Anisandrus paragogus, 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

Anisandrus paragogus sp. nov. Fig. 23C, D, J

Type material.

Holotype, female, 西藏 73084 察隅洞穷 1973.7.15 桢楠 采集者: 黄复生 [China: Tibet [Xizang], Dongqiong, Chayu, 15.vii.1973, Fusheng Huang, ex Machilus sp.] (NMNH).

Diagnosis.

2.8 mm long (n = 1); 2.55 × as long as wide. This species is distinguished by the mesonotal mycangial tuft absent; declivital interstriae uniseriate granulate on basal 1/2; declivital face opalescent; declivital interstrial setae erect, 3 × width of an interstria; and a row of serrations on anterior margin of pronotum.

Similar species.

Anisandrus dispar , A. maiche , Xylosandrus germanus .

Description

(female). 2.8 mm long (n = 1); 2.55 × as long as wide. Body brown. Legs and antennae light brown. Head: epistoma entire, transverse, with a row of hair-like setae. Frons weakly convex to upper level of eyes, subshiny, punctate; punctures large, shallow, moderately dense; punctures bearing a long, erect hair-like seta. Eyes shallowly emarginate just above antennal insertion, upper part smaller than lower part. Submentum large, distinctly triangular, slightly impressed. Antennal scape regularly thick, shorter than club. Pedicel as wide as scape, shorter than funicle. Funicle 4-segmented, segment 1 shorter than pedicel. Club much longer than wide, obliquely truncate, type 1; segment 1 corneous, encircling anterior face; segment 2 narrow, concave, corneous on anterior face only; sutures absent on posterior face. Pronotum: 0.73 × as long as wide. In dorsal view rounded, type 1, sides convex, rounded anteriorly; anterior margin with a row of seven very large serrations. In lateral view robust and rounded, type 5, disc longer than anterior slope, summit at apical 2/5. Anterior slope with densely spaced, large coarse asperities, becoming lower and more strongly transverse towards summit. Disc subshiny with dense, small, fine punctures bearing short erect hair-like setae, some longer hair-like setae at margins. Lateral margins obliquely costate. Base transverse, posterior angles broadly rounded. Mycangial tuft absent. Elytra: 1.6 × as long as wide, 2.2 × as long as pronotum. Scutellum broad, large, linguiform, 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 flat, opalescent, striae not impressed, with small, shallow punctures separated by 1-2 diameters of a puncture, setose, setae short, in-curved, hair-like; interstriae flat, punctate, punctures strongly confused, setose, setae long, erect hair-like, unarmed by granules. Declivity occupying approximately 1/3 of elytra, steeply rounded, declivital face convex, opalescent; striae distinctly impressed, strial punctures much larger and deeper than those of disc; interstriae impunctate, granulate, granules widely and regularly spaced from base to apex, granules setose, setae 3 × width of interstriae 2, erect, hair-like, interstriae weakly laterally broadened from declivital summit to midpoint then narrowed to apex. Posterolateral margin costate, granulate to interstriae 7. Legs: procoxae narrowly separated. Protibiae obliquely triangular, broadest at apical 1/3; posterior face smooth; apical 1/2 of outer margin with five large socketed denticles, their length longer than basal width. Meso- and metatibiae flattened; outer margins evenly rounded with nine and ten moderate socketed denticles, respectively.

Etymology.

G. paragogos = misleading. In reference to its resemblance to Ambrosiophilus .

Distribution.

China (Xizang).

Host plants.

Recorded only from Machilus ( Lauraceae ).

Remarks.

Locality labels on the holotype are in Chinese and were translated by You Li. An English locality label has been placed on the specimen below the original locality labels.

Figures

Figure 23. Dorsal, lateral and declivital view of Anisandrus niger, 5.8 - 5.9 mm (A, B, I), A. paragogus holotype, 2.8 mm (C, D, J), A. percristatus, 5.5 mm (E, F, K), and A. sinivali holotype, 3.9 mm (G, H, L).