Ambrosiophilus wantaneeae, 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

Ambrosiophilus wantaneeae sp. nov. Fig. 16C, D, F

Type material.

Holotype, female, Thailand: Chiang Mai, Doi Pui, 1400 m, 17.iv.-8.v.2006, W. Puranasakul, ex EtOH trap (NHMUK). Paratypes, female, as holotype except: 25.iv.-16.v.2005 (QSBG, 1; RABC, 1); as previous except: flight intercept trap (MSUC, 1); as previous except: 18°50'23"N, 98°53'53"E, 1200-1300 m, 30.iv.2014, S. Sanguansub et al., ex EtOH trap (RABC, 1).

Diagnosis.

2.0-2.1 mm long (mean = 2.03 mm; n = 4); 2.63-2.77 × as long as wide. This species is distinguished by declivital interstriae 1 unarmed, 2 armed by four or five coarse granules along its length, interstriae 3 with four or five slightly smaller granules; declivital striae 1 and 2 very weakly impressed; and pronotum from dorsal view conical (type 0) to subelongate (type 7), lateral view long (type 7).

Similar species.

Ambrosiophilus osumiensis , A. papilliferus .

Description

(female). 2.0-2.1 mm (mean = 2.02 mm; n = 4); 2.63-2.67 × as long as wide. Body dark brown to pitchy black, antennae and legs light brown. Head: epistoma entire, transverse, with a row of hair-like setae. Frons weakly convex to upper level of eyes; surface subshiny, punctate; punctures moderately dense, becoming shallower and sparser on reticulate upper part. Eyes deeply emarginate just above antennal insertion, upper part smaller than lower part. Submentum narrow, triangular, slightly impressed. Antennal scape regularly thick, approximately as long as club. Pedicel as wide as scape, shorter than funicle. Funicle 4-segmented, segment 1 shorter than pedicel. Club approximately circular, type 3; segment 1 corneous, transverse on anterior face, occupying approximately basal 1/3; segment 2 narrow, corneous; segments 1 and 2 present on posterior face. Pronotum: 1.0-1.1 × as long as wide. In dorsal view conical and elongate, type 5, sides almost parallel in basal 1/2, conical anteriorly; anterior margin without serrations. In lateral view elongate, disc as long as anterior slope, type 7, summit not pronounced, at midpoint. Anterior slope with widely spaced, small asperities, becoming lower and more strongly transverse towards summit. Disc strongly shiny with sparse, small, deep punctures bearing short, fine, erect hair-like setae. Some longer hair-like setae at margins. Lateral margins obliquely costate. Base transverse, posterior angles broadly rounded. Elytra: 1.6-1.7 × as long as wide, 1.6-1.7 × as long as pronotum. Scutellum small, triangular, flush with elytra, flat, shiny. Elytral base transverse, edge oblique, humeral angles rounded, parallel-sided in basal 3/4, then broadly rounded to apex. Disc shiny, striae not impressed, parallel, with moderately coarse, shallow punctures separated by 1-2 × their diameter, without hair-like setae; interstriae flat, finely punctate, punctures more widely separated than those of striae, with fine, erect hair-like setae. Declivity shiny, steep, strongly convex; strial punctures larger than on disc, striae 1 and 2 very weakly impressed; interstriae 1 without granules, interstriae 2 with four or five coarse granules, interstriae 3 and 4 with four or five slightly smaller granules, each granule with a moderately long, erect hair-like seta. Posterolateral margin rounded, unarmed. Legs: procoxae contiguous; prosternal coxal piece short, pointed. Protibiae slender, broadest at apical 1/3; posterior face smooth; apical 1/2 of outer margin with six moderate socketed denticles, their length slightly longer than basal width. Meso- and metatibiae flattened; outer margins evenly rounded with eight small socketed denticles.

Etymology.

The species is named for Ms. Wantanee Puranasakul (then at Chiang Mai University, Thailand) who collected several new species of Scolytinae during her MSc studies. Noun in genitive.

Distribution.

Thailand.

Host plants.

Unknown.

Figures

Figure 16. Dorsal, lateral and declivital view of Ambrosiophilus sulcatus holotype, 3.4 - 4.5 mm (A, B, E), and A. wantaneeae holotype, 2.0 - 2.1 mm (C, D, F).