Temporal range: Toyonian/Ordian
Hoeferia Redlich, 1899 non Bittner, 1894
Redlichia is a genus of redlichiid trilobite in the family Redlichiidae, with large to very large species (up to 35 centimetres or 14 inches long). Fossils of various species are found in Lower Cambrian (Toyonian)-aged marine strata from China, Korea, Pakistan, the Himalayas, Iran, Spain, southern Siberia, and Antarctica, and from Middle Cambrian (Ordian)-aged marine strata of Australia.
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.
Redlich originally named the genus Hoeferia in 1899. It turned out however, that this name was already given to an arcoid bivalve by Bittner in 1894, rendering it an unavailable junior homonym. This is why in 1902, Cossmann renamed Hoeferia Redlich, 1899 as Redlichia.
Mesodema Whitehouse, 1939, Dongshania Lin in Qiu et al., 1983, and Spinoredlichia Liu, 1975, are all considered to be synonyms of Redlichia.
The type species, R. noetlingi, is found in Lower Cambrian-aged marine strata of Western Pakistan. A similar species, R. chinensis, is found in Lower Cambrian-aged marine strata of China. R. nobilis, is found in Lower Cambrian-aged marine strata of South Korea.
Some of the species that were originally assigned to Redlichia were later moved to other genera.
- R. blanckenhorni = Redlichops blanckenhorni
- R. finalis = Redlichaspis finalis
- R. nakamurai = Neoredlichia nakamurai
- R. walcotti Lu, 1941= Archaeops lui
- R. walcotti Mansuy, 1912= Saukandiops walcotti
- R. cf. walcotti Saito, 1934= Latiredlichia saitoi
- 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.
- 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.
- Mikko Haaramo. "Mikko's Phylogeny Archive". Retrieved 6 November 2012.
- Hagadorn, J.W. (2002). "Burgess Shale-type Localities: The global picture". In Bottjer, D.J.; W. Etter; J.W. Hagadorn; C.M. Tang. 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.