Diprosopovenator hilperti

STUMPF, SCHEER & KRIWET, 2019


Classification: Elasmobranchii Carcharhiniformes Pseudoscyliorhinidae

Reference of the original description
STUMPF, S. & SCHEER, U. & KRIWET, J. (2019)
A new genus and species of extinct ground shark, †Diprosopovenator hilperti, gen. et sp. nov. (Carcharhiniformes, †Pseudoscyliorhinidae, fam. nov.), from the Upper Cretaceous of Germany. Journal of Vertebrate Paleontology, 39 (2): e1593185

Types
Diprosopovenator hilperti
Holotype: RE: A 4872/1+2;


Description:


Citation: Diprosopovenator hilperti STUMPF, SCHEER & KRIWET, 2019: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 06/2021

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Description
Original diagnose after Stumpf et al. (2019) p. 2-3 [27281]: †Pseudoscyliorhinid shark showing the following unique combination of morphological characters: presence of a supraorbital crest above the orbit; possession of an antorbital and postorbital wall delimiting the orbit anteriorly and posteriorly, respectively; presence of a small postorbital process and a distinct sphenopterotic ridge; Meckel’s cartilage rather slender and anteroposteriorly elongated; vertebrae of cyclospondylic type and strongly hourglass-shaped without ornamentation; orthodont-type teeth; tooth crown with prominent, lingually inclined main cusp that is flanked by a single pair of short, pointed lateral cusplets; cusp and lateral cusplets with continuous, weakly developed cutting edges; absence of tooth crown ornamentation; teeth of lateral and posterior positions with distally inclined main cusp forming oblique cutting edges that reach about one-third of the way to the apex of the cusp; oblique grooves on the labial face of the crown; root low with hemiaulacorhize vascularization pattern; basal face of the root very flat and strongly flared, exhibiting a roughly semicircular to oval outline in basal view; lingual protuberance of the root rounded and weakly developed; and labial face of the root with grooves, furrows, and small foramina, especially along the labial basal edge of the root, and with a central basally open notch that gives rise to a slit-like, deeply incised mediolabial groove on the basal face of the root.

Remarks
type species of Diprosopovenator Stumpf et al., 2019 p. 2 [27281] by original designation (Art. 68.2 ICZN);

valid after Stumpf et al. (2019) p. 2 [27281];


References
BERRELL, R.W. & BOISVERT, C. & TRINAJSTIC, K. & SIVERSSON, M. & ALVARADO-ORTEGA, J. & CAVIN, L. & SALISBURY, S.W. & KEMP, A. (2020)
A review of Australia’s Mesozoic fishes. Alcheringa, in press
DOI: 10.1080/03115518.2019.1701078
STUMPF, S. & SCHEER, U. & KRIWET, J. (2019)
A new genus and species of extinct ground shark, †Diprosopovenator hilperti, gen. et sp. nov. (Carcharhiniformes, †Pseudoscyliorhinidae, fam. nov.), from the Upper Cretaceous of Germany. Journal of Vertebrate Paleontology, 39 (2): e1593185
DOI: 10.1080/02724634.2019.1593185