Overslaan en naar de inhoud gaan
Publicaties | Personen | Instituten | Projecten
[ meld een fout in dit record ]mandje (0): toevoegen | toon Print deze pagina

A gymnodont fish jaw with remarkable molariform teeth from the early Eocene of Gujarat, India (Teleostei, Tetraodontiformes)
Bemis, K.E.; Tyler, J.C.; Bemis, W.E.; Kumar, K.; Rana, R.S.; Smith, T. (2017). A gymnodont fish jaw with remarkable molariform teeth from the early Eocene of Gujarat, India (Teleostei, Tetraodontiformes). J. Vertebr. Paleontol. 37(6): e1369422. https://dx.doi.org/10.1080/02724634.2017.1369422
In: Journal of Vertebrate Paleontology. Society of Vertebrate Paleontology: Norman, Okla.. ISSN 0272-4634; e-ISSN 1937-2809, meer
Peer reviewed article  

Beschikbaar in  Auteurs 

Trefwoord
    Marien/Kust

Auteurs  Top 
  • Bemis, K.E.
  • Tyler, J.C.
  • Bemis, W.E.
  • Kumar, K.
  • Rana, R.S.
  • Smith, T., meer

Abstract
    The lower jaw of a gymnodont fish collected from the lower Eocene Cambay Shale Formation in Gujarat Province, western India, has fused dentaries without a beak and a remarkable series of teeth that are unique among all known fossil and living Tetraodontiformes. The teeth are molariform, with raised spokes radiating inward from the emarginated peripheral edge of the crown. Tooth development is intraosseous, with new teeth developing in spongy bone before they erupt and attach to the dentary by pedicels. Although many of the 110 tooth loci in the fossil have lost their teeth, in life the teeth would have grown to fit tightly together to form a broad and continuous crushing surface. The estimated age of the Cambay Shale vertebrate fauna is ca. 54.5 Ma, making the jaw the second oldest confirmed gymnodont fossil. Preliminary comparisons with extant taxa of gymnodonts with fused dentaries (e.g., Diodon, Chilomycterus, and Mola) show detailed similarities in jaw structure, but further study of the dentition is needed to better understand the evolutionary position of the new fossil. We describe the new gymnodont as †Avitoplectus molaris, gen. et sp. nov., in †Avitoplectidae, fam. nov., and place the family as incertae sedis within Gymnodontes.

Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs