Thrinacodus

Thrinacodus
Temporal range: Late Devonian-Lower Carboniferous Famennian–Serpukhovian
Restoration of T. gracia
Teeth of T. dziki
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Clade: †Phoebodontiformes
Genus: †Thrinacodus
St. John and Worthen, 1875
Species
  • Thrinacodus tranquillus Ginter, 2000
  • Thrinacodus gracia (Grogan & Lund, 2008)
  • Thrinacodus ferox (Turner, 1982)
  • Thrinacodus nanus St. John and Worthen, 1875
  • Thrinacodus bicuspidatus Ginter and Sun, 2007
  • Thrinacodus dziki Ginter et al. 2014
Synonyms
  • Thrinacoselache Grogan & Lund, 2008

Thrinacodus is an extinct genus of basal elasmobranch, found worldwide from the Late Devonian-Lower Carboniferous. The type species is Thrinacodus nanus.[1] Most species are only known from their tricuspid teeth. T. gracia, originally placed in the separate genus Thrinacoselache from the Serpukhovian-aged Bear Gulch Limestone, of what is now Montana, is known from full body impressions, showing a long, slender eel-like body up to a metre in length, with an elongate rostrum.[2][3][4] Stomach contents of T. gracia include remains of crustaceans and small chondrichthyan fish (Harpagofututor and Falcatus).[2] It is a member of the Phoebodontiformes.[4]

  1. ^ Brett Roelofs, Milo Barham, Arthur J. Mory, Kate Trinajstics (January 2016). "Late Devonian and Early Carboniferous chondrichthyans from the Fairfield Group, Canning Basin, Western Australia". Palaeontologia Electronica. 19 (1): 1–28. doi:10.26879/583.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  2. ^ a b Grogan, Eileen D.; Lund, Richard (2008). "A basal elasmobranch, Thrinacoselache gracia n. gen and sp., (Thrinacodontidae, new family) from the Bear Gulch Limestone, Serpukhovian of Montana, USA". Journal of Vertebrate Paleontology. 28 (4): 970–988. doi:10.1671/0272-4634-28.4.970. S2CID 84735866.
  3. ^ Ginter, Michał; Turner, Susan (2010-12-02). "The middle Paleozoic Selachian genus Thrinacodus". Journal of Vertebrate Paleontology. 30 (6): 1666–1672. doi:10.1080/02724634.2010.520785. ISSN 0272-4634. S2CID 86058786.
  4. ^ a b Frey, Linda; Coates, Michael; Ginter, Michał; Hairapetian, Vachik; Rücklin, Martin; Jerjen, Iwan; Klug, Christian (2019-10-09). "The early elasmobranch Phoebodus: phylogenetic relationships, ecomorphology and a new time-scale for shark evolution". Proceedings of the Royal Society B: Biological Sciences. 286 (1912): 20191336. doi:10.1098/rspb.2019.1336. ISSN 0962-8452. PMC 6790773. PMID 31575362.