] by original designation (Art. 68.2 ICZN);

valid after Maisey et al. (2020) p. 6 [28570];


References
MAISEY, J.G. & EHRET, D.J. & DENTON, J.S.S. (2020)
A New Genus of Late Cretaceous Angel Shark (Elasmobranchii; Squatinidae), with Comments on Squatinid Phylogeny. American Museum Novitates, 3954: 1-29
DOI: 10.1206/3954.1