Cladiscus, Chevrolat, 1843

Murakami, Hiroyuki, 2020, Review of the genus Cladiscus (Coleoptera: Cleridae) from Japan and Taiwan, with descriptions of two new species, Acta Entomologica Musei Nationalis Pragae 60 (2), pp. 475-492 : 489-490

Key to the species of Cladiscus from Japan and Taiwan

1 Elytra largely yellowish red ( Figs 4, 6–9 ). .................... 2

– Elytra largely black or brownish black ( Figs 1–3, 5 ). .... ........................................................................................ 4

2 Eyes small (EyD/EyW 2.14‒4.10 in male, 2.82–3.23 in female); elytra relatively wide (EL/EW 2.65–3.71 in male, 3.90–4.46 in female). ... C. hachijoensis sp. nov.

– Eyes large in male, small in female (EyD/EyW 0.56– 0.68 in male, 2.18–2.20 in female); elytra relatively long (EL/EW 4.29–4.38 in male, 4.96‒4.99 in female). ...... 3

3 Elytra mostly yellowish-red, black at apex ( Fig. 4 ). ...... ................................... C. terminalis Schenkling, 1912

– Elytra entirely yellowish-red ( Figs 8, 9 ). ......................... .............................................................. C. liaoi sp. nov.

4 Elytral punctures not extending to apical half ( Fig. 2 ). ............................................... C. weyersi Kraatz, 1899

– Elytral punctures extending to apical half ( Figs 1, 3, 5 ). ...................................................................................... 5

5 Male antennae flabellate ( Fig. 17 ); female antennae serrate, antennomeres IV to X widely triangular ( Fig. 18 ). ..................................... C. sauteri Schenkling, 1912

– Male and female antennae weakly serrate. .................. 6

6 Head black; elytra entirely blackish ( Fig. 1 ); EL/PL 4.36–5.15 (4.87) in male, 4.02–4.45 (4.28) in female; tegmen and phallus symmetrical ( Figs 46–48 ); base of MO with a flattened sclerite plate ( Fig. 120 ). ................. ............................................... C. obeliscus Lewis, 1892

– Head brownish red; elytra reddish near base ( Fig. 5 ); EL/PL 2.72–3.14 (2.94) in male, 2.76–2.94 (2.84) in female; tegmen and phallus not symmetrical ( Figs 89–91 ); base of MO with a sagittate sclerite ( Fig. 121 ). ..... C. pallidicornis Corporaal & van der Wiel, 1949

Figures

Figs 1–13. Habitus and head of Cladiscus spp. (1–5, 6, 8, 10, 12, male; 7, 9, 11, 13, female). 1 – Cladiscus obeliscus Lewis, 1892; 2 – C. weyersi Kraatz, 1899; 3 – C. sauteri Schenkling, 1912; 4 – C. terminalis Schenkling, 1912; 5 – C. pallidicornis Corporaal & van der Wiel, 1949; 6, 7, 10, 11 – C. hachijoensis sp. nov. (6, 10, holotype; 7, 11, paratype); 8, 9, 12, 13 – C. liaoi sp. nov. (8, 12, holotype; 9, 13, paratype). Scale bars: 2.0 mm.

Figs 14–26. Antennae (14, 16, 17, 19, 21, 23, 25 – male; 15, 18, 20, 22, 24, 26 – female). 14, 15 – Cladiscus obeliscus Lewis, 1892; 16 – C. weyersi Kraatz, 1899; 17, 18 – C. sauteri Schenkling, 1912; 19, 20 – C. terminalis Schenkling, 1912; 21, 22 – C. pallidicornis Corporaal & van der Wiel, 1949; 23, 24 – C. hachijoensis sp. nov.; 25, 26 – C. liaoi sp. nov.

Figs 40–51. Metendosternite, terminal parts and genitalia of Cladiscus obeliscus Lewis, 1892 (40–43, 46–48, male; 44, 45, 49–51, female). 40 – metendosternite; 41, 44 – pygidium; 42, 45 – ventrite VI; 43 – spicular fork; 46–48 – male genitalia in lateral (46), ventral (47), and dorsal (48) views; 49–51 – apices of ovipositor in lateral (49), ventral (50), and dorsal (51) views.

Figs 119–122. Female reproductive organs (119) and sclerites (120–122). 119, 120 – Cladiscus obeliscus Lewis, 1892; 121 – C. pallidicornis Corporaal & van der Wiel, 1949; 122 – C. hachijoensis sp. nov.

Figs 83–94. Metendosternite, terminal parts and genitalia of Cladiscus pallidicornis Corporaal & van der Wiel, 1949 (83–86, 89–91, male; 87, 88, 92–94, female). 83 – metendosternite; 84, 87 – pygidium; 85, 88 – ventrite VI; 86 – spicular fork; 89–91 – male genitalia in lateral (89), ventral (90), and dorsal (91) views; 92–94 – apices of ovipositor in lateral (92), ventral (93), and dorsal (94) views.