Lycocerus pictus ( Wittmer, 1983 )

Hsiao, Yun, Okushima, Yûichi, Yang, Ping-Shih & Ko, Chium-Cheng, 2016, Taxonomic revision of the Lycocerus hanatanii species group (Coleoptera, Cantharidae), with the description of new species from Taiwan, European Journal of Taxonomy 170, pp. 1-33 : 8-10

Lycocerus pictus ( Wittmer, 1983)

Figs 2 A–B, 3A–C, 6A–B, 7

Athemellus pictus Wittmer, 1983: 170 .

Lycocerus pictus – Okushima 2005: 242. — Okushima 2008: 282, fig. 26. — Kazantsev & Brancucci 2007: 253. — Satô et al. 2015: 51.

Diagnosis

This species resembles L. yitingi Hsiao & Okushima sp. nov.; the differential diagnosis is given in Table 2 .

Material examined

Holotype

TAIWAN: ♂, Nan shan chi , Nantou Hsien, 9–11 Mar. 1980, T. Shimomura leg. ( NHMB).

Paratypes

TAIWAN: 10 ex, same data as for holotype ( NHMB).

Other material

TAIWAN: 15 ♂♂, 7 ♀♀, Nanshanchi, Nantou, 27 Mar. 1981, H. Yoshimoto leg. ( KURA); 1 ♀, Hsileng, Taouan , 26 Apr. 1982, N. Obayashi leg. ( KURA); 13 ♂♂, 5 ♀♀, Nanshanchi, Nantou, 13 Apr. 1985, Y. Kusakabe leg. ( KURA); 1 ♀, Kukuan, Taichung, 11–12 May 1986, C.- S. Lin leg. ( NMNS); 4 ♂♂, 3 ♀♀, Nanshanchi, Nantou, 5 Apr. 1988, C. Lou leg. ( KURA); 1 ♂, Baling, Taoyuan, 5 Apr. 1991, Y. Okushima leg. ( KURA); 1 ♀, Shitzutou, Nantou, 9 Apr. 1991, Y. Okushima leg. ( KURA); 28 ♂♂, 37 ♀♀, Nanshanchi, Nantou, 10 Apr. 1991, Y. Okushima leg. ( KURA); 1 ♂, 3 ♀♀, Kukuan, Taichung, 11 Apr. 1991, Y. Okushima leg. ( KURA); 1 ♀, Shitzutou, Nantou, 12 Apr. 1991, Y. Okushima leg. ( KURA); 1 ♂, Nanshanchi, Nantou, 12 Apr. 1991, K. La leg. ( KURA); 4 ♂♂, 10 ♀♀, Nanshanchi, Nantou, 3 Apr. 1993, K. Okajima & T. Nonaka leg. ( KURA); 4 ♂♂, Nanshanchi, Nantou, 6 Apr. 1993, T. Nonaka leg. ( KURA); 3 ♀♀, Wushe, Nantou, 28–29 Apr. 1993, C.- S. Lin & W.- T. Yang leg. ( NMNS); 4 ♂♂, 14 ♀♀, Lushan Hot Spring, Nantou, 24 Apr. 1994, T. Kishimoto leg. ( KURA); 1 ♂, Gauvaw [= Luofu ], 380 m, Taovuan , 25 Apr. 1996, L.- J. Wang leg. ( KURA); 4 ♂♂, 3 ♀♀, Nanshanchi, Nantou, 21 Mar. 1998, F. Hayashi leg. ( KURA); 3 ♂♂, Chunyang, Nantou, 12 Mar.–9 Apr. 2002, C.- S. Lin & W.- T. Yang leg. ( NMNS); 1 ♂, 1 ♀, Nanshanshi, Nantou, 1 Apr. 2012, Y.- T. Wang leg. ( YHC); 1 ♀, Puli, Nantou, Apr. 2014, C.- H. Wu leg. ( YHC); 2 ♂♂, Chungyang, Nantou, 4 May 2014, Y. Hsiao leg. ( YHC); 1 ♀, Simashuan Forest Trail, 500m, Miaoli, Y. Hsiao leg. ( YHC).

Redescription

Coloration

Eyes black. Head dark yellow, with black marking on vertex. Antennae dark yellow or black, with first two or three segments and basal parts of remaining segments dark yellow. Pronotum dark yellow, with black marking in medio-longitudinal part. Elytra completely pale yellow or slightly dark in narrow suture. Legs dark yellow, with apical parts of femora, tibiae and tarsi blackish. Prosternum dark yellow, mesoventrites, metaventrites and abdomen black, with margin of abdominal ventrites and entire abdominal ventrite VII yellowish brown. Body closely covered with fine yellowish pubescence; anterior margin of clypeus fringed with pale bristles; antennae, elytra and legs with some yellowish bristles intermingled with primary pubescence.

