Trachyteuthis

Trachyteuthis
Temporal range: Callovian–Cenomanian
Reconstruction of Trachyteuthis hastiformis
Trachyteuthis hastiformis, Jura Museum
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Coleoidea
Superorder: Octopodiformes
Order: incertae sedis
Family: Trachyteuthididae
Subfamily: Trachyteuthidinae
Naef, 1921
Genus: Trachyteuthis
Meyer, 1846
Species
  • T. covacevichi
    Fuchs, 2008
  • T. hastiformis
    (Rüppel, 1828)
  • T. nusplingensis
    Fuchs, 2007
  • T. teudopsiformis
    Fuchs, 2007

Trachyteuthis is a genus of fossil teuthid, comprising four species: T. hastiformis, T. nusplingensis, T. teudopsiformis,[1] and T. covacevichi.[2]

Taxonomy

The taxonomic placement of Trachyteuthis is uncertain. Though often assigned to the order Vampyromorphida, the discovery of fossilised Trachyteuthis beaks in the Upper Jurassic limestone of Germany suggests a close phylogenetic relation to the Octopoda.[3][4] It is clear that it does at least belong in the Coleoidea.[1] It is thought to be very closely related to Teudopsis.[2]

Distribution

Fossils are scarce but have been reported from the Kimmeridge clay of the UK; the Solnhofen limestone of Germany, Jurassic deposits in Antarctica,[5] and Oxfordian deposits in Chile.[2]

History

Fossilised gladius structure of T. hastiformis

First described in 1773 as the remnants of a fish, Trachyteuthis was considered comparable to a Sepia cuttlebone by Rüppell in 1829. A separate genus was erected for the material in 1846 by Meyer.[1] English material discovered in 1855 was termed Coccoteuthis latipinnis; this was later synonymised with the identical Solnhofen deposits. A 2007 survey of museum collection established that there were ground for the erection of three species within the genus.[1]

References

  1. 1 2 3 4 Fuchs, D.; Engeser, T.; Keupp, H. (2007). "Gladius shape variation in coleoid cephalopod Trachyteuthis from the Upper Jurassic Nusplingen and Solnhofen Plattenkalks" (PDF). Acta Palaeontologica Polonica 52 (3): 575–589.
  2. 1 2 3 Fuchs, D.; Schultze, H.-P. (2008). "Trachyteuthis covacevichin. Sp., a Late Jurassic Palaeopacific coleoid cephalopod". Fossil Record 11 (1): 39. doi:10.1002/mmng.200700012.
  3. ↑ Klug, C.; Schweigert, G.; Dietl, G.; Fuchs, D. (2005). "Coleoid beaks from the nusplingen Lithographic Limestone (Upper Kimmeridgian, SW Germany)". Lethaia 38 (3): 173. doi:10.1080/00241160510013303.
  4. ↑ Fischer, J.; Riou, B. (2002). "Vampyronassa rhodanica nov. gen. nov sp., vampyromorphe (Cephalopoda, Coleoidea) du Callovien inférieur de la Voulte-sur-Rhône (Ardèche, France)". Annales de Paléontologie 88 (1): 1. doi:10.1016/S0753-3969(02)01037-6.
  5. ↑ Doyle, P. (1991). "Teuthid cephalopods from the Upper Jurassic of Antarctica" (PDF). Palaeontology 34 (1): 169–178.

External links

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