Anisandrus proscissus Smith, Beaver, Pham & Cognato, 2022

Smith, Sarah M., Beaver, Roger A., Pham, Thai Hong & Cognato, Anthony I., 2022, New species and new records of Xyleborini from the Oriental region, Japan and Papua New Guinea (Coleoptera: Curculionidae: Scolytinae), Zootaxa 5209 (1), pp. 1-33 : 3

Anisandrus proscissus Smith, Beaver, Pham & Cognato sp. nov.

( Figs 1–4 )

http://zoobank.org/ urn:lsid:zoobank.org:act:7316C9ED-A5DA-4843-9EC3-354D88F9C5AD

Type material. Holotype, female: VIETNAM, Ninh Binh Province, Cuc Phuong National Park , 390m, 20 ° 21′03″N 105°35′36″E (12-09), SD Gaimari, M Hauser, Pham HT, 24–28.III.2012, ex yellow pan trap ( CDFA) . Paratype, female, as holotype except: MSUC_ARC_314157 (1, MSUC) .

Diagnosis. This species is distinguished by the unique elytral sculpturing in which the striae are deeply impressed on the elytral disc and declivity forming deep strial furrows and interstrial ridges, and elytral disc with a weak transverse saddle-like depression.

Similar species. Anisandrus sinivali Smith, Beaver & Cognato, 2020a , A. eggersi ( Beeson, 1930)

Description (female). 3.55 mm long (mean = 3.55 mm; n = 2); 2.22 × as long as wide. Body black, legs and antennae dark brown. Head: epistoma entire, transverse, with a row of hair-like setae. Frons weakly convex to upper level of eyes, reticulate, moderately punctate; punctures each 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 long and slender, longer than club. Pedicel as wide as scape, shorter than funicle. Funicle 4-segmented, segment 1 shorter than 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 0.94 × as long as wide. In dorsal view rounded, type 1, sides convex, rounded anteriorly; anterior margin with a row of five large serrations. In lateral view short and tall, type 3, 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, impunctate, feebly asperate, basal and lateral areas densely finely punctate, each puncture 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 densely setose, approximately the width of scutellum. Scutellum broad, large, linguiform, flush with elytra, flat, shiny. Elytra: 1.28 × as long as wide, 1.37 × as long as pronotum. Base transverse, edge oblique, humeral angles rounded, parallel-sided in basal 1/2, then broadly rounded to apex; surface shining. Disc with a weak medial transverse saddle-like depression, striae strongly impressed from basal fifth, with large, deep subcontiguous punctures, glabrous; interstriae costate, punctate, punctures uniseriate, setose, setae 2–3 × width of interstriae 2, erect hair-like. Declivity occupying ~2/5 elytra, evenly rounded, declivital face appearing bisulcate, deeply impressed between striae 1 and 2; striae deeply impressed, strial punctures larger and deeper than those of disc; interstriae impunctate, tuberculate and setose along interstriae 1, 3, 4, setae 2–4 × width of interstriae 2, erect, hair-like, interstriae 2 narrower than interstriae 3 at midpoint of declivity, declivital interstriae 1–3 armed with a blunt tubercle at summit, interstriae 3 armed by one or two denticles near declivital summit ventrad to tubercle on interstriae 2. Posterolateral margin costate to interstriae 5, unarmed by granules. Legs: procoxae contiguous. Protibiae obliquely triangular, broadest at apical 1/3; posterior face smooth; apical 1/2 of outer margin with seven or eight very large socketed denticles, their length much longer than basal width. Meso- and metatibiae flattened; outer margins evenly rounded with nine or ten and ten or 11 large socketed denticles, respectively.

Distribution. Vietnam.

Host plants. Unknown.

Etymology. L. proscissus = plowed up. In reference to the deep furrows on elytral declivity. A participle of the verb proscindo.

Figures

FIGURES 1‒8. Lateral, dorsal, posterior oblique and anterior view of Anisandrus proscissus holotype, 3.55 mm (1–4), Anisandrus simplex holotype, 3.25 mm (5–8).