Hydrochus pietersenae Makhan, 1993

Perkins, Philip D., 2021, Taxonomy of water beetles in the genus Hydrochus Leach, 1817, from Bolivia, Brazil and Paraguay (Coleoptera: Hydrochidae), Zootaxa 4994 (1), pp. 1-93 : 49

Hydrochus pietersenae Makhan

Figs. 5 , 43 , 70

Hydrochus pietersenae Makhan 1993: 68

Originally described from Bolivia. Other than the holotype and paratypes only a single male was examined, and imaged ( Figs. 5 , 43 ) .

Material examined (1): Bolivia: Santa Cruz, 3.7 km SSE Buena Vista, Hotel Flora y Fauna , elev. 400 m (17°29’S, 63°33’W), 23–30.iv.2004, leg. A. Cline and J. Wappes (1 SEMC) .

Remarks. I have examined the male genitalia of the holotype and four paratypes of H. pietersenae Makhan (HNHM) . All five specimens have the form of the distal piece as illustrated herein ( Fig. 43 ). The male genitalia drawing in Makhan (2001), which does not include two of the three processes of the distal piece, is inaccurate and misleading. Images of the male genitalia of the holotype are given herein. The holotype is in poor condition, broken due to the poor specimen technique of a prior worker. Therefore, a different specimen, from Bolivia, has been used for the habitus images.

Figures

FIGURE 5. Dorsal habitus of Hydrochus species in study area.

FIGURE 70. Pictorial aid to species groups of Hydrochus from Bolivia, Brazil and Paraguay, using male genitalia. Not to same scale.

FIGURES 42–43. Habitus and male genitalia. 42. Hydrochus astrictus Perkins. 43. Hydrochus pietersenae Makhan.