Dyscolus Dejean, 1831

Moret, Pierre & Murienne, Jérôme, 2020, Integrative taxonomy of the genus Dyscolus (Coleoptera, Carabidae, Platynini) in Ecuadorian Andes, European Journal of Taxonomy 646, pp. 1-55 : 10

Genus Dyscolus Dejean, 1831

Dyscolus Dejean, 1831: 437 . Type species: Dyscolus memnonius Dejean, 1831 , by subsequent designation ( Chaudoir 1878: 343).

Hydrodyscolus Moret, 1996: 498 . syn. nov.

Dyscolus – Moret 1989: 143.

The revision of the sequenced species led us to re-examine related material and to describe three new species of which we do not have DNA data, but which can be readily separated from the sequenced taxa ( Dyscolus placitus Moret sp. nov., D. rivinus Moret sp. nov. and D. verecundissimus Moret sp. nov.).

All the species under study share the following characters, which are, therefore, not repeatedly mentioned in the descriptions of the new species: labrum with six setae near apical margin; clypeus with two pairs of setae; two supraorbital setae each side; mentum with one pair of setae, submentum with two pairs of setae (except in the species of the hirsutus and verecundus groups, which may have additional submental setae); pronotum with two pairs of lateral setae, the distal one located near the widest point of pronotum, the basal one near or at the laterobasal angle (except D. donosoi Moret sp. nov. which lacks the basal seta); parascutellar setiferous pore present; metathoracic wings reduced and metepisternum very short (except in D. eleonorae Moret sp. nov.).

The order in which these 25 new species are presented below is based on broad biogeographic and ecological groupings and on resemblances in external morphology, in order to make comparisons and identifications easier. The five resulting sections are: 1/ full-winged montane forest species (pp. 11–13); 2/ riparian wingless species of the montane forest (pp. 13–18); 3/ wingless, non-riparian species of the montane forest (pp. 18–36); 4/ riparian species of the páramo (pp. 36–42); 5/ non-riparian species of the páramo (pp. 42–51).

All the new species are authored by P. Moret.