Macrotomoderus hajeki, 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 : 29-32

Macrotomoderus hajeki sp. nov.

urn:lsid:zoobank.org:act:9445FADE-9561-412D-B434-DA1D0699ACC4

Figs 16–17

Differential diagnosis

See key to species below.

Etymology

Patronymic. Named in honour of one of the first collectors and my good colleague, Jiří Hájek (NMP).

Type material

Holotype CHINA • ♂; “CHINA, Guangdong prov (MF 16) W of Qixing, 1-3.v.2011 Heishiding nature reserve 23°27.9′N, 111°54.3′E 190-260m, Fikáček & Hájek // sifting of moist leaf litter in the dried-up streambeds and along the streams in the primary lowland forest ”; NMP.

Paratypes (3 specimens) CHINA • 2 ♀♀; same labels as for holotype; NMP • 1 ♀; same labels as for holotype; DTC .

Description

MEASUREMENTS. Holotype, total body length 3.55 mm; head 0.7 mm long, across eyes 0.8 mm broad, pronotum 0.85 mm long, maximum width 0.7 mm, minimum width 0.3 mm, elytra 2 mm long, 1.5 mm combined wide. Selected female paratypes are 3.5 mm and 3.6 mm long.

Dorsum and venter uniformly brown, pronotum contrastingly paler. Mouthparts, antennae, palps and legs yellow. Head broadly ovoid with moderately large, ovoid compound eyes, which are slightly protruding beyond head outline laterally. Head rounded in very broad arc posterior to eyes. Head dorsal punctures minute and inconspicuous. Head dorsal setae inconspicuous, sparse. Antennae extending towards base of pronotum. Antennomere three slightly longer than antennomere two, antennomeres 8–10 transverse, of them 9–10 strongly transverse. Terminal antennomere asymmetrically triangular with pointed apex, 2–2.2× as long as penultimate antennomere. Terminal maxillary palpomere securiform. Pronotum with broad and medially deeply notched postmedian lateral constriction. Front margin of anterior lobe broadly rounded, dorsally without anterior rim ( Fig. 16B ). Anterior lobe very slightly convex, near flattened in lateral view ( Fig. 16C ). Lateral constriction slightly continues onto disc in lateral view, very shallow ( Fig. 16C ). Lateral pronotal fovea moderately broad and deep at lower external margin of pronotum, widens upwards towards pronotal disc in lateral view, external margins protruding into obtuse (in lateral view), moderately widely separated denticles (in lateral view). Cavity in lateral wall of pronotum between lateral denticles small, elliptical. In dorsal view, lateral pronotal fovea moderately broad, anterior and posterior pair of denticles appear obtusely angulate, anterior pair glabrous, posterior dorsally with a brush of dense, short setae ( Fig. 16B ). Pronotal punctures minute on disc; lateral constriction dorsally with dense, irregularly shaped punctures. Dorsal pronotal setae inconspicuous, moderately long. Scutellar shield small, apically rounded. Elytra dorsally elliptical, flattened in lateral view, widened laterally around midlength, shoulders obsolete (apterous species). Elytral punctures moderately large, dense, becoming smaller and sparser towards apices. Elytral setae long and sparse, suberect. Male tergite and morphological sternite VII broadly rounded at posterior margin. Aedeagus as in Fig. 17 , rather large and robust, with large, balloon-like basale and large, irregularly-shaped, apically tapered, gonopore armature.

Sexual dimorphism

Not indicated.

Ecology

Collected from leaf litter in the streambeds in the primary lowland forest at 190–260 m elevation.

Distribution

Known only from Heishiding nature reserve, Guangdong Province, SE China.

Figures

Fig. 16. Macrotomoderus hajeki sp. nov., holotype, ♂ (NMP). A. Habitus, dorsal view. B. Forebody, dorsal view. C. Ditto, lateral view. Scale bar: A = 1 mm; B–C = not to scale.

Fig. 17. Macrotomoderus hajeki sp. nov., holotype, ♂ (NMP), aedeagus. A–B. General view, different positions. C. Gonopore armature in median portion of aedeagus. D. Ditto, apical portion of basale. Not to scale.