Euastacus setosus has a narrow range and is known only from a small area in the Maiala National Park near Mount Glorious, north-west of Brisbane, Queensland. (QLD)
Euastacus setosus differ from other Queensland species of crayfish by the combination of the following features: a setose ('hairy') body, three or four spines on the inner edge of the wrist of the large claws, a pair of small spines behind the eyes, and lacking large spines on the abdomen. The maximum body length is about 10 cm. The body is dark red-brown above and orange and cream below. The spines around the head are pale yellow and the edges of the abdomen often have a blue-violet tinge.
Ecology/Way of Life:
Euastacus setosus live in cool, clear streams and creeks bordered by subtropical rainforest or dry sclerophyll forest at altitudes above 500 m. Little is known about the biology of E. setosus, but it most likely lives under rocks or in burrows in the stream bank like other spiny crayfish. Like other spiny crayfish, E. setosus is probably a scavenger that feeds mostly on decaying plant matter.
Interaction with Humans/Threats:
Euastacus setosus is not presently under threat because known populations are located within the national park. However, like other species of freshwater crayfish, the most important threats to the species are from habitat destruction such as land clearing and its associated water pollution.
Euastacus setosus was named by Riek in 1956. The name is based on the Latin word setosus, meaning bristly, alluding to the somewhat hairy appearance of the body.
Morgan, G. (1988). Freshwater crayfish of the genus Euastacus Clark (Decapoda: Parastacidae) from Queensland. Memoirs of the National Museum of Victoria 49 (1): 1–49.
Morgan, G. (1991). The spiny crayfish of Queensland. The Queensland Naturalist 31: 29–36.
Text and map by Shane Ahyong. Photograph by J. W. Short
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