Mygalomorph spiders from Peru (Araneae, Pycnothelidae, Rhytidicolidae): description of two new species and first Peruvian report of the household Rhytidicolidae
Summary
Two beforehand unknown mygalomorph spider species belonging to 2 households are described from the south-central Andean area of Peru. Throughout the household Pycnothelidae, Acanthogonatus goloboffi sp. n. is described, identified and illustrated based mostly on a feminine from Ccochirhuay, Cusco. The feminine of this species differs from most recognized Acanthogonatus by the form of the spermathecae, which possess two single receptacles missing extra projections or chambers. It additional differs from congeners sharing a single receptacle by having non-spiraled ducts with a well-defined constriction and outwardly directed spherical receptacles. This represents the second report of the genus Acanthogonatus in Peru. Throughout the household Rhytidicolidae, Fufius agualaniensis sp. n. is described, identified and illustrated based mostly on a feminine from Agualani, Puno. The feminine of this species is distinguished from congeners by the next mixture of characters: a straight fovea; a sternum as large as lengthy; a labiosternal junction with a well-developed septum; a preening comb on metatarsus IV consisting of seven giant spines in a single row; and spermathecae with a large, inwardly curved stalk giving rise to 3 sinuous branches ending in digitiform or domed constructions. This constitutes the primary formal report of the household Rhytidicolidae from Peru.
Beratz, M. J., Ferretti, N. E., Chaparro, J. C., & West, R. C. (2026). Mygalomorph spiders from Peru (Araneae, Pycnothelidae, Rhytidicolidae): description of two new species and first Peruvian report of the household Rhytidicolidae. Zoodiversity, 60(2). https://doi.org/10.15407/zoo2026.02.109
