A new earwig species of Idolopsalis (Dermaptera: Anisolabididae: Idolopsalinae) from Uruguay, with a reexamination of the diagnostic characteristics of the subfamily

Anisolabididae (Insecta: Dermaptera) encompasses around 400 earwig species distributed in 12 subfamilies. This paper describes and illustrates a new anisolabidid species from Uruguay, Idolopsalis setosa Iparaguerre and Kamimura sp. nov., and revises diagnostic characteristics of the subfamily Idolopsalinae, which consists solely of the species in the genus Idolopsalis Borelli, 1910, endemic to Central and South America. Idolopsalis setosa sp. nov. is distinct from all previously described congeners with the unique combination of the following characters: the long virgae with a sclerotized appendage at the base, linear parameres, and dense setae on the penultimate sternite and forceps. This species has been recorded in three departments of Uruguay, from coastal areas to inland regions, representing the southernmost record of this subfamily to date. Our comparative examination with type material of Idolopsalis riveti Borelli, 1910, I. nigrita Brindle, 1971, and I. parva Brindle, 1971 raised questions regarding the reduction of the penis lobe, which has previously been regarded as a diagnostic characteristic of this subfamily.