Tepuidessus Spangler, 1981

Kodada, Jan, Hendrich, Lars & Balke, Michael, 2018, Tepuidessus grulai sp. nov. from Acopán Tepui in Venezuela (Coleoptera: Dytiscidae: Hydroporinae: Bidessini), Zootaxa 4434 (3), pp. 561-572 : 562

Tepuidessus Spangler, 1981

Type species. Tepuidessus breweri Spangler, 1981 , by original designation.

Revised diagnosis for Tepuidessus . Black Bidessini with dorsal surface densely setose; clypeus not modified; occipital line absent; basal striae on pronotum and elytra absent or present; sutural line on elytron absent; longitudinal elytral carina on disc absent; basal epipleural transverse carina absent; metathoracic wings reduced to short membranous vestiges without any sign of venation ( Fig. 6 ); median lobe simple, with narrowed apical part in ventral view; parameres two-segmented. Species inhabiting tepui plateaus in Venezuela.

Note that the presence/absence of pronotal and/or elytral striae has also been shown to possibly vary even within closely related species of other genera, e.g. Limbodessus Guignot, 1939 (see Balke et al. 2015).

Figures

FIGURE 6. Tepuidessus grulai sp. nov., reduced metathoracic wing (A), lateral view of last ventrite in female (B) and pronotum, punctation and basal stria as well as basal stria on elytron (C).