Tylopterella

Tylopterella
Temporal range: Silurian
Fossil Tylopterella boylei
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Chelicerata
Order: †Eurypterida
Superfamily: †Onychopterelloidea
Family: †Onychopterellidae
Genus: †Tylopterella
Størmer, 1951
Type species
Tylopterella boylei
Whiteaves, 1884

Tylopterella is a genus of prehistoric eurypterid classified as part of the family Onychopterellidae. The genus contains one species, T. boylei, from the Silurian of Ontario, Canada.[1] A second species, ‘Tylopterella’ menneri, was described from Devonian of Taymyr, Russia; however, it was subsequently reinterpreted as a member of Chasmataspidida rather than a eurypterid, an assigned to a separate genus Dvulikiaspis.[2]

Tylopterella is distinguishable by its small size, and its thick, partly calcareous exoskeleton with curved ridges of confluent tubercules and large knobs near the median line. Its prosoma (head) has a raised margin.[3]

See also

References

  1. ↑ Dunlop, J. A., Penney, D. & Jekel, D. 2015. A summary list of fossil spiders and their relatives. In World Spider Catalog. Natural History Museum Bern, online at http://wsc.nmbe.ch, version 16.0 http://www.wsc.nmbe.ch/resources/fossils/Fossils16.0.pdf (PDF).
  2. ↑ David J. Marshall; James C. Lamsdell; Evgeniy Shpinev; Simon J. Bradd (2013). "A diverse chasmataspidid (Arthropoda: Chelicerata) fauna from the Early Devonian (Lochkovian) of Siberia". Palaeontology. in press. doi:10.1111/pala.12080.
  3. ↑ Størmer, L. 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata, P34.


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