Psychrodromus

Zaibi, Chahira, Scharf, Burkhard, Viehberg, Finn Andreas, Keyser, Dietmar & Kamoun, Fekri, 2013, Preliminary report on the living non-marine Ostracoda (Crustacea) from Tunisia with the description of a new Psychrodromus species, Zootaxa 3626 (4), pp. 499-516 : 507

Key to the species of the genus Psychrodromus (after Karanovic 2012, modified)

1. Length of the carapace at most 1.4 mm .................................................................... 2

- Length of carapace more than 1.6 mm ..................................................................... 6

2. Posterior seta/claw on the UR with a filamentous tip...................................... P. fontinalis (Wolf, 1920)

- Posterior seta/claw on the UR without a filamentous tip....................................................... 3

3. Posterior claw of the UR at the most ½ as long as anterior claw.......................... P. turcicus (Hartmann, 1964)

- Posterior claw of the UR longer than ½ of the anterior claw.................................................... 4

4. Dorsal margin of the carapace only slightly arched, carapace elongated, male clasping organ of maxilliped beside the 2 bristles one respectively two truncated setae......................................................... P. tunisicus n. sp.

- Dorsal margin of the carapace distinctly arched, not elongated, male clasping organ without truncated setae............. 5

5. Posterior margin of the carapace broadly rounded, posterior seta/claw on the UR very broad and very slightly narrowing from the basis to the tip....................................................... P. o l iv a c e u s (Brady & Norman, 1889)

- Posterior margin of the carapace slightly inclined, posterior seta/claw on the UR very narrow distally...................................................................................... P. betharrami Danielopol & Baltanás, 1993

6. Dorsal margin highly arched, greatest H in the middle from which point margin slopes equally towards anterior and posterior ends...................................................................... P. peristericus (Petkovski, 1959)

- Dorsal margin less arched, greatest H situated around the middle from which point margin inclined towards anterior end and more rounded towards posterior end........................................ P. robertsoni (Brady & Norman, 1889)