Lycocerus hanatanii (Okushima, 1996)

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 : 5-6

Key to the species of the L. hanatanii species group

1. Coloration: mostly yellowish or blackish, with wide yellowish stripe on head, pronotum and elytra, respectively ....................................................................................................................................... 2

– Coloration: mostly blackish; pronotum completely black or fringed with yellowish margins or orange to yellowish brown, with black marking in middle; elytra completely black, or with small and slender yellowish brown stripes on humeri ............................................................................... 5

2. Head black, with frons yellowish; pronotum yellowish brown, with a large black marking in middle; aedeagus: dorsal plate of each paramere nearly touching on inner margin ( Fig. 1K ) ...................... 3

– Head dark yellow, with a black marking on the vertex; pronotum dark yellow, with a longitudinal black marking in middle, elytra completely pale yellow or fuscous, with pale yellow longitudinal stripe on each elytron; aedeagus: dorsal plate of each paramere concave on inner margin ( Fig. 1L ) ............................................................................................................................................ 4

3. Aedeagus: ventral process expanded apically, curved inwards; dorsal plate with a rounded apex; laterophyse acute and barely visible in lateral view ........................ L. hanatanii ( Okushima, 1996)

– Aedeagus: ventral process almost straight and slightly curved inwards; dorsal plate with a pointed apex; laterophyse stout and invisible in lateral view ................... L. ueharaensis ( Okushima, 1996)

4. Elytra completely pale yellow; aedeagus: laterophyse with pointed apex ( Fig. 3B ) ........................... .................................................................................................................... L. pictus ( Wittmer, 1983)

– Elytra fuscous, with wide pale yellow longitudinal stripe on each elytron; aedeagus: laterophyse with truncated apex ( Fig. 3E ) ................................................. L. yitingi Hsiao & Okushima sp. nov.

5. Aedeagus: dorsal plate of each paramere nearly touching on inner margin ( Fig. 1K ) ..................... 6

– Aedeagus: dorsal plate of each paramere concave on inner margin ( Fig. 1L ) ................................. 9

6. Pronotum completely black; aedeagus: apical margin of dorsal plate truncated ( Fig. 4B ) ........................................................................................................... L. araticollis ( Fairmaire, 1897)

– Pronotum completely black or orange, with a black marking in middle; aedeagus: apical margin of dorsal plate rounded ( Fig. 4C, G, J ) .................................................................................................. 7

7. Coloration of pronotum varying from completely black or orange, with a black marking in middle; aedeagus: dorsal plate longer than ventral process ................................... L. nigripennis ( Pic, 1938)

– Coloration of pronotum uniform, orange, with a black marking in middle; aedeagus: dorsal plate nearly as long as ventral process ...................................................................................................... 8

8. Surface of body lusterless; aedeagus: ventral process moderately expanded apically, curved inwards ................................................................................................... L. griseopubens ( Pic, 1928)

– Surface of body semilustrous; aedeagus: ventral process strongly expanded apically, slightly curved inwards ........................................................................... L. aurantiacus Hsiao & Okushima sp. nov.

9. Body and legs nearly black; aedeagus: apex of laterophyse more slender and acute ( Fig. 5B ) ........................................................................................ L. evangelium Hsiao & Okushima sp. nov.

– Pronotum black, fringed with yellowish margins; aedeagus: apex of laterophyse far from apical margin of dorsal plate in lateral view ( Fig. 5E ) ................... L. kintaroi Hsiao & Okushima sp. nov.

Figures

Fig. 1. Morphological characters used for the phylogenetic analysis and key. A–C. Terminal maxillary palpomere. D–E. Eyes. F–H. Pronotum. I–J. Leg. K–L. Inner margin of dorsal plate of aedeagus.

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. 4. Aedeagus. A–B. Lycocerus araticollis (Fairmaire, 1897). C–D. L. griseopubens (Pic, 1928). E–G. L. nigripennis (Pic, 1938). H–J. L. aurantiacus Hsiao & Okushima sp. nov. A. Ventrolateral view. B. Dorsolateral view. E, H. Ventral view. D, F, I. Lateral view. C, G, J. Dorsal view. Scale bars: 0.5 mm.

Fig. 5. Aedeagus. A–C. Lycocerus evangelium Hsiao & Okushima sp. nov. D–F. L. kintaroi Hsiao & Okushima sp. nov. A, D. Ventral view. B, E. Lateral view. C, F. Dorsal view. Scale bars: 0.5 mm.