Natarapax trivortex

FEICHTINGER, ENGELBRECHT, LUKENEDER & KRIWET, 2018


Classification: Elasmobranchii Symmoriiformes Falcatidae

Reference of the original description
FEICHTINGER, I. & ENGELBRECHT, A. & LUKENEDER, A. & KRIWET, J. (2020)
New chondrichthyans characterised by cladodont-like tooth morphologies from the Early Cretaceous of Austria, with remarks on the microstructural diversity of enameloid. Historical Biology, 32 (6): 823-836

Types
Natarapax trivortex


Images of types

Description:


Citation: Natarapax trivortex FEICHTINGER, ENGELBRECHT, LUKENEDER & KRIWET, 2018: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 06/2021

Please send your images of "Natarapax trivortex" to info@shark-references.com

Natarapax trivortex lateral tooth (NHMW/2017/0057/0001) © Iris Feichtinger, Vienna

Description
type species of Natarapax Feichtinger et al., 2020 p. 824 [26760] by original designation (Art. 68.2 ICZN);

Original diagnose after Feichtinger et al. (2020) p. 828-829 [26760]: The teeth are generally broader than high and relatively small (less than 1mm in width and height). The main cusp is triangular and the distal cutting edge of the teeth is steeper than it is mesially and perpendicular to the basal root face. One pair of lateral cusplets flanks the main cusp. All three cusps have distinct cutting edges, however, the cutting edges of the main cusp and mesial cusplets are mesially more strongly developed and significantly convex. The cutting edges are continuous between the apex of the main cusp and the lateral cusplets. The mesial cusplet is higher than the distal one. In profile view, all cusps are noticeably convex labially and lingually. Additionally, all cusps are curved lingually. The apices of anterior teeth are more pointed than in laterals. In occlusal view, the root is reduced and the main cusp is strongly labially depressed; additionally, a compression of the lateral cusplets occurs. The root is flat, hemiaulacorhize, and possesses a pair of well-developed buttons on the lingual root torus below the notch, between the main and lateral cusplets. Labially, the root is noticeably reduced. One well-developed pair of foramina is situated anterior to each root button with additional smaller foramina.

Remarks
valid after Feichtinger et al. (2020) p. 830 [26760];


References
FEICHTINGER, I. & ENGELBRECHT, A. & LUKENEDER, A. & KRIWET, J. (2020)
New chondrichthyans characterised by cladodont-like tooth morphologies from the Early Cretaceous of Austria, with remarks on the microstructural diversity of enameloid. Historical Biology, 32 (6): 823-836
DOI: 10.1080/08912963.2018.1539971