Dyscolus incommunis 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 : 15-16

Dyscolus incommunis Moret sp. nov.

urn:lsid:zoobank.org:act:696C59CA-E6A8-46CA-847F-CD9DA0167F60

Figs 9–10

Etymology

Latin adjective meaning ‘not together, not in common’; alluding to the fact that this species is not identical to D. aquator Moret sp. nov., despite the results of BIN analysis.

Type material

Holotype

ECUADOR • ♂; Pichincha Province, Tandayapa, Bellavista Lodge, Waypoint 81; 0°0′56.6″ S, 78°40′49.1″ W; 2250 m a.s.l.; 2 Nov. 2015; P. Moret leg.; bromeliad fallen on the ground; QCAZ.

Paratypes (2 ♂♂)

ECUADOR – Pichincha Province • 1 ♂; same collection data as for holotype; leaf litter at night; COI voucher PM081-02, BOLD sequence SUM214-18; CPM • 1 ♂; Tandayapa, Bellavista Lodge ; 0.0147º S, 78.6833º W; 2200 m a.s.l.; 9 Nov. 2010; D. Maddison leg.; COI voucher PM505, BOLD sequence SUM305-18; OSAC .

Diagnostic description

Habitus: Fig. 10 . Wingless. Body length: 9.6–10.7 mm. Shiny piceous black, femora dark brown, the rest of the legs, antennae and mouthparts reddish brown. Elytral microsculpture transverse. Eyes moderately bulging, genae flat, mandibles long and acute. Pronotum convex, relatively big, elongate, narrowed backward but not cordiform; sides slightly sinuate posterad, hind angles obtuse and blunt; two pairs of lateral setae. Elytra elongate, humeri obliquely sloped, striae entire, finely impressed, with slight traces of punctation; third interval with three setae; subapical sinuation moderate; apical area triangle-shaped, rounded at apex. Last visible abdominal ventrite with one pair (♂) or two pairs (♀) of setae along its apical margin. Legs slender; fourth metatarsomere with or without subapical dorsolateral setae (one seta is present on the external lobe of the paratype), apical lobes parallel, the outer lobe 1.5 times longer than the inner lobe. Male genitalia: Fig. 9 . Median lobe evenly arcuate, apex finely acute and slightly sinuate in lateral view, apex of the endophallus with a sclerotized structure formed of scales and denticles. Female genitalia: unstudied.

Comparisons

Although the BIN analysis suggests that D. aquator Moret sp. nov. and D. incommunis Moret sp. nov. are conspecific, the latter is differentiated from the former by important and stable morphological characters: sides of the pronotum less sinuate with obtuse hind angles; elytra broader and more convex, humeri not completely effaced, subapical sinuation weak, no apical tooth. The aedeagus′ median lobe is more arcuate, with a shorter apex and a sclerotized area differently shaped in the endophallus. Both species are sympatric in their type locality (Bellavista Lodge), but they live in different habitats.

Habitat

Montane forest on the Western slope of the Andes , at around 2250 m a.s.l. Unlike its closest relatives, this species has been collected on the forest ground, far from any stream, in the leaf litter and in fallen bromeliads.

Geographic distribution

Southern end of the Chocó biogeographic region in northwestern Ecuador. Only known from the type locality, probably microendemic.

Figures

Figs 7–12. 7–8. Dyscolus aquator Moret sp. nov. 7. Habitus of the male holotype (QCAZ). 8. Aedeagus, median lobe in lateral view. 9–10. D. incommunis Moret sp. nov. 9. Aedeagus, median lobe in lateral view. 10. Habitus of the male holotype (QCAZ). 11–12. D. rivinus Moret sp. nov. 11. Apex of the elytra. 12. Aedeagus, median lobe in lateral view.