Microichthyurus guangxiensis Y. Yang, Lin & Liu, 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.15594235 |
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persistent identifier |
https://treatment.plazi.org/id/84107380-FC69-59D6-BEEF-836C05C973DD |
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treatment provided by |
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scientific name |
Microichthyurus guangxiensis Y. Yang, Lin & Liu |
| status |
sp. nov. |
Microichthyurus guangxiensis Y. Yang, Lin & Liu sp. nov.
Figs 14 A, B View Figure 14 , 15 A View Figure 15 , 16 A View Figure 16 , 17 A View Figure 17 , 18 A ‒ D View Figure 18 , 19 A, B View Figure 19
Etymology.
The specific name is derived from the name of the type locality, Guangxi, China.
Type material.
Holotype. China ‒ Guangxi Zhuang Autonomous Region • ♂; Longsheng, Huaping, Anjiangping ; 1345 m; 31-V-2023; sweeping; H. Q. Lin & S. L. Yuan leg.; MHBU.
Paratypes. China ‒ Guangxi Zhuang Autonomous Region • 5 ♂♂ 5 ♀♀; same data as holotype; MHBU .
Diagnosis.
The species resembles M. hubeiensis Y. Yang, Lin & Liu, 2024 , in the habitus and the general shape of aedeagus but could be easily differentiated from the latter by the following characters: abdominal tergite VIII of male (Fig. 15 A View Figure 15 ) 1.1 times wider than long; abdominal sternite VIII of male (Fig. 16 A View Figure 16 ) with lateral portions phone-shaped, moderately emarginate in middle of inner margins, without any protrusions at apices; aedeagus with median lobe acute at one latero-apical portion and rounded at the opposite portion (Fig. 18 A, D View Figure 18 ). Unlike in M. hubeiensis , abdominal tergite VIII of male ( Lin et al. 2024 a: fig. 4 c) is 1.1 times longer than wide; abdominal sternite VIII of male ( Lin et al. 2024 a: fig. 3 c) with lateral portions is slender and bisinuate at inner margins, each present with a small and sharply hooked protrusion at apex; aedeagus with median lobe rounded at latero-apical portions ( Lin et al. 2024 a: fig. 10 a ‒ d).
Description.
Body length (both sexes): 4.5‒4.8 mm (4.8 mm in holotype); body width (both sexes): 0.9‒1.1 mm (0.9 mm in holotype).
Male (Fig. 14 A View Figure 14 ). Coloration. Body black, but yellow at antennomeres I ‒ II and III ventrally, apical 1 / 3 parts of elytra, pro- and meso-coxae, trochanters, basal half parts of femora, meta-coxae, and trochanters.
Eyes large, interocular distance about 0.4 times as wide as diameter of an eye. Antennae extending to posterior margin of abdomen tergite IV, antennomeres II about 1 / 3 length of I, III ‒ X subequal and about twice longer than II, XI about 2 / 3 length of X.
Pronotum nearly as long as wide, anterior margin arcuate, posterior margin bisinuate, lateral margins subparallel, anterior angles rounded, and posterior angles nearly rectangular. Elytra 1.3 times longer than wide, 1.9 times longer than pronotum, with lateral margins subparallel, sutures slightly dehiscent from the base, the distance between sutures narrower width of the elytron, apices rounded.
Abdominal tergite VIII (Fig. 15 A View Figure 15 ) 1.1 times wider than long, with lateral margins arcuate, postero-lateral projections about 1 / 3 length of the tergite, and feebly arcuate at inner margins. Abdominal sternite VIII (Fig. 16 A View Figure 16 ) trilobed, with lateral portions converging posteriorly to each other, phone-like and about 2.5 times as long as basal width, roundly emarginate in middle of inner margins, nearly rectangular at apices; middle portion 1.1 times wider than long, widened posteriorly, nearly straight at posterior margin, and rounded at latero-apical angles. Proctiger (Fig. 17 A View Figure 17 ) semicircular and narrowed posteriorly, completely surrounded by paraproct, obviously bordered along lateral margins. Paraproct (Fig. 17 A View Figure 17 ) semicircular and obviously bordered along lateral margins, slightly emarginate in middle of posterior margin, around which covered with a few slightly long pubescence (with tergal flange destroyed).
Aedeagus (Fig. 18 A ‒ D View Figure 18 ): left ventral paramere strongly twisted, bisinuate in dorsal and ventral views (Fig. 18 A, D View Figure 18 ), bifurcate at apex (Fig. 18 A ‒ D View Figure 18 ); left dorsal paramere half-length of left ventral paramere, lamellar and widely rounded at apex (Fig. 18 B, D View Figure 18 ); right paramere about 4 / 5 length of left ventral paramere, strongly twisted, compresses laterally and abruptly thinned near apex, acute at apex (Fig. 18 A ‒ D View Figure 18 ); median lobe moderately sclerotized and 1.2 times longer than parameres, grooved at basal part and pocket-shaped at apical part, distinctly protruding on latero-apical portions, the protrusions stout (Fig. 18 A, D View Figure 18 ).
Female (Fig. 14 B View Figure 14 ). Similar to males, but body larger, abdominal tergite VIII (Fig. 19 A View Figure 19 ) about 1.5 longer than wide, lateral projections about 1 / 6 length of the tergite and slightly arcuate at inner margins; abdominal sternite VIII (Fig. 19 B View Figure 19 ) about 1.2 times longer than wide, with lateral margins slightly converging posteriorly, posterior margin slightly arcuate, and latero-apical angles rounded.
Distribution.
China (Guangxi).
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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