Macrotomoderus korolevi, Telnov, 2022

Telnov, Dmitry, 2022, Revision of the Tomoderinae (Coleoptera: Anthicidae). Part III. New species and records of Macrotomoderus Pic, 1901 from China and a key to the Palaearctic species, European Journal of Taxonomy 797, pp. 1-100 : 45-49

Macrotomoderus korolevi sp. nov.

urn:lsid:zoobank.org:act:DA8234A8-A2A7-4A17-89CA-687732FD6668

Figs 26–27

Differential diagnosis

Most similar to Macrotomoderus usitatus sp. nov. (described below). Differs primarily in the shape of the male aedeagus, the evenly rounded head base (the head base is medially subtruncate in M. usitatus sp. nov.), the dorsally comparatively denser and rougher punctured area on the lateral constriction (punctures on the area generally smaller and less rough in M. usitatus sp. nov.), and the absence of the large, strongly ovoid, median longitudinal notch on the lateral constriction (present in M. usitatus sp. nov.). Also see key to species below.

Etymology

Patronymic. Named in honour of one of the first collectors, Alexander Korolev (Russian Federal Research Institute of Fisheries and Oceanography, St Petersburg branch, St Petersburg, Russia).

Type material

Holotype CHINA • ♂: “CHINA, Yunnan, W Yunxian Town, 25°28′29″N 99°58′23″E 2965 m, 17.vi.2011 Belousov, Kabak, Korolev leg.”; ZIN.

Description

MEASUREMENTS. Holotype, total body length 4.2 mm; head 0.95 mm long, across eyes 0.9 mm broad, pronotum 1 mm long, maximum width 0.85 mm, minimum width 0.4 mm, elytra 2.55 mm long, 1.75 mm combined wide.

Dorsum and venter uniformly brown, pronotum paler reddish-brown. Mouthparts, antennae, palps and legs yellowish-brown. Head ovoid with small, ovoid compound eyes, which are not protruding beyond head outline laterally. Head rounded in broad arc posterior to eyes. Head dorsal punctures minute and inconspicuous. Head dorsal setae inconspicuous, sparse. Antennae extending slightly over base of pronotum. Antennomere three about 1.1–1.2× as long as antennomere two, antennomeres 8–10 transverse, of them 9–10 strongly transverse. Terminal antennomere triangular with pointed apex, about 1.6–1.7 × as long as penultimate antennomere. Terminal maxillary palpomere securiform. Pronotum with broad and medially deeply notched postmedian lateral constriction. Front margin of anterior lobe subtruncate, dorsally without anterior rim ( Fig. 26B ). Anterior lobe slightly convex in lateral view ( Fig. 26C ). Lateral constriction continues onto disc in lateral view, shallow ( Fig. 26C ). Lateral pronotal fovea broad at lower external margin of pronotum, slightly widens upwards towards pronotal disc in lateral view, external margins protruding into a pair of obtuse (in lateral view), dorsally glabrous, moderately widely separated denticles (in lateral view). Cavity in lateral wall of pronotum between lateral denticles moderately large, elliptical. In dorsal view, lateral pronotal fovea broad, anterior and posterior pair of denticles appear obtusely angulate, glabrous ( Fig. 26B ). Pronotal punctures minute on disc; lateral constriction dorsally with dense and coarse, variably sized punctures. Dorsal pronotal setae inconspicuous, moderately long. Scutellar shield minute, triangular. Elytra dorsally elliptical, slightly convex in lateral view, strongly widened laterally around midlength, lateral margins evenly broadly rounded, shoulders obsolete (apterous species). Elytral punctures much stronger and larger than those on dorsal forebody, becoming less prominent on posterior third of elytra. Intervening spaces about 2–3× as large as punctures on basal half of elytra. Elytral setae long and sparse, suberect. Male tergite and morphological sternite VII broadly rounded at posterior margin. Aedeagus as in Fig. 27 , large and broad, with balloon-like basale and peculiar, ‘garland’-arranged gonopore armature. Basal portion of armature consists of large, pebble-shaped constituting pieces while in apical portion these large, elliptical pieces intermixed with dense, elongate, irregularly shaped, spine-like pieces. Near apex of aedeagus armature constituting pieces becoming smaller, generally less elongate (with exceptions).

Sexual dimorphism

Female is unknown.

Ecology

Collected at 2965 m elevation.

Distribution

Known only from east of Erhai Lake, central part of Yunnan Province, SW China.

Figures

Fig. 26. Macrotomoderus korolevi sp. nov., holotype, ♂ (ZIN). A. Habitus, dorsal view. B. Forebody, dorsal view. C. Ditto, lateral view. Scale bar: A = 1 mm; B–C = not to scale.

Fig. 27. Macrotomoderus korolevi sp. nov., holotype, ♂ (ZIN), aedeagus. A–B. General view, different positions. C. Gonopore armature, median portion of aedeagus.D. Ditto, basal portion of apicale, stronger magnification. E. Apical portion. Not to scale.