Koma

Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 57

Koma group

Only the single unusual species H. koma is included in this group ( Fig. 86 ). This species has a very unusual habitus, and the male leg dimorphisms differ from those of other groups. The aedeagus of H. koma is very unusual, and cannot be reasonably compared with that of other groups ( Figs. 88 ). Hydraena koma , known only from the male holotype, was collected at an elevation of 1100 m in Area 1, very near the border with Area 13 (map Fig. 469 ). The specimen was "washed from margins of small pool of a steep, rocky, forest stream at confluence with river; gravel, cobbles, wet rock microhabitats". Additional species in this group can be expected.

Figures

FIGURE 86. Hydraena koma, holotype, dorsal and lateral habitus, and venter.

FIGURES 88–89. Aedeagi of holotypes. 88. H. koma. 89. H. colorata.

FIGURES 467–470. Geographical distributions of Hydraena species.