Genus Trichorhina Budde-Lund, 1908

Trichorhina Budde-Lund 1908: 293 .

Type species: Bathytropa thermophila Dollfuss, 1896 by subsequent designation (see Schmalfuss & Ferrara (1978)).

Diagnosis: Small in size, not exceeding 6 mm. Most of species white or greyish owing to more or less reduced pigmentation. Dorsal body covered with large scale-spines supported with skeleton. Frontal line absent. Supraantennal line present. Small eyes with less than 10 ommatidia, often reduced or absent. Pleon normally not interrupted from pereon. Telson triangular (rounded in Trichorhina simoni (Dollfus, 1893) and T. caeca (Vandel, 1952)) . Second antenna short, flagellum with first joint much shorter than second one.