Two new species of Trichoniscus with gland-piliferous organs (Isopoda, Oniscidea) from northern Tuscany (Central Italy)

Three species of Trichoniscus, characterized by males bearing gland-piliferous organs, are recorded from northern Tuscany, Italy. Two of these species are described as new: Trichoniscus tabacarui n. sp. and T. glandulifer n. sp. A third species, identified as Trichoniscus sulcatus Verhoeff, 1917 and originally described from South Tyrol, is redescribed on specimens collected in Tuscany. Based on the shape of the male pleopod 1, all these species belong to the Trichoniscus provisorius group.