Macrotomoderus muli Telnov 2022, sp. nov.

Macrotomoderus muli sp. nov.

urn:lsid:zoobank.org:act: 87629CA2-F57D-48D4-BADB-F46123D350EB

Figs 30–31

Differential diagnosis

See key to species below.

Etymology

Named after Muli Tibetan Autonomous County in Sichuan, where this species was first collected. Noun in apposition.

Type material

Holotype CHINA • ♂; “CHINA, Sichuan, S of Muli, 3975-4120 m, 22.v.2012 Belousov, Davidian, Kabak & Korolev leg. // 27°43′16″N 101°15′13″E 27°43′03″N 101°15′05″E”; ZIN.

Paratype ( 1 specimen) CHINA • 1 ♀; same labels as for holotype; DTC.

Description

MEASUREMENTS. Holotype, total body length 3.93 mm; head 0.83 mm long, across eyes 0.8 mm broad, pronotum 1 mm long, maximum width 0.7 mm, minimum width 0.45 mm, elytra 2.1 mm long, 1.4 mm combined wide. Female paratype is 4.25 mm long.

Dorsum and venter uniformly brown. Mouthparts, antennae, palps and legs paler brown. Head ovoid with small, ovoid compound eyes, which are not or slightly protruding beyond head outline laterally. Tempora twice or more as long as dorsal eye length, slightly constricted posteriad. Head base broadly rounded. Head dorsal punctures minute and inconspicuous. Head dorsal setae moderately dense.Antennae extending towards base of pronotum. Antennomere three about 1.1.–1.2 × as long as antennomere two, antennomeres 4–5 shortened, ovoid, antennomeres 7–10 transverse, of them 9–10 strongly transverse. Terminal antennomere broadly triangular with obtuse angulate apex, about 1.6–1.7× as long as penultimate antennomere. Terminal maxillary palpomere slightly securiform, nearly triangular. Pronotum with broad and medially moderately deeply notched postmedian lateral constriction. Front margin of anterior lobe very broadly rounded, dorsally without anterior rim (Fig. 30B). Anterior lobe barely convex in lateral view (Fig. 30C). Lateral constriction barely continues onto disc in lateral view, very shallow (Fig. 30C). Lateral pronotal fovea moderately broad at lower external margin of pronotum, widens upwards towards pronotal disc in lateral view, external margins protruding into a pair of obtuse (in lateral view), rather narrowly separated denticles (in lateral view). Cavity in lateral wall of pronotum between lateral denticles not observed since the area laterally concealed by dense, golden setae. In dorsal view, lateral pronotal fovea broad, anterior and posterior pair of denticles appear obtusely angulate, glabrous, dorsally and ventrally concealed with long, rather dense setae from adjoining portions of lateral constriction (Fig. 30B). Pronotal punctures minute on disc; lateral constriction dorsally with gentle, short median longitudinal carina and dense, moderately large, irregularly shaped punctures. Dorsal pronotal setae moderately dense. Scutellar shield minute, triangular. Elytra dorsally elongate, flattened in lateral view, slightly widened laterally prior to middle, shoulders obsolete (apterous species). Elytral punctures ovoid, shallow, rather dense, becoming smaller or sparser towards apices. Intervening spaces on anterior half of elytra about same wide as punctures. Elytral setae long and sparse, suberect. Male tergite and morphological sternite VII broadly rounded at posterior margin.Aedeagus as in Fig. 31, large and robust, with elliptical basale. Apicale filled with very dense, irregularly shaped and positioned, in part spinose gonopore armature. Constituting pieces of armature in basale distinctly elliptical, not spinose compared to those in apical portion of gonopore armature.

Sexual dimorphism

Not indicated externally.

Ecology

Collected at 3975–4120 m elevation.

Distribution

Known only from Muli Tibetan Autonomous County, southern part of Sichuan Province, central China.