Trachyibana, Kontschán, Jenő, 2015

Kontschán, Jenő, 2015, Trachyibana sarawakiensis gen. nov., sp. nov., a remarkable new genus and species from Malaysia (Acari: Uropodina: Trachyuropodidae), Zootaxa 3915 (2), pp. 272-278 : 273

Trachyibana gen. nov.

Diagnosis. Idiosoma lemon-shaped. Dorsal and marginal shields completely separated, but situated close to each to other. Dorsal shield setae T-shaped, marginal setae simple, serrate. Dorsal shield ornamented by irregular pits. Metapodal region with a deep opisthogastric furrow bordered by several distally ramose setae. Other ventral setae smooth and needle-like. Genital shield of female large and linguliform, without anterior process. Dorsal and marginal shields hypertrichous. Tritosternum with narrow base, laciniae with two apically pilose medial branches and two smooth lateral branches. Epistome subtriangular and strongly serrate. Leg I with small claws; femora II-IV bearing ventral lamella-like structures.

Type species. Trachyibana sarawakiensis sp. nov.

Etymology. The name of the new genus is derived from the family name Trachyuropodidae and the Iban ethnic group, which is the largest native ethnic group in Sarawak. Gender feminine.

Systematic notes. On the basis of the shape of the internal malae (divided into four fringed branches), the presence of T-shaped setae on the dorsal shield, the position of hypostomal setae h3 lateral to the row h1-h4, the presence of the internal sclerotised node associated with levator tendon in the chelicerae, and the narrow base of the tritosternum, I placed this genus into the family Trachyuropodidae . Only one other genus ( Leonardiella Berlese, 1903 ) of Trachyuropodidae has deep opisthogastric furrows posterior to coxae IV. Leonardiella and Trachyibana differ in the shape of the idiosoma (pentagonal in Leonardiella and suboval or lemon-shaped in Trachyibana ), and in the width of the anterior area of the marginal shields—broad in Leonardiella (two or three times broader than it is in the caudal area) and narrow in Trachyibana (as narrow as in the caudal area).