Redlichia

Redlichia
Temporal range: Toyonian/Ordian
Redlichia chinensis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Trilobita
Order: Redlichiida
Suborder: Redlichiina
Family: Redlichiidae
Genus: Redlichia
Cossmann, 1902
Species
  • R. noetlingi (Redlich, 1899) (Type) synonym Hoeferia noetlingi
  • R. advialis Öpik, 1970
  • R. amadeana Öpik, 1970
  • R. chinensis Walcott, 1905
  • R. creta Öpik, 1970
  • R. endoi Lu, 1950
  • R. forresti (Etheridge, 1890) synonym Olenellus forresti[1]
  • R. guizhouensis Zhou, 1974
  • R. gumridgensis Laurie, 2004
  • R. idonea Whitehouse, 1939
  • R. lepta Öpik, 1970
  • R. petita Öpik, 1970
  • R. mayalis Öpik, 1970
  • R. micrograpta Öpik, 1970
  • R. takooensis Lu, 1950[2]
  • R. venulosa (Whitehouse, 1939) synonym Mesodema venulosa
  • R. versabunda Öpik, 1970
  • R. vertumnia Öpik, 1970
Synonyms

Hoeferia Redlich, 1899 non Bittner, 1894
Mesodema Whitehouse, 1939
Dongshania Lin in Qiu et al., 1983
Spinoredlichia Liu, 1975

Redlichia is a genus of trilobite of the Redlichiidae family, with large to very large species (up to 35 centimetres or 14 inches long). It lived during the Lower Cambrian (Toyonian) in China, Korea, Pakistan, Himalayan region, Iran, Spain, southern Siberia, and Antarctica, while it is known from the Middle Cambrian (Ordian) of Australia.

Description

Redlichia has a rather flat and thinly calcified dorsal exoskeleton of inverted egg-shaped outline, about 1½× longer than wide, measured across the base of the genal spines and disregarding the spine on the 11th segment of the articulated middle part of the body (or thorax). The headshield (or cephalon) is semicircular, about ⅓× as long as the body, with clear genal spines that are a smooth continuation of the border, that extend backward and outward and curving to be near parallel near their tips, which typically extend to the backhalf of the articulated middle part of the body (or thorax). The thorax consists of 11-17 segments, with the 11th from the front bearing a backward directed spine on the midline.

Taxonomy

Redlich originally named the genus Hoeferia (1899). It turned out however, that this name was already given to an Arcoid bivalve by Bittner (1894), rendering it an unavailable junior homonym. This is why in 1902 Cossmann renamed Hoeferia Redlich, 1899 to Redlichia.

Mesodema Whitehouse, 1939, Dongshania Lin in Qiu et al., 1983, and Spinoredlichia Liu, 1975, are all considered to be synonyms of Redlichia.[3]

Reassigned species

Some of the species that were originally assigned to Redlichia were later moved to other genera.

References

  1. ↑ Glauert, L. "Determination of the exact localities where Cambrian fossils were collected by E.T. Hardman in 1884" (PDF). Records of the Western Australian Museaum and Art Gallery 1 (2): 66–72.
  2. ↑ Paterson, R.J.; Jago, J.B. (2006). "New trilobites from the Lower Cambrian Emu Bay Shale Lagerstätte at Big Gully, Kangaroo Island, South Australia.". Memoirs of the Association of Australasian Palaeontologists 32: 43–57. ISSN 0810-8889.
  3. ↑ Mikko Haaramo. "Mikko's Phylogeny Archive". Retrieved 6 November 2012.

Further reading

  • Hagadorn, J.W. (2002). "Burgess Shale-type Localities: The global picture". In Bottjer, D.J., W. Etter, J.W. Hagadorn & C.M. Tang, eds. Exceptional Fossil Preservation -- A Unique View on the Evolution of Marine Life. Columbia University Press. ISBN 0231102542.
  • Greg Edgecombe and the Australian Museum. "Australian Trilobites: A Species List and Bibliography". Retrieved August 23, 2005.
  • Sam Gon III. "A guide to the Orders of Trilobites". Retrieved August 23, 2005.
  • Nedin, C. (1995). "The Emu Bay Shale, a Lower Cambrian fossil Lagerstätte, Kangaroo Island, South Australia". Memoirs of the Association of Australasian Palaeontologists 18: 31–40.
  • Simpson, Dave. "Trilobites of South Australia". Retrieved August 23, 2005.