Redescription of the stygobitic shrimp Troglocaris (Xiphocaridinella) jusbaschjani Birštein, 1948 (Decapoda: Caridea: Atyidae) from Agura River, Sochi, Russia, with remarks on other representatives of the genus from Caucasus.

The complete re-description of Caucasian local endemic stygobitic atyid shrimp Troglocaris (Xiphocaridinella) jusbaschjani Birštein, 1948 is firstly presented after its original description given by Dr. Ya. A. Birštein (1948) under the name Troglocaris schmidti jusbaschjani. The species is still known exclusively from the type locality, hydrogen sulfide bathes of the small Agura River, Sochi area, Russian Federation. Remarks on morphology, coloration of both females and males and data on ecology of Troglocaris (Xiphocaridinella) jusbaschjani Birštein, 1948 as well as remarks on morphology of relative congeneric species from Caucassus, Troglocaris (Xiphocaridinella) kutaissiana (Sadowsky, 1930) (type species of the subgenus) and Troglocaris (Xiphocaridinella) fagei Birštein, 1939, are provided. Discussion on the validity of some subgenera within the genus Troglocaris s. str. Dormitzer, 1853 are also presented.