Bathyuriscus

Bathyuriscus
Temporal range: Middle Cambrian
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Trilobita
Order:
Corynexochida
Family:
Dolichometopidae
Genus:
Bathyuriscus

Meek, 1873
species
  • B. haydeni (type) synonym Bathyurus haydeni[1]
  • B. adaeus Walcott, 1916
  • B. balus Walcott, 1916
  • B. boscaputensis Young & Ludvigsen, 1989
  • B. brighamensis Resser, 1939
  • B. concavus Babcock, 1994
  • B. fimbriatus Robison, 1964
  • B. formosus Deiss
  • B. howelli Walcott, 1886 synonym Athabaskia howelli[2]
  • B. maximus Mason, 1935
  • B. mendozanus (Rusconi, 1945)) synonyms Plesioparabolina mendozana, Amecephalus mendozanus, A. mendozaensis, Kistocare mendozanum, Parkaspis endecamera[3]
  • B. ornatus Walcott, 1908
  • B. petalus Fritz, 1968
  • B. piedmontensis Resser, 1938
  • B. punctatus Palmer, 1968
  • B. rotundatus (Rominger, 1887) synonym Embolimus rotundata[4]
  • B. saintsmithi Chapman, 1929
  • B. terranovensis Young & Ludvigsen, 1989
  • B. wongi Sun, 1935
Synonyms

Orria, Orriella, Wenkchemnia

Bathyuriscus is an extinct genus of Cambrian trilobite. It was a nektobenthic predatory carnivore. The genus Bathyuriscus is endemic to the shallow seas that surrounded Laurentia.[3] Its major characteristics are a large forward-reaching glabella, pointed pleurae or pleurae with very short spines, and a medium pygidium with well-impressed furrows. Complete specimens have never reached the size of 7 cm predicted by the largest pygidium found. Bathyuriscus is often found with the free cheeks shed, indicating a moulted exoskeleton.[5] An average specimen will in addition have a furrowed glabella, crescent-shaped eyes, be semi-circular in overall body shape, have 7 to 9 thoracic segments, and a length of about 1.5 inches.[6]

  1. ^ Walcott, C.D. (1886). "Second Contribution to the Studies on the Cambrian Faunas of North America". Bulletin of the United States Geological Survey. 30: 5–369. Retrieved 1 July 2013.
  2. ^ Palmer, A.R. (1954). "An appraisal of the great Basis Middle Cambrian trilobites described before 1900". United States Geological Survey Professional Papers. 264D: 55–83. Retrieved 1 July 2013.
  3. ^ a b Bordonaro, O.L.; Fojo, C.F. (2011). "Bathyuriscus mendozanus (Rusconi, 1945), trilobites del Cámbrico medio de la Precordillera Argentina [Bathyuriscus mendozanus (Rusconi, 1945), middle Cambrian trilobites from the Argentine Precordillera]" (PDF). Revista Española de Paleontología. 26 (1): 11–23. ISSN 0213-6937. Retrieved 30 June 2013.
  4. ^ Cite error: The named reference BS was invoked but never defined (see the help page).
  5. ^ Coppold, Murray and Wayne Powell (2006). A Geoscience Guide to the Burgess Shale, p.56. The Burgess Shale Geoscience Foundation, Field, British Columbia. ISBN 0-9780132-0-4.
  6. ^ Rhodes, Frank H. T.; Herbert S. Zim; Paul R. Shaffer (1962). Fossils: A Guide to Prehistoric Life. New York City, NY, USA: Western Publishing Company, Inc. pp. 95. ISBN 0-307-24411-3.