Cladiscus hachijoensis, Murakami, 2020

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 : 486-489

Cladiscus hachijoensis sp. nov.

( Figs 6, 7, 10, 11 , 23, 24 , 32, 39, 95–106, 122, 123)

[Japanese name: Hachijo-hoso-kakkoumushi]

Cladiscus obeliscus (misidentification): UΕDΑ et. al. (1994).

Cladiscus sp.: KΑ WΑΒΑΤΑΚΕ (2009): 29 [faunistics, fig. 2].

Type series. HOLOΤYΡΕ: 1 ♁, ‘Sueyoshi/ Hachijôjima Is. | Tôkyô Met. | 7–Jul–1981 | S. Kusakabe leg.’ ( EUMJ). PΑRΑΤYΡΕ S: 1 ♀, ‘Sueyoshi/ Hachijôjima Is. | Tôkyô Met. | 7–Jul–1981 | S. Kusakabe leg.’ ( KSCJ); 1 ♀, ‘[SUESOSHI] | Is. Hachijyôjima | Tôkyô Met.| 8. VII.1983.| T. WAKEJIMA leg.’ ( KSCJ); 1 ♀, ‘ TÔKSÔ: JAPAN | NoboryôPass | Hachijyô Island | 23-25. VII. 2001 | Jirô Ogawa leg.’ ( EUMJ); 1 ♁, ‘(HACHIJÔ ISLAND) | Neighbourhood of | Hachijô-onsen Hotel | Kashitate, 4. VII. | 1991, S. Hisamatsu’ ( EUMJ); 1 ♁, ‘Mitsune-Noboriyu toge, | 5. VI. 1964, S. Hirashima & M. Shiga leg.’ ( KUMJ); 1 ♁, ‘HACHIJO | 5.VI.71 | T. Nakane’ ( HUMJ).

Description. Male ( Figs 6, 10 ). Head brownish black, sometimes brownish red; pronotum and elytra brownish red; antennae and legs brownish black.

Antennae ( Fig. 23 ) weakly serrate, longer than total length of head and pronotum combined; antennomere XI slightly longer than X.

Pronotum smooth at apex; postcoxal projections ( Fig. 39 ) long; prosternal process not extending contact point of postcoxal projections. Elytra with rows of deep, large, asetigerous punctures in basal 3/4; apical margins not indented. Mesoventrite with sparse setigerous punctures except for central portion. Metaventral anterior process short. Metendosternite ( Fig. 95 ) without furcal laminae; process short, extending anteriorly, bifurcated at apex; furcal arms almost straight, extending anterolaterally.

Protibiae ( Fig. 32 ) widening from basal half to apex. Tibial spur formula 0–0–0.

Apical margin of abdominal ventrite V emarginated broadly and slightly. Pygidium ( Fig. 96 ) rounded posteriorly; pygidial struts extended distally. Apical margin of ventrite VI ( Fig. 97 ) almost straight. Spicular fork ( Fig. 98 ) with intraspicular plate, which is 1/2 of spicular fork.

CM ( Fig 101–103 ) without fine spines, 1/3 as long as tegmen. Tegmen flattened, widest at apex. Phallus flattened, divaricated in apical 1/2, rounded at apex.

Female. Similar to male ( Fig. 7 ), but EyD/EyW 2.82– 3.23; antennae ( Fig. 24 ) almost as long as total length of head and pronotum combined; apical margin of abdominal ventrite V emarginated broadly and deeply.

Apical margin of pygidium ( Fig. 99 ) almost straight; pygidial struts extended anteriorly. Apical margin of ventrite VI ( Fig. 100 ) almost straight; apodeme about half of ventrite VI.

Spermatheca weakly sclerotized; Sc ( Fig. 122 ) annular. CPr ( Figs 104–106 ) distally trifurcate; central and ventrolateral processes large, equal in size; dorsolateral process relatively short.

Measurements and ratios. Male (n Y 2): BL: 5.19–5.91 mm; PL: 1.46–1.64 mm; PWA: 1.02–1.08 mm; PWM: 0.52–0.54 mm; PWB: 0.76–0.82 mm; EL: 3.55–4.45 mm; EW: 1.20–1.34 mm; EyD: 0.60–0.82 mm; EyW: 0.20–0.28 mm; EL/PL: 2.16–3.05; EW/PWA: 1.18–1.24; EW/PWM: 2.31–2.48; EW/PWB: 1.58–1.63; PWA/PWB: 1.32–1.34; PWA/PWM: 1.96–2.00; PWB/PWM: 1.46–1.52; EyD/ EyW: 2.14–4.10. Female (n Y 2): BL: 5.82–6.84 mm; PL: 1.46–1.84 mm; PWA: 1.02–1.30 mm; PWM: 0.44–0.60 mm; PWB: 0.72–0.86 mm; EL: 4.36–5.00 mm; EW: 1.12 mm; EyD: 0.62–0.84 mm; EyW: 0.22–0.26 mm; EL/PL: 2.72–2.99; EW/PWA: 0.86–1.10; EW/PWM: 1.87–2.55; EW/PWB: 1.30–1.56; PWA/PWB: 1.42–1.51; PWA/PWM: 2.17–2.32; PWB/PWM: 1.43–1.64; EyD/EyW: 2.82–3.23. Differential diagnosis. This species is similar to Cladiscus fulvescens (Chevrolat, 1874) , but distinguished by blackish antennae and legs.

Etymology. The specific name is derived from the type locality, Hachijo-jima, Tokyo Prefecture, Japan; adjective. Distribution ( Fig. 126 ). Japan: Tokyo: Izu Islands: Hachijo-jima.

Remarks. This species was recorded from Hachijo-jima as Cladiscus obeliscus (UΕDΑ et. al. 1994) because of misidentification. Subsequently, it was listed as Cladiscus sp. (KΑ WΑΒΑΤΑΚΕ 2009). In this study, this species is newly described.

Figures

Fig 126. Distribution map of the species of Cladiscus from Japan and Taiwan.

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 27–39. Male protibiae (27–33) and prothorax in ventral view (34–39). 27, 34 – Cladiscus obeliscus Lewis, 1892; 28, 35 – C. weyersi Kraatz, 1899; 29, 36 – C. sauteri Schenkling, 1912; 30, 37 – C. terminalis Schenkling, 1912; 31, 38 – C. pallidicornis Corporaal & van der Wiel, 1949; 32, 39 – C. hachijoensis sp. nov.; 33 – C. liaoi sp. nov. Scale bars: 0.5 mm.

Figs 95–106. Metendosternite, terminal parts and genitalia of Cladiscus hachijoensis sp. nov. (95–98, 101–103, male; 99, 100, 104–106, female). 95 – metendosternite; 96, 99 – pygidium; 97, 100 – ventrite VI; 98 – spicular fork; 101–103 – male genitalia in lateral (101), ventral (102), and dorsal (103) views; 104–106 – apices of ovipositor in lateral (104), ventral (105), and dorsal (106) 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.