Temporal range: Toyonian/Ordian
Hoeferia Redlich, 1899 non Bittner, 1894
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.
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 (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.
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
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- Simpson, Dave. "Trilobites of South Australia". Retrieved August 23, 2005.
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