Hexarhopalus (Hexarhopalus) yeziyangi, Jiang & Zhou & Liu & Huang & Chen, 2022

Jiang, Ri-Xin, Zhou, Qing-Hua, Liu, Yi-Feng, Huang, Yu-Zhou & Chen, Xiang-Sheng, 2022, Additional new species of the genus Hexarhopalus Fairmaire, 1891 (Coleoptera, Tenebrionidae: Cnodalonini) from China, Zootaxa 5141 (6), pp. 592-600 : 597-600

publication ID	https://doi.org/ 10.11646/zootaxa.5141.6.5
publication LSID	lsid:zoobank.org:pub:D85322EE-6469-4680-8F04-9AA46567E1A8
DOI	https://doi.org/10.5281/zenodo.6599741
persistent identifier	https://treatment.plazi.org/id/1C7D493D-FFFB-160E-14C7-F935FB60FE7A
treatment provided by	Plazi
scientific name	Hexarhopalus (Hexarhopalus) yeziyangi
status	sp. nov.

Treatment

Hexarhopalus (Hexarhopalus) yeziyangi sp. nov.

( Figs 1D–E View FIGURE 1 , 4 View FIGURE 4 , 5C View FIGURE 5 )

Type material. Holotype: CHINA: ♂, labeled ‘China: Jiangxi, Lushan City (庐山市), Lushan (庐山), Guniuling (牯牛岭), 10.X.2020, Ye Zi-Yang leg.’ ( MHBU) . Paratype: CHINA: ♀, with the same label data as the holotype ( MHBU) .

Description. Male ( Figs 1D View FIGURE 1 , 4A–H View FIGURE 4 ): Body long oval, convex, black and dull shinny.

Head ( Fig. 4A View FIGURE 4 ) transverse, widest across compound eyes. Vertex finely covered with small punctures and each puncture bearing a short, thin seta. Genae and epistoma covered with denser punctures and setae relative to punctures and setae on vertex. Labrum black, narrower than epistoma, covered with bristles of medium length in its apical portion. Antennal tubercles weakly prominent, antenna ( Fig. 4C View FIGURE 4 ) shorter than head plus pronotum, club composed of four apical antennomeres. Relative lengths of antennomeres: 0.29: 0.23: 0.47: 0.43: 0.37: 0.39: 0.40: 0.37: 0.26: 0.26: 0.43; relative widths of antennomeres: 0.27: 0.24: 0.23: 0.23: 0.24: 0.24: 0.31: 0.36: 0.33: 0.34: 0.35. Antennomere I slightly expanded; antennomere II shortest, about as long as wide; antennomere III longest, about 2× as long as antennomere II, antennomeres IV–VI similar, shorter than antennomere III, antennomere VII about as long as wide, nearly trapezoidal, antennomeres VIII–X wider than long, IX and X shorter than XIII, antennomere XI with apex rounded.

Pronotum ( Fig. 4A View FIGURE 4 ) about as long as wide, widest at anterior 1/3; dorsal surface covered with dense small punctures and short setae; mediolongitudinal sulcus thin and shallow but visible, both sides with a shallow depression; pronotal groove thin but obvious basally, absent in anterior part, and wide and shallow at lateral margin ( Fig. 4B View FIGURE 4 ). Prosternum distinctly raised before procoxae, surface wrinkled with sparse short setae; apex of prosternal process rounded.

Elytra ovoid, about 1.5× longer than wide in dorsal view, humerus strongly narrowed, widest at apical 2/5, disc with regular rows of foveolated large, shallow punctures; scutellum transverse, nearly triangular; wings completely reduced.

Metaventrite and abdomen finely covered with short thin setae and dense small punctures; median sulcus distinct, extending from anterior margin to ca. 3/4 of metaventrite length. Abdominal ventrite I longest, shorter than combined lengths of ventrites III and IV; ventrite II longer than metaventrite III; metaventrites III and IV distinctly concave; ventrite V slightly shorter than combined lengths of ventrites III and IV, apex rounded; apical margin of abdominal ventrite VIII ( Fig. 4D View FIGURE 4 ) medially impressed, posterior and lateral margins bearing sparse long setae.

Femora claviform medially, expanded in distal halves; all tibiae covered with brown setae apically; pro- and mesotibiae weakly curved, metatibia straight; tarsomeres simple, apical pro- and mesotarsomeres about as long as combined lengths of proximal four tarsomeres, apical metatarsomere shorter than combined lengths of proximal three metatarsomeres.

Aedeagus ( Figs 4F–H View FIGURE 4 ) symmetrical in dorsal view, distinctly curved in profile; spiculum gastrale ( Fig. 4E View FIGURE 4 ) asymmetrical, short, with large apical lobes.

Measurements: BL 14.2 mm, HL 1.9 mm, HW 2.8 mm, PL 3.9 mm, PW 4.2 mm, EL 8.4 mm, EW 5.1 mm.

Female ( Fig. 1E View FIGURE 1 ): Similar to male. Posterior margin of ventrite VIII ( Fig. 4I View FIGURE 4 ) rounded, weakly impressed at middle and covered with sparse long setae. Spiculum ( Fig. 4I View FIGURE 4 ) slightly tortuous, apex rounded and slightly dilated. Apex of ovipositor ( Fig. 4J View FIGURE 4 ) with two long and two short setae.

Measurements: BL 15.0 mm, HL 2.0 mm, HW 2.9 mm, PL 4.2 mm, PW 4.3 mm, EL 8.8 mm, EW 5.7 mm.

Differential diagnosis. The new species is quite different from all other Chinese species of Hexarhopalus owing to the rows of elytra formed of regular and distinctly shallower foveolated punctures, while the punctures of the rows of elytra are more unordered or strongly foveolated in other species of Hexarhopalus .

Distribution. China: Jiangxi.

Biology. Adults of this species were collected on tree trunks at night ( Fig. 5C View FIGURE 5 ).

Etymology. The specific epithet honors Mr. Zi-Yang Ye, collector of the new species.