Chelediscus

Chelediscus
Temporal range: Late Botomian
↓
[1]
a drawing of a cephalon and pygidium of Chelediscus acifer
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Trilobita
Order:
Agnostida
Suborder:
Eodiscina
Superfamily:
Eodiscoidea
Family:
Weymouthiidae
Genus:
Chelediscus

Rushton, 1966
species
  • C. acifer Rushton, 1966 (type)
  • C. chathamensis Rasetti, 1967

Chelediscus Rushton, 1966,[2] is a genus of Eodiscinid trilobite belonging to the family Weymouthiidae Kobayashi T. (1943),[3] Order Agnostida Salter (1864).[4] The Treatise assigns this genus to the Calodiscidae; Cotton and Fortey (2005) [5] however move it to the Weymouthiidae. Chelediscus lived during the later part of the Botomian stage.[1]

Drawing of Chelediscus acifer, enrolled, from the side

. Chelediscus is known from upper lower Cambrian strata in England, Newfoundland, New York State and Russia (Rushton, 1966; Fletcher, 2003;[6] Rasetti, 1967;[7] Jell in Kaesler, 1997;[8]

  1. ^ a b SEPKOSKI, J. (2002). "A compendium of fossil marine animal genera (Trilobita entry)". Bulletins of American Paleontology. 364: 560. Archived from the original on 2006-09-05. Retrieved 2008-01-12.
  2. ^ RUSHTON, A. W. A. 1966. The Cambrian Trilobites from the Purley Shales of Warwickshire Palaeontographical Society Monographs (1): p. 19, pl. 2, figs. 26 a - e.
  3. ^ 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.
  4. ^ 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.
  5. ^ COTTON T. J. and FORTEY R. A. Comparative morphology and relationships of the Agnostida. In book: Crustacea and Arthropod Relationships.
  6. ^ FLETCHER, T. P. 2003. Ovatoryctocara granulata: The key to a global Cambrian Stage boundary and the correlation of the olenellid, redlichiid and paradoxidid realms. In Trilobites and their relatives (eds P. D. Lane, D. J. Siveter & R. A. Fortey), pp. 73–102. Special Papers in Palaeontology no. 70.
  7. ^ RASETTI, F., 1967. Lower and Middle Cambrian trilobite faunas from the Taconic sequence of New York. Smiths. mise. Coli., 152 (4), pp. 1 - 111, 14 pls.
  8. ^ KAESLER, R. L. (ed.) 1997. Treatise on Invertebrate Paleontology. Part O. Arthropoda 1. Trilobita, Revised. Volume 1: Introduction, Order Agnostida, Order Redlichiida. Boulder, Colorado and Lawrence, Kansas: Geological Society of America and University of Kansas, 530 pp.