Carcharhinus underwoodi
Samonds, Andrianavalona, Wallett, Zalmout & Ward, 2019
Classification: Elasmobranchii Carcharhiniformes Carcharhinidae
Reference of the original description
A middle - late Eocene neoselachian assemblage from nearshore marine deposits, Mahajanga Basin, northwestern Madagascar. PLoS ONE, 14(2), Article e0211789
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;
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 04/2024
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
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.
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.
References
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
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
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
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
