Serrodiscus

Serrodiscus
Temporal range: Lower Cambrian
pygidia of Serrodiscus silesius
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Trilobita
Order:
Agnostida
Suborder:
Eodiscina
Superfamily:
Eodiscoidea
Family:
Weymouthiidae
Genus:
Serrodiscus

Richter & Richter, 1941
Species]]

See text

Synonyms

Paradiscus Kobayashi, 1943 [type: Microdiscus speciosus Ford, 1872]

Serrodiscus Richter and Richter 1941.[1] is a genus of Eodiscinid trilobite belonging to the family Weymouthiidae Kobayashi T. (1943),[2] Order Agnostida (Salter 1864).[3] It lived during the late Lower Cambrian, with remains found in Canada (Newfoundland & Nova Scotia), China (Gansu), The United Kingdom (England), Germany (Silesia), Poland (Holy Cross Mountains), the Russian Federation (Tuva, Gorno-Altayskaya, Kuznetsk Alatau), and the United States (Massachusetts, New York State).[4] It is named for the spines on the ventral side of the pygidium, which give it a serrated impression.

Fletcher & Theokritoff (2008) [5] designated Shaw’s (1950, pl. 79, fig. 24) [6] specimen of “Weymouthia nobilis (Ford, 1872)” [7] as the holotype of a new species, Serrodiscus weymouthioides, and considered Runcinodiscus Rushton (in Bassett et al., 1976) [8] [= ?Weymouthia nobilis (Ford, 1872)] to be a junior synonym of Serrodiscus. Weymouthia and Runcinodiscus had previously been viewed as closely allied with Serrodiscus (e.g. Rushton op. cit., 1976).

  1. ^ RICHTER, R., & RICHTER, E., 1941. Die Fauna des Unter-Kambriums von Cala in Andalusien. Abhandlungen der senckenbergischen naturforschenden Gesellschaft, 455: 90 pp., 83 figs., 4 pls., Frankfurt.
  2. ^ KOBAYASHI T. 1943. Brief notes on the Eodiscids 1, their classification with a description of a new species and a new variety, Proceedings of the Imperial Academy, Tokyo, Volume 19, pp. 37-42.
  3. ^ SALTER, J. W. 1864: On some new fossils from the Lingula-flags of Wales. Quarterly Journal of the Geological Society of London, 20, 233–241.
  4. ^ Cite error: The named reference Treatise was invoked but never defined (see the help page).
  5. ^ FLETCHER, T. P. & THEOKRITOFF, G., 2008. The Early Cambrian of eastern Massachusetts. Northeastern Geology and Environmental Science, 30, 301-329.
  6. ^ SHAW, A. B., 1950. A revision of several Early Cambrian trilobites from eastern Massachusetts. Journal of Paleontology, 24, 577-590.
  7. ^ FORD, S. W., 1872. Descriptions of some new species of primordial fossils. American Journal of Science, Series 3, 3, 419-422.
  8. ^ BASSETT, M. G., OWENS, R. M & RUSHTON, A. W. A., 1976. Lower Cambrian fossils from the Hell’s Mouth Grits, St. Tudwal’s Peninsula, North Wales. Journal of Geological Society of London, 132, 623-644.