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Tmarus cinerasceus (RM)
|Previous species name:|
female: 5 mm|
male: 4 mm
In a curled green leaf retreat
May be too small to cause illness
This species has been preented on the internet as Tmarus cinerascens and even the World Spider Catalog originally listed this species name.
However, it now appears that the T. cinerascens species name was an incorrect copying of the original name given to this spider. Curiously, this particular thomisid has suffered
a number of other confusing name changes since it was first described. L. Koch in 1876 named it Monaeses cinerasceus but in 1911 Rainbow published in the Records of the Australian Museum
a list of Australian spiders which included Tmarus cineraceus. This same spelling of the species name was also used by Ramon Mascord in his 1970 and 1980 spider booklets
but other arachnologists have subsequently taken the view that since Koch's species name came first it is the one we should be using (a normal convention for the naming
of spiders), although everyone was happy to leave the generic name as Tmarus rather than the one Koch originally used.
The shape of the abdomen is a useful identifying characteristic. It is also usual for the resting spider to adopt a
Y shape using the front two pairs of legs.
Known range: Not common anywhere in Australia but known in Cairns, Sydney, Melbourne and Adelaide.
Spider(s) with a very similar appearance: Tmarus marmoreus and Sidymella rubrosignata.
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Last updated 25 January 2022.