Seticotasteromimus crassirostris Germann, 2022

Germann, Christoph, 2022, A new species of Seticotasteromimus Germann from the Cameron Highlands of Malaysia (Coleoptera, Curculionidae, Molytinae), Zootaxa 5100 (3), pp. 445-450 : 445-449

Seticotasteromimus crassirostris Germann sp. nov.

Figs. 1 (A–J), 2 (A–F)

Holotype male: “ MALAYSIA, W. PAHANG, Cameron Highlands, 2004, Tanah Rata , 1500–1800m, P. Pacholátko leg., 2.–26.iii.” // Holotype Seticotasteromimus crassirostris sp. nov. des. C. Germann 2021 [red label] // Barcode label: NMB-COLEO0010004 ( NMB) .

Body and genitalia ( Figs 1A–J ). Size: 2.2 mm. Body dark brown to auburn, antennae and tarsi auburn.

Head globular, hidden in pronotum; frons vertical, rostrum straight, 2.4 times longer than wide, parallel sided, rather thick, thicker than diameter of femora; surface striate, weakly bowed in lateral view; eyes below level of rostral dorsum, vertical oval, flat. Antennae inserted in middle of rostrum; scrobes oblique, posterior ends approximate each other. Antennal scape shorter than width of rostral apex. Antennal funicle consisting of 7 segments, all transverse. First segment as wide as apex of thickened scape, following four segments transverse (L/B: 0.6), segments 6 and 7 broadened (L/B: 0.5, 0.42), club oval. Integument: Frons with sparse thin and bowed scales, rostrum with rather dense standing raised, elongately clubbed scales; shorter scales on antennal scape and first segment of funicle.

Prothorax longer than wide (length/width: 1.08); bell-shaped, widest in last third, constricted at first fourth, irregularly and coarsely punctate, spaces in between reduced to thin margins. Integument consisting of thin, bowed thin scales and long (mostly more than 4 x longer than wide) raised, lanceolate to slightly clubbed light brown scales. Apex of these scales rounded. Scutellum visible, pentagonal.

Elytra elongate (length/width: 1.2), faintly rounded laterally, widest just behind shoulders. Hind wings present, longer than elytra. In lateral view elytra almost flattened on disc and regularly rounded on declivity. Ten elytral striae, striae very coarsely and deeply, regularly punctate, wider than intervals. Intervals regularly set alternately with thin and bowed scales, and 4–5 times longer than wide, raised scales. Elytral apex at inner side without stridulation ridges.

Underside coarsely punctate, four apparent ventrites, suture between first two (fused) ventrites indistinct ( Fig. 1F ). Coxae separated from each other as follows: procoxae by 1.5 their diameter, mesocoxae and metacoxae by twice their diameter ( Fig. 1B ).

Legs robust. Femora edentate, tibiae each uncinate at outer angle. Third tarsomere bilobed. Claw segment long and thin, claws simple, free. Integument consisting of both, thin and bowed scales, and long (4–5 times longer than wide) raised, weakly clubbed (weakly diverging from base to apex, or almost parallel sided) light brown scales.

Male genitalia: Penis laterally regularly rounded, apex blunt, edges rounded, in lateral view bowed in an angle of about 45°; penis body with ventral and lateral sides well sclerotized, dorsal surface membranous; apodemes one third shorter than penis body; tegmen ring shaped with strong apodeme and feebly sclerotized parameroid lobes ( Figs 2A–C ). Sternite IX with u-shaped fork ( Fig. 2D ). Tergites VII–VIII as in figures 2E–F.

Female unknown.

Etymology: The new species Seticotasteromimus crassirostris is named after its thick rostrum compared to both sister species of the genus ( Figs 3A–C ).

Remark on natural history: The specimen was collected by Petr Pacholátko in forest at an elevation of between 1500 and 1800 m by sweeping in the forest canopy with a net (diameter 80 cm) on a telescopic folding pole of about 5 m length.

Figures

FIGURES 1A–J. Habitus and details of the male holotype of Seticotasteromimus crassirostris. A–C.—habitus dorsal, ventral and lateral. D.—dorso-lateral view of head and rostrum. E.—raised scales towards elytral declivity F.—ventrites. G.—ventral view of fore margin of pronotum and head. H.—pentagonal scutellum. I.—disc of pronotum. J.—antennal funicule of S. crassirostris. K.—Antennal funicle of S. jarawa (Photos: C. Germann).

FIGURES 2A–F.—Genitalia of Seticotasteromimus crassirostris. 2A–C. Penis and tegmen in A. ventral, B. dorsal and C. lateral view. D.—Sternite IX. E.—Tergite VII. F.—Tergite VIII, with two hemisternites VIII. G–I.—Raised scales on elytra of species of Seticotasteromimus. G.—S. jarawa. H.—S. brunomanseri. I.—S. crassirostris (Photos: C. Germann)

FIGURES 3A–C. Habitus of A.—Seticotasteromimus jarawa. B.—S. brunomanseri. C.—S. crassirostris (Photos: C. Germann).