Rhagonycha (s.str.) ocula Y. Yang, Xiao & Liu, 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.14023668 |
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persistent identifier |
https://treatment.plazi.org/id/F9023D04-FFD0-FFEC-FF69-E3953A74EBEB |
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treatment provided by |
Plazi |
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scientific name |
Rhagonycha (s.str.) ocula Y. Yang, Xiao & Liu |
| status |
sp. nov. |
Rhagonycha (s.str.) ocula Y. Yang, Xiao & Liu , sp. nov.
( Figs 23D View FIGURE 23 , 24D View FIGURE 24 , 25C‒D View FIGURE 25 , 26D‒F View FIGURE 26 , 38 View FIGURE 38 )
Type material. HOLOTYPE: ♂ ( MHBU), CHINA, Yunnan: Suijiang, Luohanping , 23.VII.2017, leg. P. Wang & G. Wang. PARATYPES: CHINA, Yunnan: 4♀♀ ( MHBU), same data as holotype ; Chongqing: 1♂, 1♀ ( MHBU), Nanchuan, Jinfo Shan, 24.–28.VII.2003, leg. C. X. Yuan & Y. S. Liu.
Differential diagnosis. It looks like Rh. bimucronata in the body coloration, but is evidently different from the latter in the aedeagus: ventral process of each paramere strongly bent to each other in ventral view, while nearly straight in the latter ( Fig. 11A View FIGURE 11 ); conjoint dorsal plate of parameres with lateral margins nearly parallel, apical margin shallowly emarginate in middle, latero-apical angles rounded at apices in dorsal view, while lateral margins feebly diverging posteriorly, apical margin deeply emargination in middle, latero-apical angles acute in the latter ( Fig. 11B View FIGURE 11 ).
Description. Body length: 5.7‒7.3 mm (5.7 mm in holotype); width: 1.5‒1.8 mm (1.5 mm in holotype).
Male ( Fig. 25C View FIGURE 25 ). Coloration. Body yellow except for the following parts: antennae black except antennomeres Ⅰ yellowish orange, elytra pale yellow, almost transparent and feebly darkened at apices. Surface sparsely and finely yellow pubescent, anterior margin of clypeus fringed with pale bristles.
Head rounded, surface densely and finely punctate; eyes strongly protruding, head width across eyes as wide as anterior margin of pronotum; terminal maxillary palpomeres subtriangular, widest at apical third; antennae extending to basal 3/4 length of elytra when reclined, antennomeres II shortest, about 1.8 times as long as wide at apices, III about 2.4 times longer than II, VII longest, XI feebly longer than X and pointed at apices.
Pronotum transverse, about 1.2 times as wide as long, 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 densely punctate.
Elytra nearly parallel-sided, about 2.9 times as long as humeral width, 3.5 times longer than pronotum, surface finely rugulose-lacunose, almost lustrous at basal parts.
Aedeagus moderately swollen laterally near middle ( Fig. 26D, E View FIGURE 26 ); ventral processes of parameres abruptly thinned apically near bases, slender and thinned near apices, strongly bent to each other in ventral view ( Fig. 26D View FIGURE 26 ), and moderately bent ventrally in lateral view ( Fig. 26F View FIGURE 26 ); conjoint dorsal plate longer than ventral processes ( Fig. 26F View FIGURE 26 ), with apical margin shallowly and triangularly emarginate in middle, lateral margins nearly parallel-sided, latero-apical angels rounded in dorsal view ( Fig. 26E View FIGURE 26 ), feebly bent ventrally in lateral view ( Fig. 26F View FIGURE 26 ); emargination between ventral process and conjoint dorsal plate about 2/5 length of aedeagus ( Fig. 26F View FIGURE 26 ).
Female ( Fig. 25D View FIGURE 25 ). Similar to male, but with larger and stouter body, eyes less protruding, head width across eyes 1.1 times as wide as anterior margin of pronotum, antennae thinner and shorter, extending to apical third length of elytra when reclined, pronotum wider and about 1.2 times as wide as long, anterior margin less arcuate, disc feebly convex on posterolateral parts, elytra about 3.0 times as long as humeral width.
Internal organ of reproductive system ( Fig. 23D View FIGURE 23 ): vagina stout and abruptly thinned at ventroapical portion into a very long and thin tube, where diverticulum and spermathecal duct arising separately; diverticulum moderately long and spiral, evenly thin along the whole length; spermathecal duct very short and about 1/6 length of apical tube of vagina; spermatheca provided with a spiral tube, progressively thinned apically and shorter than diverticulum; accessory gland extremely long, about four times longer than spermatheca.
Abdominal sternite VIII ( Fig. 24D View FIGURE 24 ) moderately narrowed posteriorly, widely rounded at latero-apical angles, and feebly bisinuate at posterior margin.
Etymology. The specific name is derived from the Latin oculus (eye), referring to its strongly prominent eyes.
Distribution ( Fig. 38 View FIGURE 38 ). China (Yunnan, Chongqing).
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.