Macrotomoderus usitatus, 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 : 73-76

Macrotomoderus usitatus sp. nov.

urn:lsid:zoobank.org:act:A5F0A7F7-2B29-42C7-83C4-D4893D0E0BF6

Figs 42–43

Differential diagnosis

See diagnosis of Macrotomoderus korolevi sp. nov. above and key to species below.

Etymology

Named from the Latin ‘usitatus’ (‘common, ordinary’) since this species does not display any peculiar external features.

Type material

Holotype CHINA • ♂; “CHINA, Yunnan, SSE Shuangjiang Town , 23°22′22″N 99°44′47″E, 2540 m, 22.vi.2011 Belousov, Kabak & Korolev leg.”; ZIN.

Paratypes (9 specimens) CHINA • 4 specimens; same label as for holotype; ZIN • 5 specimens; same label as for holotype; DTC .

Description

MEASUREMENTS. Holotype, total body length 4.1 mm; head 0.95 mm long, across eyes 0.9 mm broad, pronotum 1 mm long, maximum width 0.8 mm, minimum width 0.35 mm, elytra 2.15 mm long, 1.7 mm combined wide. Selected paratypes are 4.05 mm (♂), 4.2 mm (♀), 4.35 mm (♀), and 4.45 mm (♀) long.

Dorsum and venter uniformly reddish-brown. Mouthparts, antennae, palps and legs yellowish-brown. Head ovoid with small, ovoid compound eyes, which are not protruding beyond head outline laterally. Tempora rounded in broad arc, head base medially subtruncate. Head dorsal punctures minute and inconspicuous. Head dorsal setae inconspicuous, sparse.Antennae long, extending towards base of elytra. Antennomere three about 1.4–1.5 × as long as antennomere two, antennomeres 6–10 transverse, of them 8–10 strongly transverse. Terminal antennomere triangular with obtusely angulate apex, 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 broadly rounded, dorsally without anterior rim ( Fig. 42B ). Anterior and posterior lobe slightly convex in lateral view ( Fig. 42C ). Lateral constriction continues onto disc in lateral view, shallow ( Fig. 42C ). 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 strongly obtuse (in lateral view), broadly separated denticles (in lateral view). Cavity in lateral wall of pronotum between lateral denticles small, elliptical. In dorsal view, lateral pronotal fovea broad, anterior and posterior pair of denticles appear obtusely angulate, glabrous ( Fig. 42B ). Pronotal punctures minute on disc; lateral constriction dorsally with some dense, irregularly shaped, moderately large punctures and conspicuous, large, strongly elongate, median longitudinal notch ( Fig. 42B ) (interrupted by transverse rugules in some paratypes). Intervening spaces on lateral constriction between some close-aligned punctures may appear carinate. Dorsal pronotal setae inconspicuous, moderately long. Scutellar shield minute, rounded apically. Elytra dorsally elongate elliptical, flattened in lateral view, widened laterally around midlength, lateral margins 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 on anterior half of elytra about as large to twice as large as punctures. Elytral setae long and moderately dense, suberect. Male tergite and morphological sternite VII broadly rounded at posterior margin. Aedeagus as in Fig. 43 , large and robust, strongly constricted towards narrower apex, with delicate, poorly visible, irregularly shaped and positioned gonopore armature with foam-like constituting pieces at least in apical portion of armature.

Sexual dimorphism

Female externally similar to male.

Ecology

Collected at 2540 m elevation.

Distribution

Known only from southern part of Yunnan Province, SW China.

Figures

Fig. 42. Macrotomoderus usitatus 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. 43. Macrotomoderus usitatus sp. nov., holotype, ♂ (ZIN), aedeagus. A–B. General view, different positions. C. Gonopore armature, median portion of apicale.D. Ditto, basal portion of apicale.E. Median portion of basale. F. Median portion of apicale, different position. G. Apical portion. Not to scale.