Male ( Fig. 2A )

HEAD. Nearly as long as wide; vertex faintly hollowed, depressed along apical margin of clypeus and in lateral areas before eyes; surface densely and finely punctate and semilustrous; anterior margin of clypeus arcuate and faintly indented in middle; eyes not so large, globular and slightly prominent, ratio of eye diameter to interocular space 1:4.4; terminal labial palpomeres rounded ax-shaped; terminal maxillary palpomeres rounded ax-shaped; antennae filiform, extending to elytral midlength; antennomere I clavate, II short and a little expanded apicad, III to XI subcylindrical, all antennomeres without groove, ratio of antennomere lengths: 13: 10: 13:15: 16: 16: 14: 14: 13.5:13: 14.

PRONOTUM. Subquadrate, slightly narrower than head, nearly as long as wide; anterior and posterior margins moderately arcuate; lateral margins feebly sinuate, slightly diverging posteriorly; anterior angles rounded; posterior angles obtuse; dorsum convex in postero-lateral and hollowed in antero-lateral areas; medio-longitudinal groove distinct in posterior half; surface smooth and semilustrous. Scutellum triangular, with rounded apex.

ELYTRA. Conjointly about 1.4 times as wide as pronotum, about 3.0 times as long as wide, sides subparallel; surface densely and finely punctate and without luster.

LEGS. Moderately slender; femora mostly straight; tibiae mostly straight, with basal part feebly arcuate; claws simple.

AEDEAGUS ( Fig. 3 A–C). Ventral process expanded apically, apex curved inwards, basal part broad and extending inwards onto ventral side; dorsal plate of each paramere as long as ventral process, stout and subtruncated, slightly narrowed apically, apical margin with some hairs on it, concave on inner margin. Laterophyse very short, with pointed apex, invisible in lateral view. Inner sac swollen apically, somewhat shorter than tegmen.

Body length 4.00– 5.50 mm; width 1.00– 1.50 mm.

Female ( Fig. 2B )

Similar to male. Body wider than in male. Eyes somewhat smaller than in male, ratio of eye diameter to interocular space 1:4.9. Antennae distinctly shorter than in male, barely exceeding humeri, ratio of antennomere lengths: 13.5: 10: 13:15: 15: 14: 14: 14: 13:12: 14.

PRONOTUM. Nearly as wide as head, about 1.10 times as long as wide. Elytra conjointly about 1.5 times as wide as pronotum, about 2.6 times as long as wide. Claws simple. Abdominal ventrite VII widely emarginate on each side of terminal margin, forming subtriangular lateral lobes, median lobe moderately developed and triangularly concave in middle, median lobe indistinct in some specimens ( Fig. 6A ).

FEMALE GENITALIA ( Fig. 6B ). Vagina broad and rounded, abruptly extended apically as a long and thick duct; diverticulum and spermathecal duct arising from apex of long duct of vagina; diverticulum moderately thin and spiral; spermathecal duct shorter than diverticulum; spermatheca provided with thin spiral tube, tube longer than diverticulum; accessory gland thin, shorter than spermatheca.

Body length 5.00–6.00 mm; width 1.50–1.75 mm.

Remarks

Individuals of this species were observed visiting flowers of Lauraceae during the day.

Distribution ( Fig. 7 )

Taiwan (endemic).

Figures

Fig. 2. Habitus, dorsal view. A–B. Lycocerus pictus (Wittmer, 1983). C–E. L. yitingi Hsiao & Okushima sp. nov. F–G. L. araticollis (Fairmaire, 1897). H–I. L. griseopubens (Pic, 1928). J–M. L. nigripennis (Pic, 1938). N–O. L. aurantiacus Hsiao & Okushima sp. nov. P–Q. L. evangelium Hsiao & Okushima sp. nov. R. L. kintaroi Hsiao & Okushima sp. nov. C, F, H, J, N, P, R. Name-bearing types. D, O, Q. Paratypes. A–B, E, G, I, K–M. Non-type specimens. A, C, F–G, I, K–L, N, P, R. Male. B, D–E, H, J, M, O, Q. Female. Scale bars: 1.0 mm.

Fig. 3. Aedeagus. A–C. Lycocerus pictus (Wittmer, 1983). D–F. L. yitingi Hsiao & Okushima sp. nov. A, D. Ventral view. B, E. Lateral view. C, F. Dorsal view. Scale bars: 0.5 mm.

Fig. 6. A–B. Lycocerus pictus (Wittmer, 1983). C–D. L. yitingi Hsiao & Okushima sp. nov. E–F. L. nigripennis (Pic, 1938). G–H. L. aurantiacus Hsiao & Okushima sp. nov. I–J. L. evangelium Hsiao & Okushima sp. nov. A, C, E, G, I. Abdominal ventrite VII of female. B, D, F, H, J. Female genitalia, lateral view. Scale bars: A, C, E, G, I = 1.0 mm; B, D, F, H, J = 0.5 mm.

Fig. 7. Distribution map of Lycocerus pictus (Wittmer, 1983) and L. yitingi Hsiao & Okushima sp. nov. from Taiwan.