Diasynurella, BEHNING, 1940

Palatov, Dmitry M. & Marin, Ivan N., 2023, Diversity of the Caucasian genus Diasynurella Behning, 1940 (Amphipoda: Crangonyctidae) with description of four new species, Arthropoda Selecta 32 (1), pp. 23-55 : 52

THE DIFFERENTIAL KEY TO THE KNOWN SPECIES OF THE GENUS DIASYNURELLA BEHNING, 1940

1. All segments of urosome are free; uropod III is much longer than telson ........................................................... ....................... Diasynurella kiwi Marin et Palatov sp.n.

– Urosomite I completely free, urosomites II–III fused; uropod III is subequal to telson in length or shorter ......... 2

2. Chela of gnathopod II is relatively short, about as long as wide, oval in shape ......................................................... .......... Diasynurella khalabensis Palatov et Marin sp.n.

– Chela of gnathopod II is clearly elongated, longer than wide, rectangular in shape ............................................ 3

3. Ramus of uropod III without lateral spines ..................... ...................... Diasynurella wachuschtii Behning, 1940

– Ramus of uropod III with several lateral spines ............. 4

4. Cleft of apical margin of telson clearly longer than half its length ............................................................................... ........ Diasynurella dzhamirzoevi Palatov et Marin sp.n.

– Cleft of apical margin of telson shorter or equal to half of its length .......................................................................... ................ Diasynurella cavatica Palatov et Marin sp.n.