Themus (Haplothemus) bimaculaticollis Y. Yang et Su

Su, Junyan, Yang, Yuxia & Yang, Xingke, 2015, Description of three new species related to Themus (Haplothemus) coriaceipennis (Fairmaire, 1889) (Coleoptera: Cantharidae), Zootaxa 4034 (2), pp. 375-389 : 385-387

publication ID	https://doi.org/ 10.11646/zootaxa.4034.2.9
publication LSID	lsid:zoobank.org:pub:B4EE0E6A-7332-48D8-92D6-C1E14E87F1A3
DOI	https://doi.org/10.5281/zenodo.6098511
persistent identifier	https://treatment.plazi.org/id/557EC324-0045-FF9E-FF39-FC310CD5FBF0
treatment provided by	Plazi
scientific name	Themus (Haplothemus) bimaculaticollis Y. Yang et Su
status	sp. nov.

Treatment

Themus (Haplothemus) bimaculaticollis Y. Yang et Su , sp. nov.

Figs. 2 View FIGURE 2 A‒B, 4A‒C, 5C, 8

Type material. Holotype male ( MHBU): CHINA, Sichuan, Yuexi, Shenguozhuzang, 6.viii.2011, leg. Fu-Ming Shi & Le-Hong Zhao. Paratypes: CHINA, Sichuan: 2 males ( MHBU): same data as the holotype; 1 male, 1 female ( MHBU): same locality and collectors, 8.viii.2011; 1 male, 1 female ( MHBU): Yunnan, Weixi, 2175m, 23.‒25.vii.2008, leg. Ji-Shan Xu & Zhen-Hua Gao; 1 male ( MHBU): Yunnan, Cangshan, Dashaodi, 2500m, 25.vii.2009, leg. Zi-Zhong Yang; 1 male ( MHBU): Yunnan, Heqing, Maershan, 2400m, 22.viii.2008, collectors unknown; 1 male ( NAFU): Yunnan, Diancangshan, 2173m, 4.viii.2005, leg. Meng Li; 1 male ( NAFU): same locality and collector, 5.viii.2005. [above all are transliterated from Chinese labels]; 1 male ( NHMB): “Szechuen, CHINA DCGraham, bet. Fu Lin & Yueh Shi 4000-8000ft, Jul20-21 '28”.

Distribution. China (Sichuan, Yunnan).

Description. Male ( Fig. 2 View FIGURE 2 A). Head black, mouthparts black, dark brown at mandibles, yellow at labium except labial palpi, antennae black, prothorax yellow, pronotum with two small round black markings in center of disc and separated on both sides of middle line, scutellum yellow, elytra black, legs black, coxae, trochanters and basal halves of femora yellow, meso- and metasterna and abdomen yellow. Body densely covered with recumbent dark brown pubescence, mixed with slightly long semierect pubescence on elytra and a few long hairs along anterior margin of clypeus.

Head rounded, densely and finely punctate, surface lustrous; eyes moderately protruding, head breadth across eyes slightly wider than anterior margin of pronotum; terminal maxillary palpomeres widest nearly in middle, arcuate and sharp at apical halves of inner margins, rounded at apices; antennae almost extending to elytral midlength, antennomeres II about 3 times as long as wide at apices, III slightly shorter than II, IV about 1.5 times as long as III, V‒XI each with a small round to narrow short longitudinal impression near middle of outer margin, XI slightly longer than X and pointed at apices.

Pronotum subquadrate, about 1.17 times as wide as long, anterior margin arcuate, lateral margins nearly parallel, posterior margin arcuate and narrowly bordered, anterior angles nearly rectangular, posterior angles subrounded, disc convex at posterolateral parts, surface slightly sparsely and finely punctate, lustrous.

Elytra about 4.2 times longer than pronotum, 3.2 times longer than humeral width, lateral margins nearly parallel, disc coarsely and densely punctate, matt.

Aedeagus ( Figs. 4 View FIGURE 4 A‒C): ventral process of each paramere abruptly widened near base, with apex rounded on dorsal side and largely hooked on ventral side in lateral view; conjoint dorsal plate of parameres slightly shorter than ventral processes, evenly narrowed apically and slightly narrower than distance between the ventral processes, moderately triangularly emarginated in middle of apical margin; laterophyses flattened and adhered to dorsal side of median lobe, with inner margins evenly diverging apically, outer apical angles widely triangular.

Female ( Fig. 2 View FIGURE 2 B). Similar to male, but eyes less protruding; antennae slightly narrower and shorter, extending to basal one-third length of elytra, antennomeres V‒XI without impressions; pronotum about 1.30 times as wide as long, lateral margins slightly sinuate and diverging posteriorly, disc slightly convex at posterolateral parts; elytra about 3.0 times longer than humeral width, with lateral margins slightly diverging posteriorly. Abdominal sternite VIII ( Fig. 5 View FIGURE 5 C) largely and subtriangularly emarginated in middle of posterior margin, which is slightly protuberant at apex of lateral portion beside middle emargination. Internal reproductive organ of genitalia ( Fig. 8 View FIGURE 8 ): vagina stout, with diverticulum and spermatheca situated at apex, median oviduct in middle of ventral side; diverticulum moderately long tube-shaped, slightly narrowed apically and rounded at apex; spermatheca moderately long sacshaped, slightly expanded apically and rounded at apex, which is nearly as long as diverticulum, and provided with a long and thin accessory gland near base; diverticulum and spermatheca surrounded with a strongly sclerotized ring at base, which is confluent in middle and extending to median oviduct on ventral side, the opening of spermatheca arising from middle of the sclerotized ring on dorsal side.

Body length: 18.0‒22.0 mm; width: 3.5‒5.0 mm.

Diagnosis. This species is similar to T. (H.) coriaceipennis ( Fairmaire, 1889) , but differs in the following characters: the pronotum yellow, with two small round black markings in center of disc, while in the latter species, pronotum black, more or less yellow at margins and sometimes on posterior part of middle line; aedeagus: conjoint dorsal plate of parameres normal at apical part of inner surface, while in the latter, convex at apical parts of inner surface; abdominal sternite VIII of female largely and subtriangularly emarginated in middle of posterior margin, while in the latter, narrowly emarginated.

Etymology. The specific name is derived from the Latin bi (two), maculatus (spotted) and collum (thorax), referring to its pronotum with two black markings.