Derallus terranovae Oliva, 1983

Gonzalez-Rodriguez, Liza M., García-Hernández, Andrea L. & Clarkson, Bruno, 2017, First records of water scavenger beetle species (Coleoptera, Hydrophilidae) from Quindío Department, Colombia, Check List 13 (5), pp. 605-620 : 612

Derallus terranovae Oliva, 1983 ( Figs 13, 37)

Derallus terranovae Oliva 1983: 348 .

Diagnosis. Body 2.20–2.30 mm long. Dorsal coloration evenly black. Punctation on head fine and dense, on pronotum fine and sparse, on elytra strongly impressed forming longitudinal striae. Mesoventral process elevated with a tooth-like projection on anterior margin and a posterior elevation. Parameres shorter than median lobe, widened and rounded at apex; median lobe cylindrical, apex rounded; phallobase somewhat as long as parameres.

Geographic distribution. Brazil (Amazonia), Panama, and Venezuela. First record from Quindío Department and from Colombia.

Material examined. Colombia, Quindío Department, La Tebaida Municipality, Pizamal neighborhood, 04°41ʹ30.1ʺ N, 075°83ʹ98.1ʺ W, 1057 m a.m.s.l., 2014-X- 10, L.M. González coll., CIUQ 10508–10511 (5 males, 3 females).

Remarks. Specimens were collected in marshes on muddy substrate and on submerged vegetation.

Hemiosus aequatorialis Oliva, 1994 ( Figs 14, 38) Hemiosus aequatorialis Oliva 1994: 283 .

Diagnosis. Body 2.30–2.50 mm long. Head and pronotum black with greenish to reddish metallic sheen; elytra pale brown with black maculae. Punctation on head and pronotum dense and strongly impressed; elytral striae strongly impressed. Mesoventral process strongly elevated, deeply hollowed longitudinally, in lateral view anterior margin strongly projected as a tooth, followed by a smaller elevation almost as high as anterior tooth, posterior portion also salient. Parameres longer than median lobe, apices slightly acuminate, concave on outer margin, straight on inner margin; median lobe wide basally, slightly slender and rounded at apex; phallobase somewhat shorter than parameres.

Geographic distribution. Peru and Venezuela. First record from Quindío Department and from Colombia.

Material examined. Colombia, Quindío Department, La Tebaida Municipality, Pizamal neighborhood, 04°24ʹ 47.5ʺ N, 075°51ʹ11.1ʺ W, 1030 m a.m.s.l., 2015-I-29, L.M. González coll., CIUQ 10628–10632 (22 males, 16 females). Córdoba Municipality, Santo Domingo neighborhood, 04°24ʹ20.3ʺ N, 075°43ʹ29.1ʺ W, 1166 m a.m.s.l., L.M. González coll., CIUQ 10634 (2 males, 1 female). Quimbaya Municipality, Manabí neighborhood, 04°36ʹ48.4ʺ N, 075°51ʹ58.9ʺ W, 965 m a.m.s.l., 2015- II-03, L.M. González coll., CIUQ 10635 (6 males, 5 females).

Remarks. Specimens were collected along riverbanks and in temporary ponds on muddy leaf litter as well as on muddy/stony and stony/sandy substrates.