Microichthyurus crassicornis Y. Yang, Liu & X. Yang, 2025
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publication ID |
https://doi.org/10.3897/dez.72.145885 |
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publication LSID |
lsid:zoobank.org:pub:CF9D23E3-A992-4179-8BEE-83F159D358EF |
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DOI |
https://doi.org/10.5281/zenodo.15594225 |
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persistent identifier |
https://treatment.plazi.org/id/2D2BB1BC-180A-5DB0-94D2-ACB95EAB6E9B |
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treatment provided by |
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scientific name |
Microichthyurus crassicornis Y. Yang, Liu & X. Yang |
| status |
sp. nov. |
Microichthyurus crassicornis Y. Yang, Liu & X. Yang sp. nov.
Figs 6 B View Figure 6 , 7 B View Figure 7 , 8 B View Figure 8 , 9 B View Figure 9 , 10 E ‒ H View Figure 10
Etymology.
The specific name is derived from the Latin crassus (thick) and cornus (horn), referring to its antennae broaden.
Type material.
Holotype. China ‒ Yunnan Prov. • ♂; Xishuangbanna, Tropical Botanical Garden ; 659‒819 m; 31-V-2015; Z. Z. Huang leg.; IZAS.
Paratypes. China ‒ Yunnan Prov. • 1 ♂; Lancang, Huimin, Jingmai ; 22.59278°N, 100.02623°E; 1488 m; 11-VII-2017; netting; J. F. Liang & C. C. Yu leg.; MHBU GoogleMaps • 1 ♂; Lancang, Jiujinghanizu, Shuifang ; 22.59278°N, 100.05669°E; 1546 m; 6-VII-2017; netting; X. M. Wang leg.; MHBU GoogleMaps .
Diagnosis.
The species resembles M. quadratus sp. nov. in the shape of abdominal sternite VIII but can be easily distinguished from the latter by the following characters: abdominal sternite VIII of male (Fig. 8 B View Figure 8 ) with lateral portions converging posteriorly to each other, middle portion subparallel-sided and as long as wide; aedeagus with median lobe (Fig. 10 E, H View Figure 10 ) strongly sclerotized, pocket-shaped at apical part, strongly protruding at latero-apical portions. Unlike in M. quadratus sp. nov., abdominal sternite VIII of male (Fig. 8 A View Figure 8 ) with lateral portions diverging posteriorly from each other, middle portion slightly narrowed posteriorly and 1.5 times as long as wide; aedeagus with median lobe (Fig. 10 D View Figure 10 ) slightly sclerotized, stout tube-shaped at apical half, rounded at apex.
Description.
Body length: 4.0‒ 4.1 mm (4.0 mm in holotype); body width: 0.9 mm (0.9 mm in holotype).
Male (Fig. 6 B View Figure 6 ). Coloration. Body black, but yellow at antennomeres I ‒ VI, clypeus, pro- and meta-coxae and trochanters, meso-coxae, trochanters, and basal half parts of femora.
Eyes large, interocular distance about 0.6 times as wide as diameter of an eye. Antennae cylindrically thickened and extending posterior margin of abdominal tergite II; antennomeres II ‒ III subequal and about 1 / 3 length of I, IV ‒ XI subequal in length and about twice longer than III.
Pronotum 1.1 times wider than long, anterior margin slightly arcuate and posterior margin nearly straight, lateral margins parallel, anterior angles rounded, and posterior angles rectangular. Elytra 1.3 times longer than wide, 1.8 times longer than pronotum, with lateral margins subparallel, sutures dehiscent from the base, distance between sutures nearly as wide as width of the elytron, apices rounded.
Abdominal tergite VIII (Fig. 7 B View Figure 7 ) about 1.2 times longer than wide, with lateral margins slightly arcuate, postero-lateral projections about · 2 / 5 length of the tergite and nearly straight at inner margins. Abdominal sternite VIII (Fig. 8 B View Figure 8 ) trilobed, with lateral portions converging posteriorly to each other, very slender and about 4.0 times as long as basal width, hardly hooked at apex; middle portion nearly parallel-sided, as long as wide, slightly arcuate at posterior margin and rounded at latero-apical angles. Proctiger (Fig. 9 B View Figure 9 ) semioval, almost surrounded by paraproct and densely covered with long pubescence on surface. Paraproct (Fig. 9 B View Figure 9 ) semicircular and obviously bordered at lateral margins, slightly emarginate in middle of posterior margin, around which covered with long pubescence, with tergal flange long and about 3.0 times as long as paraproct, basal half part strongly broadened and 1.2 times longer than wide, acute at apical outer angles, bisinuate at outer margin and nearly straight at inner margin, present with an oblong bubble-shaped convex on surface, apical half part slender and bent inwards.
Aedeagus (Fig. 10 E ‒ H View Figure 10 ): left ventral paramere slender and feebly bisinuate in dorsal and ventral views (Fig. 10 E, H View Figure 10 ), sharply hooked at apex (Fig. 10 E View Figure 10 ); left dorsal paramere extremely short and lamellar, about 2 / 5 length of left ventral paramere, rounded at apical margin (Fig. 10 E View Figure 10 ); right paramere nearly as long as left ventral paramere, slender and nearly straight in dorsal and ventral views, sharply hooked at apex (Fig. 10 E, H View Figure 10 ); median lobe as long as parameres, strongly sclerotized, grooved at basal part, pocket-shaped at apical part, distinctly protruding at latero-apical portions, both protrusions very slender and nearly straight, subequal in length and acute at apices (Fig. 10 E, H View Figure 10 ).
Female. Unknown.
Distribution.
China (Yunnan).
| IZAS |
Institut Zoologii Akademii Nauk Ukraini - Institute of Zoology of the Academy of Sciences of Ukraine |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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SuperFamily |
Elateroidea |
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SubFamily |
Chauliognathinae |
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Tribe |
Ichthyurini |
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