Brachycarcharias twiggsensis
(Case, 1981)
Classification: Elasmobranchii Lamniformes Odontaspididae
Reference of the original description
Late Eocene selachians from South-central Georgia. Palaeontographica, Abt. A, 176(1–3), 52–79
Late Eocene selachians from South-central Georgia. Palaeontographica, Abt. A, 176(1–3), 52–79
Types
Brachycarcharias twiggsensis
Brachycarcharias twiggsensis
Description:
Citation: Brachycarcharias twiggsensis (Case, 1981): In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 06/2026
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Brachycarcharias twiggsensis (Case, 1981), Late Eocene, Priabonian, Daklha, Morocco © Jean-Francois LHOMME, www.vertebres-fossiles.com
Brachycarcharias twiggsensis (Case, 1981), Late Eocene, Priabonian, Daklha, Morocco © Jean-Francois LHOMME, www.vertebres-fossiles.com
Description
diagnosis after Case 1981 [391]: Teeth ranging in size from 1.5 to 3 cms, and averaging 2.5 cms, a vestigial median furrow (groove) on the root area, teeth with from 1 to 2 lateral cusps on either side. Description: Lower jaw teeth erect. Anterior teeth with slender cuspidate lateral cusps. Lateral teeth wider, with from 1 to 2 lateral cusps, triangular in shape, and the larger of the cusps — flaring out in opposite directions from the tooth blade. No medial furrow (groove), but an imperfectly developed "furrow" on some specimens, with a definitive apical foramen positioned on the lingual boss of the tooth's root.
diagnosis after Case 1981 [391]: Teeth ranging in size from 1.5 to 3 cms, and averaging 2.5 cms, a vestigial median furrow (groove) on the root area, teeth with from 1 to 2 lateral cusps on either side. Description: Lower jaw teeth erect. Anterior teeth with slender cuspidate lateral cusps. Lateral teeth wider, with from 1 to 2 lateral cusps, triangular in shape, and the larger of the cusps — flaring out in opposite directions from the tooth blade. No medial furrow (groove), but an imperfectly developed "furrow" on some specimens, with a definitive apical foramen positioned on the lingual boss of the tooth's root.
References
Late Eocene fishes from the Tupelo Bay Formation of South Carolina, USA. Rivista Italiana di Paleontologia e Stratigrafia , 132(2), 431–512
DOI: 10.54103/2039-4942/30814
Fossil chondrichthyans of the Carpathian-Pannonian Region (in Hungarian: A Kárpát-Pannon-térség fosszilis porcoshalai). Hungarian Natural History Museum, Dabasi Nyomda Zrt., Budapest. 255 pages, ISBN 978-963-9877-52-8
Paleogene Fishes of Alabama, Brachycarcharias version 1. In J.A. Ebersole (ed.), Fossil Fishes of Alabama. McWane Science Center, Birmingham, Alabama 4(12), 1–8
DOI: 10.69737/QQGJ1332
Taxonomy and biostratigraphy of the elasmobranchs and bony fishes (Chondrichthyes and Osteichthyes) of the lower-to-middle Eocene (Ypresian to Bartonian) Claiborne Group in Alabama, USA, including an analysis of otoliths. European Journal of Taxonomy, 585, 1–274
DOI: 10.5852/ejt.2019.585
Shark and ray faunas in the Middle and Late Eocene of the Fayum Area, Egypt. Proceedings of the Geologists' Association, 122(1), 47–66
DOI: 10.1016/j.pgeola.2010.09.004
Paleo-environments of the exposed Eocene Sediments between Wadi El-Hitan and east Siwa in the Egyptian Western Desert based on their faunal content especially the vertebrates. Thesis, Zagazig University, Faculty of Science, Geology Department
Late Eocene fishes from the Tupelo Bay Formation of South Carolina, USA. Rivista Italiana di Paleontologia e Stratigrafia , 132(2), 431–512
DOI: 10.54103/2039-4942/30814
Fossil chondrichthyans of the Carpathian-Pannonian Region (in Hungarian: A Kárpát-Pannon-térség fosszilis porcoshalai). Hungarian Natural History Museum, Dabasi Nyomda Zrt., Budapest. 255 pages, ISBN 978-963-9877-52-8
Paleogene Fishes of Alabama, Brachycarcharias version 1. In J.A. Ebersole (ed.), Fossil Fishes of Alabama. McWane Science Center, Birmingham, Alabama 4(12), 1–8
DOI: 10.69737/QQGJ1332
Taxonomy and biostratigraphy of the elasmobranchs and bony fishes (Chondrichthyes and Osteichthyes) of the lower-to-middle Eocene (Ypresian to Bartonian) Claiborne Group in Alabama, USA, including an analysis of otoliths. European Journal of Taxonomy, 585, 1–274
DOI: 10.5852/ejt.2019.585
Shark and ray faunas in the Middle and Late Eocene of the Fayum Area, Egypt. Proceedings of the Geologists' Association, 122(1), 47–66
DOI: 10.1016/j.pgeola.2010.09.004
Paleo-environments of the exposed Eocene Sediments between Wadi El-Hitan and east Siwa in the Egyptian Western Desert based on their faunal content especially the vertebrates. Thesis, Zagazig University, Faculty of Science, Geology Department
