Microichthyurus niger 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.15594227 |
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persistent identifier |
https://treatment.plazi.org/id/312CE2DE-EEAA-59ED-A3F0-D2818695398E |
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treatment provided by |
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scientific name |
Microichthyurus niger Y. Yang, Liu & X. Yang |
| status |
sp. nov. |
Microichthyurus niger Y. Yang, Liu & X. Yang sp. nov.
Figs 7 C View Figure 7 , 8 C View Figure 8 , 9 C View Figure 9 , 11 A ‒ B View Figure 11 , 12 A ‒ D View Figure 12 , 13 A, B View Figure 13
Etymology.
The specific name is derived from the Latin niger (black), referring to its black body.
Type material.
Holotype. China ‒ Yunnan Prov. • ♂; Jinghong, Menghai, Nabanhe Nature Reserve ; 22.24644°N, 100.60610°E; 1114 m; 26-V-2009; L. Z. Meng leg.; IZAS. GoogleMaps
Paratypes. China ‒ Yunnan Prov. • 2 ♀♀; same data as holotype; IZAS GoogleMaps • 2 ♀♀; Jinghong, Menghai, Nabanhe Nature Reserve ; 22.24644°N, 100.60610°E; 1114 m; 26-IV-2009; L. Z. Meng leg.; IZAS GoogleMaps • 2 ♂♂ 3 ♀♀; Jinghong, Menghai, Nabanhe Nature Reserve ; 22.24644°N, 100.60610°E; 1114 m; 6-V-2009; L. Z. Meng leg.; IZAS GoogleMaps • 2 ♂♂; Jinghong, Menghai, Nabanhe Nature Reserve, Anmaxinzhai ; 22.19577°N, 100.64532°E; 772 m; 16-V-2009; L. Z. Meng leg.; IZAS GoogleMaps .
Diagnosis.
The species resembles M. crassicornis sp. nov. in the general shape of abdominal sternite VIII and aedeagus but can be easily distinguished from the latter by the following characters: abdominal tergite VIII of male as long as wide (Fig. 7 C View Figure 7 ); abdominal sternite VIII of male (Fig. 8 C View Figure 8 ) with lateral portions less slender and about 3.0 times as long as basal width; aedeagus with median lobe moderately sclerotized, one protrusion slender and bent, distinctly longer than the other (Fig. 12 A, D View Figure 12 ). Unlike in M. crassicornis sp. nov., abdominal tergite VIII of male 1.2 times longer than wide (Fig. 7 B View Figure 7 ); abdominal sternite VIII of male (Fig. 8 B View Figure 8 ) with lateral portions is slenderer and about 4.0 times as long as basal width; aedeagus with median lobe strongly sclerotized, both protrusions subequal in length and nearly straight (Fig. 10 E, H View Figure 10 ).
Description.
Body length (both sexes): 5.5‒7.0 mm (5.7 mm in holotype); body width (both sexes): 1.0‒ 1.1 mm (1.1 mm in holotype).
Male (Fig. 11 A View Figure 11 ). Coloration. Body black, only antennae and clypeus brown.
Eyes large, interocular distance about half as wide as diameter of an eye. Antennae cylindrically thickened and extending to posterior margin of abdominal tergite II; antennomeres II about 1 / 3 length of I, III ‒ XI subequal in length and about twice longer than II.
Pronotum 1.1 times wider than length, anterior margin strongly arcuate, posterior margin slightly arcuate, lateral margins parallel, anterior angles nearly rectangular, and posterior angles rounded. Elytra 1.4 times longer than wide, 1.6 times longer than pronotum, with lateral margins subparallel, sutures slightly dehiscent from the base, distance between sutures nearly as wide as width of the elytron, apices rounded.
Abdominal tergite VIII (Fig. 7 C View Figure 7 ) as long as wide, with lateral margins slightly arcuate, postero-lateral projections about · 2 / 5 length of the tergite and straight at inner margins. Abdominal sternite VIII (Fig. 8 C View Figure 8 ) trilobed, with lateral portions converging posteriorly to each other, slender and about 3.0 times as long as basal width, feebly hooked inwards at apex; middle portion feebly longer than wide, feebly widened posteriorly, nearly straight at posterior margin, and rounded at latero-apical angles. Proctiger (Fig. 9 C View Figure 9 ) peach-like, almost surrounded by paraproct and covered with slightly long pubescence on surface. Paraproct (Fig. 9 C View Figure 9 ) semicircular and obviously bordered at lateral margins, slightly emarginate in middle of posterior margin, around which covered with slightly long pubescence (with tergal flange destroyed).
Aedeagus (Fig. 12 A ‒ D View Figure 12 ): left ventral paramere slender and nearly straight in dorsal and ventral views (Fig. 12 A, D View Figure 12 ), obtusely hooked at apex; left dorsal paramere extremely short and lamellar, about half length of left ventral paramere, rounded at apical margin (Fig. 12 A View Figure 12 ); right paramere about 4 / 5 length of left ventral paramere, slender and nearly straight in dorsal and ventral views, sharply hooked at apex (Fig. 12 B, C View Figure 12 ); median lobe as long as parameres, moderately sclerotized, grooved at basal part, stout tube-shaped at apical part, distinctly protruding on one latero-apical portion, slightly protruding on the opposite portion, one protrusion slender and bent, distinctly longer than the other, both sharp at apices (Fig. 12 A, D View Figure 12 ).
Female (Fig. 11 B View Figure 11 ). Similar to males, but body larger, antennae simple and filiform. Abdominal tergite VIII (Fig. 13 A View Figure 13 ) as long as wide, with lateral margins arcuate at base, lateral projections sharper, about 1 / 4 length of the tergite, and slightly sinuate at inner margins. Abdominal sternite VIII (Fig. 13 B View Figure 13 ) about 1.1 times longer than wide, with lateral margins slightly converging posteriorly, posterior margin straight in middle, and latero-apical angles nearly rectangular.
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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