Carcharhinus underwoodi

Samonds, Andrianavalona, Wallett, Zalmout & Ward, 2019


Classification: Elasmobranchii Carcharhiniformes Carcharhinidae

Reference of the original description
Samonds, K.E. & Andrianavalona, T.H. & Wallett, L.A. & Zalmout, I.S. & Ward, D.J. (2019)
A middle - late Eocene neoselachian assemblage from nearshore marine deposits, Mahajanga Basin, northwestern Madagascar. PLoS ONE, 14(2), Article e0211789

Types
Carcharhinus underwoodi
Holotype: UAP: 01.148a1; Paratype: UAP: 05.140; UAP: 03.719; UAP: 10.001; UAP: 05.018; UAP: 05.008;

Images of types

Description:


Citation: Carcharhinus underwoodi Samonds, Andrianavalona, Wallett, Zalmout & Ward, 2019: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 12/2024

Please send your images of "Carcharhinus underwoodi" to info@shark-references.com

Carcharhinus underwoodi sp. nov., holotype, (UAP-01.148a1) upper anterior tooth in lingual (G) and labial views (H) © SAMONDS, ANDRIANAVALONA, WALLETT, ZALMOUT & WARD, 2019

Description
Original diagnose after Samonds et al. (2019) p. 10 [27054]: Carcharhinus species known only from isolated teeth. The teeth display gradient monognatic heterodonty, but no evidence of dignathic heterodonty. The teeth are slightly wider than tall and comprise a distally directed crown and distal heel. The mesial cutting edge is straight to slightly convex. The distal serrae are triangular and evenly increase in size from the root-crown junction to the rounded distal notch. The mesial and distal cutting edges on the crown apex are finely serrated, the basal portion of the mesial cutting edge is irregularly serrated. The angle subtended by the crown apex is about 40˚ for anterior teeth increasing to 50˚ in more lateral files.

Remarks
shark-references Species-ID=15414;
valid after Samonds et al. (2019) p. 10 [27054];


References
Brée, B. & Condamine, F.L. & Guinot, G. (2022)
Combining palaeontological and neontological data shows a delayed diversification burst of carcharhiniform sharks likely mediated by environmental change. Scientific Reports, 12, Article 21906
DOI: 10.1038/s41598-022-26010-7
Samonds, K.E. & Andrianavalona, T.H. & Wallett, L.A. & Zalmout, I.S. & Ward, D.J. (2019)
A middle - late Eocene neoselachian assemblage from nearshore marine deposits, Mahajanga Basin, northwestern Madagascar. PLoS ONE, 14(2), Article e0211789
DOI: 10.1371/journal.pone.0211789