Redescription of the Snail Mite Riccardoella reaumuri (Acariformes: Prostigmata: Ereynetidae)

Abstract

Riccardoella (Proriccardoella) reaumuri Fain and van Goethem, 1986 (Ereynetidae Oudemans, 1931) is one of the parasitic mites reported from lungs of land mollusks. This paper provides a morphological redescription of this species, with some information of leg setation and chaetotaxy, lyrifissures and aggenital region. Riccardoella reaumuri is distinct from and can be distinguished from the other seven species of genus Riccardoella Berlese, 1923 by the following features: all setae on idiosoma, palptarsi and legs not prolonged with apical filament; palptarsus with three setae; tibia I with five setae; femur I with one seta; trochanters I and III each with one seta; coxae I and III each with two setae; famulus forked distally and ca. 60% long of its guard seta; two pairs of pseudanal setae.