Lycocerus quadrilineatus Y. Yang & X. Yang

Yang, Yuxia, Su, Junyan & Yang, Xingke, 2014, Description of six new species of Lycocerus Gorham (Coleoptera, Cantharidae), with taxonomic note and new distribution data of some other species, ZooKeys 456, pp. 85-107 : 96-97

Taxon classification Animalia Coleoptera Cantharidae

Lycocerus quadrilineatus Y. Yang & X. Yang sp. n. Figs 6, 14-15, 31-33, 37, 41

Type material.

Holotype ♂ (ZIN): "N. Vietnam, Sa Pa env., 1200m, 20.V.1999, leg. Ozlov". Paratypes: 1♀ (ZIN): same data as holotype; 1♀ (ZIN): “ВЬЕТНАМ [Vietnam] горы, у ША-ПА [Sa Pa], 1600-2000m, 5.6.1963 г, Каьакое [Kabakov]".

Distribution.

Vietnam (Sa Pa).

Description.

Male (Fig. 6). Body black, mandibles dark brown, pronotum red, with a large dark brown marking, which almost extending to all margins of disc, elytra red, nearly black at the whole length of all elytral interstices.

Head evenly narrowed behind eyes, surface densely and finely punctate, semilustrous, covered with dense, fine, yellowish brown decumbent pubescence; eyes strongly protruding, head width across eyes distinctly wider than anterior margin of pronotum; terminal maxillary palpomere long-triangular, nearly truncate and sharp at apical one-third length of inner margin; antennae (Fig. 15) extending to apical one-fourth length of elytra, antennomeres II nearly as long as wide at apices, III–XI flattened, III–IX obliquely widened apically, nearly long-triangular, III about twice as long as wide at apices, IV slightly longer than III, X–XI nearly parallel-sided, XI slightly longer than X and pointed at apices, IV–XI each with a round smooth impression at apical part of outer margin.

Pronotum slightly longer than wide, widest near posterior margin, anterior margin rounded, anterior angles rounded, lateral margins moderately diverging posteriorly, slightly sinuate at anterior portion, posterior angles rectangular, posterior margin slightly arcuate and narrowly bordered, disc moderately convex at posterolateral parts, surface punctate and pubescent like that of head, matt.

Elytra about 4.3 times longer than pronotum, 3.5 times longer than humeral width, which about one-third wider than posterior margin of pronotum, lateral margins nearly parallel, elytral venations well-developed, moderately costate.

All tarsal claws simple.

Abdominal sternite IX long-triangular. Aedeagus (Figs 31-33): ventral process of each paramere normal and rounded at apex, even and nearly straight in lateral view; dorsal fig slightly shorter than ventral process, not narrowed apically, with inner angle rounded, outer angle obtuse-angled, inner margin nearly straight, apical margin rounded; laterophyse with apex pointed laterodorsally to outer angle of dorsal fig.

Female. Similar to the male, but eyes less protruding; antennae (Fig. 14) shorter, extending to basal one-third length of elytra, antennomeres III about 1.1 times longer than wide at apices, IV–XI without impressions; pronotum nearly as long as wide, disc slightly convex on posterolateral parts; elytra with lateral margins slightly diverging posteriorly; pro- and meso-outer and inner tarsal claws each with a basal projection; abdominal sternite VIII (Fig. 37) very slightly emarginated in middle and largely emarginated on both sides of posterior margin, the portion between middle and lateral emarginations indistinctly angled at apex; internal reproductive organ of genitalia see Fig. 41.

Body length (both sexes): 8.5-10.0 mm; width: 2.0-2.2 mm.

Etymology.

The specific name is derived from Latin quadrus (four) and linea (stripe), referring to its elytra darkened at all of the four elytral interstices.

Diagnosis.

This species can be easily distinguished from other species by the elytra darkened at all elytral interstices, elytral venation well-developed; all claws simple in male, pro- and meso-outer and inner tarsal claws each with a basal projection in female; aedeagus: dorsal fig of each paramere not narrowed apically.