Dyscolus silvestris Moret, 2020

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 : 45-47

Dyscolus silvestris Moret sp. nov.

urn:lsid:zoobank.org:act:8DA5B9B7-F332-4D75-AC2D-CEBBD34ADA3C

Figs 52–53

Etymology

Latin adjective meaning ‘forest related’.

Type material

Holotype

ECUADOR • ♂; Napo Province, Termas de Papallacta ; 3300 m a.s.l.; 1 Jul. 2001; P. Moret leg.; “sousbois”; QCAZ.

Paratypes (5 ♂♂, 10 ♀♀)

ECUADOR – Napo Province • 1 ♂, 1 ♀; same collection data as for holotype; CPM • 1 ♂, 1 ♀; Papallacta, Termas Jamanco, Waypoint 41 ; 0°22′24.6″ S, 78°10′5.5″ W; 3410 m a.s.l.; 25 Oct. 2015; P. Moret leg.; MNHN • 1 ♀; same collection data as for preceding; QCAZ • 1 ♂, 3 ♀♀; same collection data as for preceding; CPM • 1 ♂; same collection data as for preceding; COI voucher PM041-02, BOLD sequence SUM103-18; CPM • 1 ♀; same collection data as for preceding; COI voucher in ethanol PM041-06, BOLD sequence SUM104-18; CPM • 2 ♀♀; Lago Papallacta ; 3370 m a.s.l.; 9 Apr. 1986; A. Vigna; CPM • 1 ♀; Papallacta ; 2700 m a.s.l.; 6–8 Apr. 1979; H. Frania leg.; UASM • 1 ♂; Lago Papallacta ; 0°20′29″ S, 78°10′23″ W; 3400 m a.s.l.; 6 Nov. 1999; R. Anderson leg.; CMNC .

Diagnostic description

Habitus: Fig. 52 . Wingless. Body length: 9.1–10.0 mm. Body colour variable, predominantly dark brown with reddish brown areas in some specimens; legs, antennae and mouthparts reddish brown. Elytral microsculpture isodiametric. Head broad and convex, neck slightly constricted, eyes moderately bulging. Pronotum subcordiform, the base much narrower than the apex; sides arcuate anterad, markedly sinuate posterad; hind angles obtuse, sharp; two pairs of lateral setae. Elytra subovate, moderately convex; striae entire, well impressed; intervals flat. Third elytral interval with 3–4 discal setae. Legs: protarsi of the male much broader than those of the female. Fifth metatarsomere asetose ventrally. Last visible abdominal ventrite with one pair (♂) or two pairs (♀) of setae along its apical margin. Male genitalia: Fig. 53 . Median lobe arcuate, shortly and bluntly triangular at apex, endophallus unarmed. Female genitalia: unstudied.

Comparisons

Dyscolus silvestris Moret sp. nov. is similar to the shorter and broader individuals of Dyscolus denigratus . The main differences are: head slightly bigger and broader; sides of the pronotum sinuate basally, hind angles sharply obtuse (completely rounded in D. denigratus ); femora of the male not swollen as in D. denigratus . The apex of the median lobe of the male genitalia has a shorter apex, and the endophallus is entirely unarmed (with a heavily sclerotized area in D. denigratus ).

Habitat

Upper montane forest on the Amazonian slope of the Andes , from 2700 to 3400 m a.s.l. This species lives in the leaf litter.

Geographic distribution

Only known from the type locality around Papallacta in Northern Ecuador, probably microendemic.

Figures

Figs 52–53. Dyscolus silvestris Moret sp. nov., male holotype (QCAZ). 52. Habitus. 53. Male aedeagus, median lobe in lateral view.