Asteracanthus dunaii

SZABÓ & FŐZY, 2020


Classification: Elasmobranchii Hybodontiformes Acrodontidae

Reference of the original description
SZABÓ, M. & FŐZY, I. (2020)
Asteracanthus (Hybodontiformes: Acrodontidae) remains from the Jurassic of Hungary, with the description of a new species and with remarks on the taxonomy and paleobiology of the genus. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen Band, 297 (3): 295 - 309

Types
Asteracanthus dunaii
Holotype: NHMUS: PAL 2020.2.1;

Images of types

Description:


Citation: Asteracanthus dunaii SZABÓ & FŐZY, 2020: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 01/2021

Please send your images of "Asteracanthus dunaii" to info@shark-references.com

Asteracanthus dunaii SZABÓ & FŐZY, 2020; holotype, NHMUS PAL 2020.1.1, Tölgyhát Limestone Formation; Murchisonae Zone, Opalinoides Subzone, Middle Jurassic (Aalenian), Tűzköves Ravine, south from Bakonycsernye, Hungary. © Márton Szabó, Hungarian Natural History Museum

Description
Original diagnose after Szabó & Főzy (2020) p. 299: Hybodontiform shark with crushing-type dentition with richly ornamented teeth, differing from other species of Asteracanthus by the combination of the following dental characteristics. The occlusal ornamentation of the teeth is composed by frequently branching folds and ridges at the higher crown parts turning into a minutely reticulate pattern towards the crown edges. No occlusal crest is present. The crown of the teeth bears a low and wide transversal ridge runs along almost the entire crown surface close to the labial edge. The labial and distal crown edges of the teeth are flattened. Teeth of the second anterior file have a low, occlusally triangular crown. The mesial extremity of teeth of the first lateral file is labially projected. The second lateral teeth are weakly arched with angled extremities, of which the mesial one is weakly domed. The cross-section view of the teeth is asymmetrical, hat- like, caused by the low and wide labially oriented transversal ridge.

Remarks
valid after Szabó & Főzy (2020) p. 299 [28661];


References
SZABÓ, M. & FŐZY, I. (2020)
Asteracanthus (Hybodontiformes: Acrodontidae) remains from the Jurassic of Hungary, with the description of a new species and with remarks on the taxonomy and paleobiology of the genus. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen Band, 297 (3): 295 - 309
DOI: 10.1127/njgpa/2020/0926