Some species are rare and found in few numbers and sometimes a species is described on the basis of just one of the sexes. This was the case for Wernerius mumai (Sissom, 1993) (Vaejovidae). Richard Ayrey and Brandon Meyers have now found males of this species and has described this sex in a recent paper.
Abstract:
A male of Wernerius mumai (Sissom, 1993) is described for the first time, collected at the type locality (Gold Road, Black Mountains, Mohave County, Arizona). Originally placed in the genus Vaejovis, this species later was transferred by Soleglad & Fet (2008) to the genus Wernerius. It is one of the smallest vaejovid species known. The pedipalp fixed finger usually has 6 ID denticles and the movable finger has 7. The most unique characteristic of this species is the long, pointed, subaculear tubercle.
Reference:
Ayrey RF, Myers BT. Description of the male of Wernerius mumai (Sissom, 1993) from western Arizona, with data on reproduction (Scorpiones: Vaejovidae). Euscorpius. 2020(317):1-17. [Open Access]
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