Figure 2 : Morphology of male pleopod 1 for (sub)species delimitation. A) ventral view of complete adult male (ZMH K-60856, lineage I; head facing upwards), B) male pleopod 1 of H. bicuspis tepidus , C) male pleopod 1 of H. bicuspis bicuspis, D) and E) pleopod 1 of adult males (ZMH K-60196 and ZMH K-60856, both lineage I) and F) pleopod 1 of juvenile male (ZMH K-60066, lineage I). C) and D) redrawn after Wolf (1962). Arrows indicate the distal part of pleopod 1, which is supposed to show species-specific differences (laterally rounded in H. b. tepidus, distinct corner in H. b. bicuspis) . A), D), E) and F) were taken with a CLSM. Scale bar = 100 µm