Dyscolus piscator 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 : 37-38

Dyscolus piscator Moret sp. nov.

urn:lsid:zoobank.org:act:C207DE54-A6E2-4C10-AF45-EDBE8BAF3D22

Figs 37, 40, 41 (below)

Etymology

Latin adjective meaning ‘fisherman’, in allusion to the feeding habits of this riparian species which preys on small water invertebrates.

Type material

Holotype

ECUADOR • ♂; Napo Province, Guamaní, Paso de la Virgen, Waypoint 283 ; 0°21′0.6″ S, 78°11′52.4″ W; 3890 m a.s.l.; 11 Mar. 2017; P. Moret and M. Gobbi leg.; QCAZ.

Paratypes (2 ♂♂, 1 ♀)

ECUADOR • 1 ♂; same collection data as for holotype; MNHN • 1 ♂; same collection data as for holotype; CPM • 1 ♀; same collection data as for holotype; COI voucher in ethanol PM283-01, BOLD sequence SUM239-18; CPM .

Diagnostic description

Habitus: Fig. 37 . Wingless. Body length: 9.6–10.9 mm, bigger than D. placitus Moret sp. nov. Ventral surface paler, abdominal ventrites entirely reddish-testaceous. Elytral microsculpture slightly less transverse. Head bigger, genae slightly but distinctly convex in dorsal view (flat in D. placitus Moret sp. nov.); apex of the labrum bisinuate (straight in D. placitus Moret sp. nov.); mandibles much longer, finely acute at apex (length of the right mandible / width of the frons between the anterior setae = 0.95 in D. piscator Moret sp. nov., 1.21 in D. placitus Moret sp. nov.). Third elytral interval with 3–4 setae, fifth interval with 2–4 setae, seventh interval with 0–1 seta; 11–13 umbilicate setae along the lateral margin (17–20 in D. placitus Moret sp. nov.). Male genitalia: Fig. 40 . Apex of the median lobe slightly curved, not strongly bent downwards as in D. placitus Moret sp. nov., with a rounded tip, not hooked as in D. placitus Moret sp. nov.

Habitat

Riparian in the upper montane forest with Polylepis , at around 3900 m a.s.l. Under stones at the edge of a small stream. This biotope is 50 m away from that of D. placitus Moret sp. nov.

Geographic distribution

Microendemic species, restricted to the Guamaní area in the Eastern Cordillera.

Figures

Figs 36–41. Dyscolus spp., habitus (36–38) and aedeagus, median lobe in lateral view (39–40) and apex of the median lobe (41). 36. Dyscolus arauzae Moret sp. nov., male holotype (QCAZ). 37. D. piscator Moret sp. nov., male holotype (QACZ). 38. D. placitus Moret sp. nov., male holotype (MNHN). 39. D. arauzae Moret sp. nov. 40. D. piscator Moret sp. nov. 41. D. placitus Moret sp. nov. (above) and D. piscator Moret sp. nov. (below).