Abstract
The spider genus Strotarchus Simon, 1888 includes 18 extant species from the American continent (12 from Mexico). Additionally, two fossil species have been described for this genus, Strotarchus paradoxus (Petrunkevitch, 1963) from Mexican amber (Chiapas), and Strotarchus heidti Wunderlich, 1988 from Dominican Republic amber. From two pieces of amber from Chiapas, here we describe for the first time, the male of the fossil spider S. paradoxus previously known only by a female specimen preserved in amber from the same locality. Moreover, a diagnosis is proposed for this species based on the characteristics of the female described by Petrunkevitch (1963) and the male here described.
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