Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 86. (Budapest 1994)

Makhan, D.: Thirty-five new Hydrochus species from the Old and the New World (Coleoptera: Hydrophilidae)

punctures. Pronotum longer than wide, lateral side smooth. Disc with five large deep depressions. Anterior margin of pronotum with three depressions, one at the centre, two behind this. Posterior margin with two depressions. Elytral length 2.0 mm, elytra widest on posterior third, lateral side smooth, striai punctures wider than interstriae, interstriae flat. Apical holes absent. Elytral apices rounded. Male genitalia (Fig. 28): Basal piece short, parameres longer than median lobe. Etymology: This species is named aftermy friend ANDREAS TEUNISSEN. Holotype: male. Bolivia, Prov. Sara, 750 m, J. STEINBACH (date unknown) (only the holotype) (Mus. Berlin). Description (holotype male): Body elongate, length 4.3 mm, width 1.6 mm. Dorsal side shining. Colour of head, pronotum, scutellum and elytra greyish coppery, with a blue-green metallic gloss. Head with dense, fine punctures. Pronotum longer than wide, lateral side with granules. Disc with five large deep depressions. Anterior margin of pronotum with three depressions, one at the centre, two behind this. Posterior margin with two depressions. Elytral length 2.8 mm, elytra widest on posterior third, lateral side smooth, interstriae wider than striae punctures, interstriae flat, tubercle absent. Apical holes absent. Elytral apices rounded. Male genitalia (Fig. 29): Páraméra longer than median lobe, basal piece short. Etymology: This species is named after my sister ELSJE MAKHAN. This species is very similar to H. iduae sp. n. and H. choennii MAKHAN, 1992 from Suriname, but there is a difference in the shape of male genitalia. Páraméra in H. elsjeae with sagittate apices, páraméra in H. iduae with narrowed apices, and in H. choennii with a tubercle on the elytron (MAKHAN 1992). Holotype: male. Paraguay, Cobecionados en Asuncion, 1912, A. BARBERO (MUS. Berlin). - Paratype: 1 male (Mus. Budapest). Description (holotype male): Body length 2.4 mm, width 0.9 mm. Dorsal side shining. Colour of head, pronotum, scutellum and elytra brown with a blue-green metallic gloss. Head with fine punctures. Pronotum longer than wide, lateral side smooth. Disc with five large deep depressions. Anterior margin of pronotum with three Figs 29-35. Male genitalia of holotypes. 29 = Hydrochus elsjeae sp. n., 30 = H. soesilaae sp. n., 31 = H. iduae sp. n., 32 = H. elineae sp. n., 33 = H. vanvondeli sp. n., 34 = H. bernardi sp. n., 35 = H. hanoewanti sp. n. (scale = 0.25 mm) Hydrochus elsjeae sp. n. (Fig. 29) Hydrochus soesilaae sp. n. (Fig. 30)