Stenothemus jindraimimus Y. Yang & X. Yang, 2021

Yang, Yuxia, Ge, Shujuan, Yang, Xingke & Liu, Haoyu, 2021, Taxonomic revision of the species of Stenothemus from Southwest China (Coleoptera, Cantharidae), with the descriptions of five new species, European Journal of Taxonomy 757 (1), pp. 1-36 : 28-29

Stenothemus jindraimimus Y. Yang & X. Yang sp. nov.

urn:lsid:zoobank.org:act:3BA9E362-3F39-4413-B04B-FF1CB6549998

Figs 9D , 10G‒I

Differential diagnosis

Resembles S. jindrai ( Fig. 5A ), but differs in the following characters: pronotum and elytra uniformly light yellow, while pronotum dark brown, lightened at anterior angles, elytra honey yellow, sienna at humeri and outer part in S. jindrai ; aedeagus:apex of dorsal plate slightly narrowed, middle emargination between dorsal plates moderately deep, nearly as long as half its length, apical parts of laterophyses reaching middle emargination between dorsal plates, while dorsal plate strongly narrowed, middle emargination much longer than half length, laterophyses clearly exceeding middle emargination in S. jindrai ( Švihla 2004: figs 155‒156).

Etymology

The specific name is derived from the Latin ‘ mimus ’ (‘imitate’), and the name of the similar species S. jindrai .

Material examined

Holotype

CHINA • ♂; Sichuan, Emei Shan, Xixiangchi ; 1800‒2000 m a.s.l.; 11‒12 May 1957; F.X. Zhu leg.; IZAS IOZ(E) 1389239 .

Description

Body length: ♂ 6.6 mm; width: 1.5 mm.

Male ( Fig. 9D )

COLORATION. Body light yellow, head, mouthparts, antennae and tarsi light brown. Body densely covered with short, semi-recumbent yellow pubescence.

HEAD. Subquadrate, surface sparsely and finely punctate, each side with a smooth and rectangular impression behind antennal socket; eyes strongly protruding, head width across eyes 1.5 times wider than pronotum; terminal maxillary palpomeres long-triangular, widest in middle; antennae filiform, extending ¾ of the length of elytra, antennomeres II about 1.7 times as long as wide at apices, III about 1.9 times longer than II, IV longest, XI slightly longer than X, pointed at apex.

PRONOTUM. Subrounded, about 0.9 times as long as wide, anterior margin nearly straight, anterior angles roundly truncate, lateral margins slightly sinuate, posterior margin nearly straight and narrowly bordered, posterior angles sharp, protruding, disc distinctly convex on posterolateral parts, surface finely and densely punctate.

ELYTRA. Nearly parallel-sided, about 3.7 times as long as humeral width, 6.1 times as long as pronotum, surface finely and densely punctate, with hardly visible longitudinal costae.

AEDEAGUS ( Figs 10G‒I ). Weakly swollen dorsally in basal part, reduced basally in diameter; basal piece slightly shorter than dorsal plate of each paramere, with a large, bifurcate conjoined middle nodule at base of ventral side; ventral processes of parameres approaching each other, long and slightly narrowed apically, bent ventrally in lateral view; dorsal plates slightly longer than ventral processes, evenly narrowed apically, apex slightly acute and bent ventrally, outer margins of dorsal plates folded ventrally; apical parts of laterophyses depressed and next to each other in middle, apex acute, reaching middle emargination between dorsal plates.

Female

Unknown.

Distribution

China (Sichuan).

Figures

Fig. 9. Habitus, dorsal view. A. Stenothemus gracilis Y. Yang & X. Yang sp. nov., holotype, ♂ (MHBU HBU(E) 410022).B. S. chongqingensisY.Yang & H. Liusp. nov., holotype, ♂ (MHBU HBU(E) 410028). C. S. flavicollis Y. Yang & S. Ge sp. nov., holotype, ♂ (MHBU HBU(E) 410029). D. S. jindraimimus Y. Yang & X. Yang sp. nov., holotype, ♂ (IZAS IOZ(E) 1389239). E. S. laticornis Y. Yang & H. Liu sp. nov., holotype, ♂ (MHBU HBU(E) 410045). Scale bars = 1.0 mm.

Fig. 10.Aedeagus (A, D, G = ventral view; B, E, H = dorsal view; C, F, I = lateral view).A‒C. Stenothemus chongqingensis Y. Yang & H. Liu sp. nov., holotype (MHBU HBU(E) 410028). D‒F. S. flavicollis Y. Yang & S. Ge sp. nov., holotype (MHBU HBU(E) 410029). G‒I. S. jindraimimus Y. Yang & X. Yang sp. nov., holotype (IZAS IOZ(E) 1389239). Scale bars: 0.5 mm.

Fig. 5. Habitus, dorsalview.A. Stenothemus jindraiŠvihla, 2004, holotype, ♂ (NMPC).B. S. minutissimus (Pic, 1933) comb. nov., holotype, ♂ (MNHN). C. S. tryznai Švihla, 2004, holotype, ♂ (NMPC). D. S. singularicollis (Pic, 1933) comb. nov., holotype, ♀ (NHMH). E. S. melleus Švihla, 2005 syn. nov., holotype, ♂ (= S. singularicollis) (NMPC). Scale bars = 1.0 mm.