Heteroborips fastigatus, Smith & Beaver & Cognato, 2020

Smith, Sarah M., Beaver, Roger A. & Cognato, Anthony I., 2020, A monograph of the Xyleborini (Coleoptera, Curculionidae, Scolytinae) of the Indochinese Peninsula (except Malaysia) and China, ZooKeys 983, pp. 1-442 : 1

Heteroborips fastigatus sp. nov. Fig. 63A, B, I

Type material.

Holotype, female, India: NE, Meghalaya, Nokrak N.P., 3 km S Darbokgiri, 25°27'N, 90°19'E, 1400 m, 26.iv.1999, Dombický & Pacholátko (NHMB). Paratype, female, Nepal: Annapurna Region, West Mardi Himal, Modi Khola Tal, oberh. Himalpani, 1420-1480 m, 16.v.2001, Hirthe (RABC).

Diagnosis.

3.4-3.5 mm long (mean = 3.45 mm; n = 2); 2.7-2.8 × as long as wide. This species is distinguished by the tapering, gradually sloping form of the elytra; pronotum conical (type 0) from dorsal view, with rounded anterior margin; elytra tapering after basal 1/3 to an angularly rounded apex; declivity beginning after basal 1/4, gradually, evenly sloping to apex; declivital interstriae weakly outwardly curved in apical 1/4; interstriae granulate only in apical 1/4; and posterolateral margin weakly raised to interstriae 7, not carinate or granulate.

Similar species.

Heteroborips indicus .

Description

(female). 3.4-3.5 mm long (mean = 3.45 mm; n = 2); 2.7-2.8 × as long as wide. Body, head and legs dark brown. Antennae light brown. Head: epistoma entire, transverse, with a row of hair-like setae. Frons weakly convex to upper level of eyes; surface shiny, median 1/3 smooth, impunctate, lateral 2/3 densely and coarsely punctate, setose; puncture bearing a long, erect hair-like seta. Eyes very shallowly emarginate just above antennal insertion, upper part smaller than lower part. Antennal scape long and slender, as long as club. Pedicel as wide as scape, shorter than funicle. Funicle 4-segmented, segment 1 as long as pedicel. Club longer than wide, flat, type 3; segment 1 corneous, transverse on anterior face, occupying approximately basal 2/5; segment 2 narrow, corneous; segments 1-3 present on posterior face. Pronotum: 1.08 × as long as wide. In dorsal view conical, type 0, sides convex, conical anteriorly; anterior margin without serrations. In lateral view tall, type 2, summit pronounced, just behind middle. Anterior slope with densely spaced, broad asperities, becoming lower and more strongly transverse towards summit. Disc subshiny, alutaceous, with moderately dense punctures, punctures setose, each bearing a very long, recumbent or semi-erect, hair-like seta, some longer hair-like setae at margins. Lateral margins obliquely costate. Base transverse, posterior angles broadly rounded. Elytra: 1.9 × as long as wide, 1.86 × as long as pronotum. Scutellum moderately sized, narrowly linguiform, slightly raised above elytra, flat, shiny. Elytral mycangium consisting of two oblong pit mycangia immediately adjacent to scutellum, one on each elytron. Elytral base transverse, edge oblique, humeral angles rounded, parallel-sided in basal 1/3 then gradually tapering to angularly rounded apex. Disc flat shiny, striae weakly impressed, with moderately sized deep punctures separated by two diameters of a puncture, punctures setose, setae semi-erect, slightly longer than puncture diameter; interstriae flat, punctate, punctures minute and widely spaced, setose, setae longer than 2 × interstriae 1 width, semi-erect, hair-like. Declivity beginning after basal 1/4, gradually, evenly sloping to apex, strongly shiny; strial punctures as large as those of disc, striae weakly impressed, punctures setose, setae like those of disc, interstriae weakly laterally broadened from declivital summit to apical 1/3 then narrowed to apex, basal 3/4 of interstriae 1-3 uniseriate punctate, punctures subequal to those of striae, apical 1/4 impunctate, punctures replaced by four granules, granules widely spaced, interstriae 4-8 impunctate and unarmed. Posterolateral margin rounded. Legs: protibiae obliquely triangular, broadest at apical 1/3; posterior face smooth; apical 1/2 of outer margin with six large socketed denticles, their length much longer than basal width. Meso- and metatibiae flattened; with obliquely triangular outer margin with ten large socketed denticles.

Etymology.

L. fastigatus = sloping. In reference to the form of the elytra which slope downwards almost from the base. An adjective.

Distribution.

India (Meghalaya), Nepal.

Host plants.

Unknown.

Remarks.

The holotype is card mounted and ventral characters could not be examined.

Figures

Figure 63. Dorsal, lateral and declivital view of Heteroborips fastigatus holotype, 3.4 - 3.5 mm (A, B, I), H. indicus holotype, 2.2 - 2.4 mm (C, D, J), H. seriatus, 2.5 - 2.9 mm (E, F, K), and H. tristis, 3.9 - 4.0 mm (G, H, L).