Cyclorhipidion lapilliferum 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 : 11-12

Cyclorhipidion lapilliferum Smith, Beaver, Pham & Cognato sp. nov.

( Figs 33–36 )

http://zoobank.org/ urn:lsid:zoobank.org:act:934B4C11-70DB-40D8-91E6-CC492C8BCC99

Type material. Holotype, female: VIETNAM, Lao Cai Prov., Hoang Lien N.P., 22.35N, 103.77E, 1500–2000m, 21.v.2019, VN198, SM Smith, AI Cognato, ex 2 cm branch, SAX 396 [DNA voucher], MSUC_ARC_314128 ( MSUC).

GenBank. CAD: OP607182 and COI: OP617753 .

Diagnosis. This species is distinguished by the moderate size; declivity obliquely truncate, strongly shagreened and dull; pronotum longer than wide, subquadrate from dorsal view (type 3); and declivital interstrial punctures replaced by confused tubercles.

Cyclorhipidion lapilliferum is very similar to C. circumcisum ( Sampson, 1921) from which it can be distinguished by the smaller size (3.4 mm vs 4.0 mm) and more elongate form (3.09 × vs 2.67 × as long as wide).

Similar species. C. circumcisum , C. muticum Smith, Beaver & Cognato, 2020a

Description (female). 3.4 mm long (n = 1); 3.09 × as long as wide. Body, legs and antennae ferruginous. Head: epistoma entire, transverse, with a row of hair-like setae. Frons weakly convex to upper level of eyes; surface shagreened, impunctate, alutaceous, moderately rugose. Eyes deeply emarginate just above antennal insertion, upper part smaller than lower part. Antennal scape regularly thick, as long as club. Pedicel as wide as scape, shorter than funicle. Funicle 4-segmented, segment 1 shorter than pedicel. Club approximately circular and flat, type 3; segment 1 corneous, transverse on anterior face, occupying basal ~1/3; segment 2 narrow, corneous; segments 1‒3 present on posterior face. Pronotum 1.18 × as long as wide. In dorsal view subquadrate, sides convex, type 3, narrowly rounded anteriorly; anterior margin without serrations. In lateral view elongate with disc much longer than anterior slope, type 7, disc flat, summit at apical 1/3. Anterior slope shagreened, with densely spaced, fine, narrow asperities, becoming lower and more strongly transverse towards summit, bearing long, fine, semi-recumbent, hair-like setae. Disc shagreened, alutaceous, densely, finely punctate, setose, setae dense, long, fine hair-like. Lateral margins obliquely costate. Base transverse, posterior angles narrowly rounded. Scutellum large, broad, linguiform, shiny, flush with elytra, flat. Elytra: 1.91 × as long as wide, 1.62 × as long as pronotum. Base transverse, edge oblique, humeral angles rounded, parallel-sided in basal ~4/5, then sharply angulate to apex. Disc ascending posteriorly, shiny, basal 1/4 shagreened, impunctate; striae and interstriae not impressed, sparsely setose, setae short erect, hairlike, striae seriate, punctures small, shallow; interstrial punctures confused, minute, punctures strongly confused, separated by 3‒5 diameters of a puncture. Declivity occupying 1/3 of elytra, obliquely truncate, face weakly convex, strongly shagreened, dull, densely setose; six striae present, striae weakly impressed, punctures difficult to discern, minute, shallow, shagreened, slightly larger than on disc, striae 2 equidistant between 1 and 3; interstriae weakly convex, interstriae lightly setose, setae long, very fine, erect hair-like; interstriae impunctate, densely covered by confused tubercules, tubercles numerous, small to minute. Posterolateral margin costate, tuberculate, extending laterally to interstriae 7, setose, setae long, fine, erect, hair-like. Legs: procoxae contiguous. Protibiae semi-circular with evenly rounded outer edge, broadest at apical 1/3; posterior face smooth; apical 1/3 of outer margin with nine moderate socketed denticles, their length approximately as long as basal width. Meso- and metatibiae broad, flattened; outer margin evenly rounded with 12 and 14 moderate socketed denticles, respectively.

Distribution. Vietnam.

Host plants. Unknown.

Etymology. L. lapilliferum = having pebbles. In reference to the granules on the elytral declivity. A variable adjective.

Figures

FIGURES 21‒36. Lateral, dorsal, posterior oblique and anterior view of Cyclorhipidion achlys holotype, 3.4 mm (21–24), Cyclorhipidion conidentatus holotype, 3.1 mm (25–28), Cyclorhipidion gladigerum holotype, 2.6 mm (29–32), Cyclorhipidion lapilliferum holotype, 3.4 mm (33–36).