Bidessodes hygrobius Young, 1986

Miller, Kelly B., 2017, A review of the Neotropical genus Bidessodes Regimbart, 1895 including description of four new species (Coleoptera, Adephaga, Dytiscidae, Hydroporinae, Bidessini), ZooKeys 658, pp. 9-38 : 27

Bidessodes hygrobius Young, 1986 Figs 55-60, 100

Bidessodes (Bidessodes) hygrobius Young, 1986: 216; Biström, 1988: 7; Nilsson, 2016: 98.

Diagnosis.

This species does not have a carinate prosternum in either male or female. The prosternal process is longitudinally approximately flat, the lateral margins are subparallel, the apex is pointed. The male mesotibia and the male metafemur and metatrochanter are not noticeably modified (Fig. 60). The male abdominal ventrite VI is unmodified. The male median lobe is robust in lateral aspect, abruptly curved, apically pointed with a distinct ventral expanded angulation and a subapical projecting lobe with the apex elongate pointed (Fig. 56). In ventral aspect it is similarly robust with sinuate lateral margins (Fig. 57). The basal segment of the lateral lobe is small and irregular (Fig. 58). The apical segment is extremely irregular with a prominent transverse apical lobe which is hooked on the ventral apex (Fig. 59). Specimens are robust with maculate elytra (Fig. 55).

Distribution.

Known from lowland Venezuela and French Guiana (Fig. 100).