A New Genus and a New Species of Neopygmephoridae (Acari: Pygmephoroidea) Phoretic on Anomiopsoides Cavifrons (Coleoptera: Scarabaeidae) From Argentina

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A new monobasic genus of Neopygmephorid mites (Acari: Neopygmephoridae)—Rhombophorus brevipedis gen. and sp. n.—collected from the beetle Anomiopsoides cavifrons (Burmeister) (Scarabaeidae: Eucraniini) in Argentina is described. Females of the new genus are characterized by a remarkable enlarged, poorly sclerotized and almost rhombic in outline claw on tibiotarsus I, as well as large pinnaculum, bearing two solenidia (ω1 and ω2) and four eupathidia (tc’, tc”, ft’, ft”) on tibiotarsus I. A provisional key to the genera of Neopygmephoridae is also provided.