Microichthyurus robusticeps Pic, 1923

Lin, Hanqing, Liu, Haoyu, Yang, Xingke & Yang, Yuxia, 2025, Taxonomy of the genus Microichthyurus Pic (Coleoptera, Cantharidae, Chauliognathinae), with descriptions of nine new species from China, Deutsche Entomologische Zeitschrift 72 (1), pp. 27-56 : 27-56

publication ID

https://doi.org/10.3897/dez.72.145885

publication LSID

lsid:zoobank.org:pub:CF9D23E3-A992-4179-8BEE-83F159D358EF

DOI

https://doi.org/10.5281/zenodo.15594211

persistent identifier

https://treatment.plazi.org/id/DE9C8F8F-1771-5BA9-A9A9-53BAC619647C

treatment provided by

Deutsche Entomologische Zeitschrift by Pensoft

scientific name

Microichthyurus robusticeps Pic, 1923
status

 

Microichthyurus robusticeps Pic, 1923

Figs 1 A, B View Figure 1 , 2 A, B View Figure 2 , 3 A View Figure 3 , 4 A ‒ D View Figure 4 , 5 A, B View Figure 5

Microichthyurus robusticeps Pic, 1923: 57.

Material examined.

Vietnam • 1 ♂ 1 ♀; Tonkin; Hoa-Binh ; A de Cooman leg.; IZAS . LAOS • 1 ♂ 3 ♀♀; Vang Viene ; 27-VI-2015; Haoyu Liu leg.; MHBU 2 ♂♂ 2 ♀♀; Phon Khao Khouay National Bio-Diversity ; 160 m; 29-VI-2015; Haoyu Liu leg.; MHBU .

Re-description.

Body length (both sexes): 3.5‒3.8 mm; body width (both sexes): 0.8‒0.9 mm.

Male (Fig. 1 A View Figure 1 ). Coloration. Body black, head and pronotum with blue metallic luster; antennomeres I ‒ III yellow; elytra gray at apical 1 / 3 parts; legs gray at coxae and trochanters; abdomen light yellow at anterior and posterior margins of ventrites II ‒ VI.

Eyes strongly large, interocular distance about half as wide as diameter of an eye, head width across eyes distinctly wider than anterior margin of pronotum. Antennae extending to posterior margin of abdominal tergite IV, antennomeres II ‒ III, V, and VII subequal in length and about half length of I, III ‒ IV, and VIII ‒ X cylindrically thickened, IV about 0.8 times as long as III, VI about 1.2 times as long as V, VIII ‒ X progressively shortened, XI fusiform and about twice longer than X.

Pronotum 1.2 times wider than long, anterior margin slightly arcuate, posterior margin strongly bisinuate, lateral margins slightly converging posteriorly, anterior angles rounded, and posterior angles nearly rectangular. Elytra as long as wide, 1.5 times longer than pronotum, with lateral margins subparallel, sutures strongly dehiscent from the base, distance between sutures nearly as wide as width of the elytron, apices rounded.

Abdominal tergite VIII (Fig. 2 A View Figure 2 ) about 1.1 times longer than wide, with lateral margins nearly straight, postero-lateral projections about 1 / 3 length of the tergite and nearly straight at inner margins. Abdominal sternite VIII (Fig. 2 B View Figure 2 ) bilobed, with lateral portions converging posteriorly to each other, sickle-shaped and acute at apices, slender and 4.0 times as long as basal width, bisinuately emarginate at basal parts of inner margin, where covered with a few erected and stout setae. Proctiger (Fig. 3 A View Figure 3 ) peach-like, completely surrounded by paraproct, covered with some slightly long setae on surface. Paraproct (Fig. 3 A View Figure 3 ) well-developed, narrowed posteriorly, and shallowly emarginate at posterior margin, covered with a few long setae, with tergal flange extremely long, almost 4.0 times as long as paraproct, slightly wider at base, and bent inwards.

Aedeagus (Fig. 4 A ‒ D View Figure 4 ): left ventral paramere rod-like, straight and slender, slightly swollen at apex (Fig. 4 A, B View Figure 4 ); left dorsal paramere about 1.3 times as long as left ventral paramere, very slender and spiral, acute at apex (Fig. 4 C View Figure 4 ); right paramere short and lamellar, about 2 / 5 length of left ventral paramere, widely rounded at apical margin (Fig. 4 C View Figure 4 ); median lobe moderately sclerotized, grooved at basal part and conical tube-shaped at apical half, rounded at apex, about half length of parameres (Fig. 4 A, B View Figure 4 ); internal sac elongate tube-shaped, on which surface densely covered with numerous short setae.

Female (Fig. 1 B View Figure 1 ). Similar to males, but antennae simple and filiform. Abdominal tergite VIII (Fig. 5 A View Figure 5 ) about 1.2 times longer than wide, with lateral margins arcuate, lateral projections about 1 / 4 length of the tergite and slightly arcuate at inner margins. Abdominal sternite VIII (Fig. 5 B View Figure 5 ) about 1.1 times longer than wide, with lateral margins moderately converging posteriorly, posterior margin nearly straight, and latero-apical angles rounded.

Distribution.

Laos, Vietnam.

Remarks.

Although the type of this species was not located in Muséum national d’histoire naturelle, Paris, France ( MNHN), it could be easily recognized by its characteristic large head and bicolored elytra ( Pic 1923). It is recorded in Laos for the first time.

IZAS

Institut Zoologii Akademii Nauk Ukraini - Institute of Zoology of the Academy of Sciences of Ukraine

MNHN

Museum National d'Histoire Naturelle

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

SuperFamily

Elateroidea

Family

Cantharidae

SubFamily

Chauliognathinae

Tribe

Ichthyurini

Genus

Microichthyurus

Loc

Microichthyurus robusticeps Pic, 1923

Lin, Hanqing, Liu, Haoyu, Yang, Xingke & Yang, Yuxia 2025
2025
Loc

Microichthyurus robusticeps

Pic M 1923: 57
1923