Fissocantharis hainana Y. Yang & X. Yang

Yang, Yuxia, Qi, Yaqing & Yang, Xingke, 2018, Four new species of Fissocantharis Pic, 1921 (Coleoptera, Cantharidae) from China, ZooKeys 738, pp. 97-115 : 104-105

Fissocantharis hainana Y. Yang & X. Yang sp. n. Figs 1C, 3 A–C, 4C, 5C

Type material.

Holotype ♂ (IZAS): CHINA, Hainan, Diaoluoshan, 928m, 30.III.1980, leg. Y.X. Yang. Paratypes: CHINA, Hainan: 1♂, 1♀ (IZAS): same data as holotype; 1♀ (IZAS): same locality, 31.III.2008, leg. L.Y. Jiang; 1♀ (IZAS): Qiongzhong, Wuzhishan, 800m, date and collector unknown; 1♀ (IZAS): Qiongzhong, 800m, 5.IV.1980, collector unknown; 1♂ (IZAS): Wuzhishan, 936.8m, 18.54°N, 109.40°E, 2.IV.2008, leg. X. L. Chen; 1♀ (IZAS): Wuzhishan, 708-1206m, 18.89°N, 109.69°E, 9.IV.2010, leg. K.Y. Zhang; 1♂, 1♀ (IZAS): Qiongzhong, Limushan, 840m, 19.17°N, 109.72°E, 6.IV.2010, K.Y. Zhang; 1♂, 2♀♀ (IZAS): Baisha, Yinggeling, Nankai, 336m, 19.00°N, 109.22°E, 6.IV.2010, leg. M.Y. Lin; 3♀♀ (IZAS): "Hainan Prov., Lingshui, Diaoluoshan, Xin-an, 18.72510°N, 109.86861°E, 921m, 2007.03.25, Shi H.L., Yuan F. coll.".

Distribution.

China (Hainan).

Description.

Male (Fig. 1C). Body black, except mandibles brown, darkened at apices, prothorax orange, pronotum with a large black marking on disc, marking extending to anterior and posterior edges except at sides, and its posterior part wider than anterior part, elytra dark purple, with metallic reflection.

Head subquadrate, narrowed posteriorly behind eyes; eyes strongly projecting, head width across eyes wider than that of anterior edge of pronotum; apical maxillary palpomeres nearly long-triangular, widest at apical two-fifths, acute at apices; antennae nearly extending to elytral apices, antennomeres II nearly as long as wide, III–IX dorsoventrally flattened and obliquely widened apically, III about 3.0 times as long as II, IV–X subequal in length, X and XI parallel-sided, XI pointed at apices and slightly longer than X, III–XI each with a round or oblong smooth impression near middle of lateral edge.

Pronotum subquadrate, nearly as long as wide, widest near base, anterior edge rounded, sides sinuate, posterior edge nearly straight, anterior angles rounded, posterior angles nearly rectangular, disc convex at posterolateral parts, surface finely and densely punctate.

Elytra about 3.0 times longer than wide, 4.0 times longer than pronotum, width at humeri greater than posterior edge of pronotum, sides nearly parallel, surface slightly more coarsely and densely punctate than pronotum.

Legs with all tarsal claws bifid, each with lower projection as long as upper one.

Aedeagus (Fig. 3 A–C): ventral process of each paramere wide, slightly narrowed apically and hooked at apex; conjoint dorsal plate of parameres moderately developed, about one-third length of ventral process of each paramere, with apical edge acute in middle.

Female. Similar to male, but eyes only slightly projecting, antennae filiform and simple, extending to midlength of elytra, pronotum moderately convex at posterolateral parts. Abdominal sternite VIII (Fig. 4C) widely and shallowly emarginate at middle of posterior edge, bottom of middle emargination nearly straight, lateral angles rounded.

Internal genitalia (Fig. 5C): vagina abruptly extended apically as a long and thick duct at ventroapical portion; diverticulum and spermathecal duct arising from end of long duct of vagina; diverticulum thin, spiraled and moderately long; spermathecal duct nearly as long as and slightly thicker than diverticulum; spermatheca longer and slightly thicker than diverticulum, with a very long and thin accessory gland, which much longer than spermatheca.

Variation within type series.

Pronotum orange in some, only darkened at anterior and posterior margins, elytra dark blue, or with weakly metallic reflection. Body length: 7.0-11.5 mm; width: 1.3- 2.2 mm.

Etymology.

The specific name is derived from the type locality, Hainan Province, China.

Diagnosis.

Elytra dark purple, with metallic reflection; male antennae subfiliform, antennomeres III–IX dorsoventrally flattened and obliquely widened apically, III–XI each with a round or oblong smooth impression near middle of lateral edge; aedeagus: conjoint dorsal plate of parameres moderately developed, about one-third length of ventral process of each paramere, with apical edge acute in middle.

Remarks.

The new species is similar to F. langana (Pic, 1923) (located in N. Vietnam), F. langaniformis (Wittmer, 1989) (N. Vietnam) and F. sinensis (Wittmer, 1988) in the body coloration and male antennae, but can be distinguished by the structure of the aedeagus: the conjoint dorsal plate of parameres is moderately developed, about one-third length of ventral process of each paramere, with the apical edge acute in the middle, while it is greatly reduced in F. langana ( Wittmer 1988: fig. 29) and F. langaniformis ( Wittmer 1989: fig. 10), and about half length of ventral process in F. sinensis ( Yang et al. 2009: fig. 3 A–C).