Hydrochus astrictus Perkins

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 : 40

Hydrochus astrictus Perkins

Figs. 4 , 42 , 54 , 70

Hydrochus astrictus Perkins 2020c: 66

Originally described from Peru. Habitus and male genitalia images are given in Perkins (2020c), and herein ( Fig. 42 ). New locality and deposition records for Bolivia and Brazil are given below.

Material examined (16): Bolivia: Santa Cruz, 60 mi. N . Santa Cruz, Saavedra Exp. Sta. , 27–30.xii.1959, leg. Robert Cumming (7 NMNH) ; Prov. Sara , 2 km NW of Santa Rosa, 21.ii.1969, leg. A. Martinez & R.E. Woodruff (4 NMNH) . Brazil: Mato Grosso, Caceres , MT., (16°4’S, 57°41’W), 2–4.xii.1955, leg. M. Alvarenga (4 CAS) ; Rio Bento Gomes (Pantanal); Flussabschnitt bei Periquito , (15°54’S, 56°33’W), 1.i.1993 – 30.xii.1994, leg. E. Stuhr (30) (1 NMW) .

Figures

FIGURE 4. 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.

FIGURES 53–54. Geographical distributions. 53. H spanglerorum species group. 54. H collaris species group.