Clytellus konstantinovi Miroshnikov, 2020

Miroshnikov, A. I., 2020, Taxonomic notes on the tribes Tillomorphini Lacordaire, 1868 and Clytellini Miroshnikov, 2014, stat. n., with descriptions of new taxa and a third addition to review of the genus Clytellus Westwood, 1853 (Coleoptera: Cerambycidae: Cerambycinae), Russian Entomological Journal 29 (4), pp. 388-399 : 395-396

Clytellus konstantinovi Miroshnikov , sp.n.

Figs 15–18 .

MATERIAL. Holotype ♀ ( NHMD) ( Fig. 15 ), E Malaysia, Sarawak, Kuching dist. , Serapi Mt., 27– 29.03.1994 (leg. Sv. Bílý), “ Clytellus westwoodii Pascoe ”, “ Clytellus monilis Holzschuh, Ole Mehl det. 2012”.

DIAGNOSIS. This new species seems to be especially similar to C. viridipennis Hayashi, 1977 , but differs clearly at least by the presence of a distinct constriction in the apical third of the pronotum, as in Figs 15–16 (in C. viridipennis , pronotum in the apical third without any constriction), the microsculpture developed across entire width in the basal third of the elytra, as in Fig. 17 (in C. viridipennis , microsculpture between coarse and very coarse punctures on the basal third of each elytron is located in the inner half only). Clytellus konstantinovi sp.n. can also be compared to as a yet undescribed species similar to C. viridipennis [see Miroshnikov, 2014: 160], but is distinguished through the presence of dense, recumbent, white setae at the apex of the elytra, as in Fig. 15 , as well as, like from C. viridipennis , by the the presence of a distinct constriction in the apical third of the pronotum, as in Figs 15–16 .

DESCRIPTION. Female. Body length 6.1 mm, humeral width 1.5 mm. Black; antennae, partly legs dark reddishbrown; tarsi, visible abdomen sternites, mostly, reddishbrown; elytra reddish at apex; dorsum almost entirely shiny; elytra with a distinct, metallic, greenish lustre.

Head with a flat frons; antennomere 2, 1.4 times as long as isthmus between antennal cavities; antennae slightly not reaching apical third of elytra; length ratio of antennomeres 1–11, 38: 20: 28: 32: 35: 33: 29: 25: 24: 24: 42; antennomere 2, 1.65 times as long as wide.

Pronotum 1.74 times as long as wide at apex, 2.18 times as long as width at base; apex 1.25 times as broad as base, the very base 1.32 times as broad as constriction in front of base; strongly convex; with a distinct constriction in apical third; area of constriction in front of base with coarse, longitudinal grooves very sharp both on sides and dorsally; longitudinal groove at bottom of this constriction sharply expressed; remaining surface almost smooth, only with sparse, small, mostly clear punctures.

Elytra 2.31 times as long as wide at humeral width, in apical half 1.03 times as broad as humeral width; a strong depression before middle, a moderately convex surface behind; basal part with coarse to very coarse, mostly oblongoval, heterogeneous punctures, thereby many of them located in area of a contrasting, wide, velvety, dull, microsculpture fascia covering entire width of elytra (like in some other Clytellus species, e.g. C. olesteroides Pascoe, 1885 or C. gressitti Miroshnikov, 2014 ); on sides with a longitudinal, long, sharply expressed groove formed by coarse, oblongoval, very dense punctures; apical part with small punctures forming on each elytron more or less clear, longitudinal, long rows.

Prosternum with an obliterated sculpture; its profile barely curved in apical part ( Fig. 18 ); prosternal process at apex about as wide as between procoxae; mesosternal process between mesocoxae barely narrower than prosternal process between procoxae; metepisterna with a very distinct denticle at apex; first (visible) abdominal sternite 1.43 times as long as all following (visible) sternites combined.

Last tarsomere with two claws not fused at base.

Setation mainly as follows: base of pronotum in the form of a well-developed fascia ( Figs 15–16 ), apex of elytra ( Fig. 15 ), partly prosternum, most of mesosternum, almost complete metasternum and first (visible) abdominal sternite, as well as partly legs clothed with more or less dense, recumbent, white setae, partly with a silver tint; head, antennae, partly pronotum, as well as venter and legs covered by similar, but sparser setae; head, partly antennae, pronotum on sides at apex, elytra, venter and, partly, legs with more or less long, sparse, on elytra mainly more robust, erect or suberect, light setae, thereby on elytra being mostly yellowish.

ETYMOLOGY. I am pleased to dedicate this new species to my friend and colleague, Dr. Alexander S. Konstantinov (National Museum of Natural History, Smithsonian Institution, Washington D.C., USA), who constantly provides his great help to my research.

Figures

Figs 15–18. Clytellus konstantinovi sp.n., holotype, female: 15 — habitus, dorsal view; 16 — pronotum; 17 — base of elytra; 18 — habitus, lateral view. Рис. 15–18. Clytellus konstantinovi sp.n., голотип, самка: 15 — общий вид, сверху; 16 — переднеспинка; 17 — основание надкрылий; 18 — общий вид, сбоку.