Anisandrus xuannu, 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 xuannu sp. nov. Fig. 24E, F, I

Type material.

Holotype, female, 四川: 峨眉山 洪椿坪 295 1964-V-12 采集者: 黄复生 [China: Sichuan, Hongchunping, Emeishan Mt., 12.v.1964, Fusheng Huang, ex Fagaceae ] (NMNH). Paratypes, female, China: Chongqing, Simian Shan, 7.v.2016, Tian-Shang, Lv-Jia (RABC, 1); Sichuan, Mt. Emei, 600-1050 m, 5-19.v.1989, L. Bocák (RABC, 1).

Diagnosis.

4.0-4.15 mm long (mean = 4.08 mm; n = 3); 2.0-2.31 × as long as wide. This species is distinguished by the dense mesonotal mycangial tuft that extends laterally from the scutellum to striae 3; declivital posterolateral margin costate to interstriae 5; elytral disc with a deep transverse saddle-like depression, depressed area sulcate; declivital summit with large incurved spine on interstriae 2, interstriae 3 unarmed; declivity moderately sulcate to interstriae 4; declivital strial punctures large, seriate, interstriae minutely biseriately punctate, setose, setae short erect bristle-like; moderate body size; declivity shagreened; elytral disc rugose; body abundantly covered with long erect hair-like setae; and pronotal asperities small, coarse, densely spaced.

Similar species.

Anisandrus auratipilus , A. hera , A. klapperichi , A. percristatus , A. venustus .

Description

(female). 4.0-4.15 mm long (mean = 4.08 mm; n = 3); 2.0-2.31 × as long as wide. Body bicolored with pronotal and elytral bases lighter than rest of body. Pronotal and elytral bases, head, legs, and antennae light brown, remainder of elytra red-brown. Head: epistoma entire, transverse, with a row of hair-like setae. Epistoma entire, transverse, with a row of hair-like setae. Frons weakly convex to upper level of eyes, impunctate, shagreened, weakly rugose, setose; each shallow ruga 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, 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, 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: 0.78 × as long as wide. In dorsal view rounded, type 1, sides convex, rounded anteriorly; anterior margin with a row of six very large serrations. In lateral view type 3, short and tall, disc as long as anterior slope, summit at midpoint. Anterior slope with densely spaced, large coarse asperities, becoming lower and more strongly transverse towards summit. Disc subshiny, median area impunctate, reticulate, lateral areas with dense, small, shallow punctures bearing moderate, erect hair-like setae, some longer hair-like setae at margins. Lateral margins obliquely costate. Base transverse, posterior angles broadly rounded. Mycangial tuft present along basal margin tuft broad, densely setose, laterally extending to elytral striae 3. Elytra: 1.45 × as long as wide, 1.86 × 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 1/2, then broadly rounded to apex. Disc rugose, shiny, with a deep transverse saddle-like depression just behind declivital summit, depressed area sulcate; striae not impressed, with small, shallow punctures separated by two diameters of a puncture, setose, setae as long as a puncture, recumbent, hair-like; interstriae flat, punctate, punctures strongly confused, setose, setae 1 × width of interstriae 2, erect hair-like, unarmed by granules. Declivity occupying approximately 1/2 elytra, evenly rounded, declivital face nearly flat, moderately sulcate to interstriae 4, shagreened; striae not impressed, strial punctures much larger and deeper than those of disc, and bearing setae as described for disc; interstriae minutely biseriately punctate, setose, setae short, erect, bristle-like, interstriae 2 as broad as interstriae 3 at midpoint of declivity, declivital summit with large incurved spine on interstriae 2, interstriae 3 unarmed; lateral margins of declivity densely setose with very long, erect hair-like setae 2-4 × width of interstriae 2. Posterolateral margin costate to interstriae 5. Legs: procoxae contiguous. Protibiae obliquely triangular, broadest at apical 1/3; posterior face smooth; apical 1/2 of outer margin with six large socketed denticles, their length longer than basal width. Meso- and metatibiae flattened; outer margins evenly rounded with at least eight large socketed denticles.

Etymology.

Chinese mythology, Xuannü "mysterious lady"- the goddess of fertility. Noun in apposition.

Distribution.

China (Chongqing, Sichuan).

Host plants.

Recorded from Fagaceae .

Remarks.

The holotype is point mounted with an excessive amount of opaque glue which obscures the examination of ventral characters. 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 24. Dorsal, lateral and declivital view of Anisandrus ursulus, 4.3 - 4.9 mm (A, B, G), A. venustus holotype, 3.1 mm (C, D, H), and A. xuannu holotype, 4.0 - 4.15 mm (E, F, I).