Anisandrus cryphaloides, 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 cryphaloides sp. nov. Fig. 19G, H, L

Type material.

Holotype, female, Vietnam: Cao Bang, 22°36.804'N, 105°51.982'E, 1831 m, 17.iv.2014, VN42, Cognato, Smith, Pham, ex 0.3-3 cm twigs/branches (NMNH). Paratypes, female, as holotype (MSUC, 4; NHMUK, 2; NMNH, 2; VMNH 1); Lao Cai, Hoang Lien N.P., 22.35, 103.77, 1500 m, 17.v.2019, VN152, S.M. Smith, A.I. Cognato, ex 1-3 cm branch (MSUC, 3); as previous except: VN153, ex branch; 1-2 cm (MSUC, 1); as previous except: 1500-2000 m, 20.v.2019, VN185, ex branch; 1-2 cm (MSUC, 1); 1500-2000 m, 20.v.2019, VN186, ex branch; 1-2 cm (MSUC, 1).

Diagnosis.

2.1-2.4 mm long (mean = 2.26 mm; n = 5); 2.2-2.4 × as long as wide. This species is distinguished by the mesonotal mycangial tuft the length of the scutellum; elytral disc convex; declivity gradual and convex, with rounded posterolateral margins; pronotum conical frontally when viewed dorsally (type 0); pronotum armed by four coarse serrations on anterior margin (median pair larger than lateral pair); elytra strongly shagreened or opalescent; and declivital striae weakly impressed.

Similar species.

Anisandrus auco .

Description

(female). 2.1-2.4 mm long (mean = 2.26 mm; n = 5); 2.2-2.4 × as long as wide. Body dark brown. Antennae and legs light brown. Head: epistoma entire, transverse, with a row of hair-like setae. Frons weakly convex to upper level of eyes, alutaceous, subshiny, punctate, punctures large, shallow, setose; punctures bearing a long, erect hair-like seta. Eyes feebly emarginate, almost entire, 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: 0.89 × as long as wide. In dorsal view conical, type 0, sides convex, conical anteriorly; anterior margin with a row of four coarse serrations, median pair larger than lateral pair. In lateral view type 3, short and tall, disc as long as anterior slope, summit at midpoint. Anterior slope with moderately spaced, large coarse asperities, becoming lower and more strongly transverse towards summit. Disc strongly shiny with moderately dense, large, shallow punctures bearing moderate, erect, hair-like setae or short, recumbent, hair-like setae, some longer hair-like setae at margins. Lateral margins obliquely costate. Base transverse, posterior angles acutely rounded. Mycangial tuft present along basal margin, tuft moderately setose, approximately the width of scutellum. Elytra: 1.26 × as long as wide, 1.4 × 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; surface opalescent to shagreened. Disc convex, striae not impressed, with small, shallow punctures separated by less than one diameter of a puncture, setose, setae as long as two punctures, recumbent, hair-like; interstriae flat, punctate, punctures strongly confused, setose, setae longer than the width of interstriae 2, erect hair-like, unarmed by granules. Declivity occupying approximately 1/2 elytra, gradually rounded, declivital face convex; striae weakly impressed, strial punctures somewhat larger and deeper than those of disc; interstriae sparsely uniseriate punctate, setae 2-3 × width of an interstria, erect, hair-like, interstriae 3 narrower than interstriae 2 at midpoint of declivity, interstriae 2 with a small incurved spine at declivital summit. Posterolateral margin rounded, unarmed by granules. Legs: procoxae contiguous; prosternal coxal piece short, inconspicuous. Protibiae obliquely triangular, broadest at apical 1/3; posterior face smooth; apical 1/2 of outer margin with six very large socketed denticles, their length much longer than basal width. Meso- and metatibiae flattened; outer margins evenly rounded with eight very large socketed denticles.

Etymology.

Resembling Cryphalus Erichson, 1836, in reference to the coarse asperities in concentric rows on the anterior half of the pronotum. Noun in apposition.

Distribution.

Vietnam.

Host plants.

Unknown.

Figures

Figure 19. Dorsal, lateral and declivital view of Anisandrus carinensis holotype, 4.5 mm (A, B, I), A. congruens holotype, 2.6 - 2.8 mm (C, D, J), A. cristatus, 3.35 - 3.7 mm (E, F, K), and A. cryphaloides holotype, 2.1 - 2.4 mm (G, H, L).