Urodepressa, Kontschán, 2018

Kontschán, Jenö, 2018, Urodepressa guatemalaensis gen. nov, sp. nov., a new remarkable genus and species from Guatemala (Acari: Uropodina: Urodinychidae), Revue suisse de Zoologie 125 (2), pp. 239-243 : 239

Urodepressa gen. nov.

Diagnosis: Idiosoma subpentagonal, with anterior vertex and humeral projections. Posterior margin with deep and concave incision. Marginal and dorsal shields completely separated. Dorsal shield with a large rectangular depression, anterior part of depression shallow, posterior part deep. All dorsal setae wide, phylliform or lanceolate and marginally serrate, setae j1 longer and more robust than other ones. Eight pairs of very long and marginally serrate setae situated on dorsal and marginal shields and arranged in three groups. Prestigmatic part of peritreme narrow and V-shaped. Genital shield of female with a hook-like anterior process. Sternal setae small, smooth and needlelike. Hypostomal setae h2 robust, h1 long, smooth and needle-like, h2, h3 and h4 with lateral spines. Chelicerae with internal sclerotized node. Tarsi of leg I without claws.

Type species: Urodepressa guatemalaensis sp. nov.

Etymology: The name of the new genus refers to the large depression on the dorsal idiosoma. The gender of the new genus name is feminine.

Notes: On the basis of the apically pilose internal malae, the smooth and needle-like setae h1, the robust setae h2, the presence of an internal sclerotized node on the chelicerae and the absence of tarsal claws on leg I, I place the new genus into the family Urodinychidae Berlese, 1917 . The concept of the family Urodinychidae follows by Mašán (2001), Beaulieu et al. (2011) and Kontschán (2013). According to these papers, the Urodinychidae differ from the Dinychidae Berlese, 1916 by the presence of leg grooves which are not developed in the Dinychidae ( Kontschán, 2013) . The new genus differs from the other previously described genera in this family by the presence of a large dorsal depression, by the shape of dorsal and ventral setae and by the unusual hook-like anterior process on the female genital shield.