Taxon classification Animalia Isopoda Agnaridae

Genus Protracheoniscus Verhoeff, 1917

Diagnosis.

Body length variable, up to 25 mm; tergites always smooth; head with short or developed lateral lobes; antenna variable in size, with flagellum of two articles; pereon epimera I with rounded posterolateral corner; telson triangular with more or less concave sides; male pleopod exopodite I with short to long hind lobe, endopodite I straight; clinger or runner type according to the eco-morphological classification proposed by Schmalfuss (1984).