Rhagonycha (s.str.) guizhouensis Y. Yang, Liu & X. Yang, 2024
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publication ID |
https://doi.org/ 10.11646/zootaxa.5534.1.1 |
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publication LSID |
lsid:zoobank.org:pub:C36ED8DA-FCF2-44FE-A38E-41112A1C0D6D |
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DOI |
https://doi.org/10.5281/zenodo.14023676 |
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persistent identifier |
https://treatment.plazi.org/id/F9023D04-FFC8-FFF6-FF69-E6943BF4EDE2 |
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treatment provided by |
Plazi |
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scientific name |
Rhagonycha (s.str.) guizhouensis Y. Yang, Liu & X. Yang |
| status |
sp. nov. |
Rhagonycha (s.str.) guizhouensis Y. Yang, Liu & X. Yang , sp. nov.
( Figs 29D View FIGURE 29 , 30D View FIGURE 30 , 31C‒D View FIGURE 31 , 32D‒F View FIGURE 32 , 36 View FIGURE 36 )
Type material. HOLOTYPE: ♂ ( IZAS), CHINA, Guizhou: Fanjingshan , 5.IV.2000, leg. C.S. Wu. PARATYPE: CHINA, Guizhou: 1♀ ( IZAS), same data as the holotype .
Differential diagnosis. It looks similar to Rh. flavimima sp. nov. in the general shape of aedeagus, but can be distinguished from the latter by the following characters: femora uniformly yellow, while bicolored and black dorsally in Rh. flavimima sp. nov.; pronotum with a black rounded spot in center of disc, while with a black longitudinal median band in Rh. flavimima sp. nov. ( Fig. 19A, B View FIGURE 19 ); aedeagus: conjoint dorsal plate of parameres feebly bent ventrally in lateral view, with the middle emargination nearly as deep as that between conjoint dorsal plate and ventral process, while strongly bent ventrally, with the middle emargination shallower in Rh. flavimima sp. nov. ( Fig. 20C View FIGURE 20 ); ventral process of each paramere wider and acute at apex, with a small-triangular protuberance along dorsal margin in lateral view, while narrower and narrowly rounded at apex, without any protuberance in Rh. flavimima sp. nov. ( Fig. 20C View FIGURE 20 ).
Description. Body length: 7.4‒8.4 mm (7.4 mm in holotype); width: 2.0‒ 2.4 mm (2.0 mm in holotype).
Male ( Fig. 31C View FIGURE 31 ). Coloration. Body black except for the following parts: head yellowish orange but black at vertex, pronotum yellowish orange, with a black marking before center and feebly darkened at posterolateral parts of disc, femora, coxae and trochanters yellowish orange, elytra pale yellow, each elytron with a wide longitudinal median black band that extending behind humerus to apex and and narrower in the anterior part than the posterior part. Surface sparsely and finely yellow pubescent, anterior margin of clypeus fringed with pale bristles.
Head rounded, surface densely and finely punctate; eyes moderately protruding, head width across eyes about 1.1 times pronotum; terminal maxillary palpomeres subtriangular, widest at apical third; antennae extending to basal 3/4 length of elytra when reclined, antennomeres II shortest, about 1.7 times as long as wide at apices, III about 3.3 times longer than II, VII longest, XI feebly longer than X and pointed at apices.
Pronotum transverse, about 1.1 times as long as wide, anterior margin rounded, anterior angles subrounded, lateral margins feebly diverging posteriorly, posterior margin nearly straight, posterior angles sub-rectangular, disc strongly convex on posterolateral parts, surface finely and sparsely punctate.
Elytra with lateral margins feebly diverging posteriorly, about 3.1 times as long as humeral width, 5.1 times longer than pronotum, surface finely rugulose-lacunose, almost lustrous at basal parts.
Aedeagus moderately swollen laterally in middle ( Fig. 32D View FIGURE 32 ); ventral processes of parameres abruptly thinned apically near bases, slender and even in width, bent to each other in ventral view ( Fig. 32D View FIGURE 32 ), moderately wide and bent dorsally in lateral view, acute at apices, with a small-triangular protuberance in middle of dorsal margin ( Fig. 32F View FIGURE 32 ); conjoint dorsal plate of parameres distinctly shorter than ventral processes ( Fig. 32F View FIGURE 32 ), with apical margin triangularly and moderately deeply emarginate in middle, lateral margins moderately diverging apically, latero-apical angles acute in dorsal view ( Fig. 32E View FIGURE 32 ), and feebly bent ventrally in lateral view ( Fig. 32F View FIGURE 32 ); emargination between ventral process and conjoint dorsal plate about 1/4 length of aedeagus ( Fig. 32F View FIGURE 32 ).
Female ( Fig. 31D View FIGURE 31 ). Similar to male, but with larger and stouter body, antennae thinner, head width across eyes about as wide as anterior margin of pronotum, pronotum wider and about 1.2 times as wide as long, anterior margin less arcuate, lateral margins nearly parallel-sided, disc feebly convex on posterolateral parts, elytra yellowish brown at humeri, about 3.0 times as long as humeral width, with lateral margins moderately diverging posteriorly.
Internal organ of reproductive system ( Fig. 29D View FIGURE 29 ): vagina stout and abruptly thinned at ventroapical portion into a short and feebly stout tube, where diverticulum and spermathecal duct arising separately; diverticulum short and spiral, progressively thinned apically; spermathecal duct short and about 1/3 length of apical tube of vagina; spermatheca provided with a spiral tube, progressively thinned apically and obviously longer than diverticulum; accessory gland moderately long, about 1.5 times as long as spermatheca.
Abdominal sternite VIII ( Fig. 30D View FIGURE 30 ) moderately narrowed posteriorly, acute at latero-apical angles, and arcuately emarginate on both sides of posterior margin, with the portion between lateral emarginations arcuate at apex and not reaching apices of latero-apical angles.
Etymology. The specific name is derived from the name of the type locality, Guizhou, China.
Distribution ( Fig. 36 View FIGURE 36 ). China (Guizhou).
| 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.