Cladiscus liaoi, 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 : 489

Cladiscus liaoi sp. nov.

( Figs 8, 9, 12, 13 , 25, 26 , 33, 107–118, 123)

Type material. HOLOΤYΡΕ: 1 ♁, ‘[Taiwan] Dahanshan (Mt.). | Alt. ca. 1,200 m, Chunrih | Township, Pingtung County | DZAEḆĦHṞ†Oiffi | 28. V. 2015, W. C. Liao leg.’ ( EUMJ). PΑRΑΤYΡΕ: 1 ♀, ‘FORMOSA | TAIWAN | 1968.....1971’, unknown collector. ( EUMJ).

Description. Male ( Figs 8, 12 ). Head, pronotum, elytra yellowish brown; antennae and legs brownish black.

Antennae ( Fig. 25 ) longer than total length of head and pronotum combined, antennomeres III to X acutely serrate; XI fusiform, twice as long as X.

Pronotum smooth at apex; postcoxal projections short; prosternal process long, completely separating postcoxal projections. Elytra with rows of deep, large, asetigerous punctures in basal 5/6; apical margins not indented. Mesoventrite with evenly and densely arranged setigerous punctures. Metaventral anterior process tapered and as wide as mesoventral posterior process. Metendosternite ( Fig. 107 ) with short furcal laminae; process extending anteriorly, tapered; furcal arms almost straight, extending anterolaterally.

Protibiae ( Fig. 33 ) gently widening from base to apex., weakly curved. Tibial spur formula 0–0–0.

Apical margin of abdominal ventrite V emarginated broadly. Apical margin of pygidium ( Fig. 108 ) rounded posteriorly; struts short. Apical margin of ventrite VI ( Fig. 109 ) weakly emarginated. Spicular fork ( Fig. 110 ) with intraspicular plate, which is 1/3 of spicular fork.

CM ( Figs 113–115 ) bearing fine spines. Tegmen shorter than phallus; phallobase incised dorsally; phallobasic struts reaching phallobasic apodeme, which is 3/4 as long as tegmen. Phallus flattened, divaricated in apical 1/3, rounded at apex.

Female. Similar to male ( Fig. 9 ), but EyD/EyW 2.30; antennae ( Fig. 26 ) weakly serrate; elytra pointed posteriorly at apex; central portion of metaventrite with pair of bundles of elongate setae-like trichobothria; apical margin of abdominal ventrite V truncated broadly and deeply in middle.

Pygidium ( Fig. 111 ) rounded posteriorly, with struts short. Ventrite VI ( Fig. 112 ) rounded posteriorly, with apodeme 2/3 as long as ventrite VI.

Spermatheca membranous; Sc lacking. CPr ( Figs 116–118 ) distally trifurcate; central process large; dorsolateral and ventrolateral processes relatively short.

Measurements and ratios. Male (n Y 1): BL: 10.18 mm; PL: 2.18 mm; PWA: 1.28 mm; PWM: 0.48 mm; PWB: 1.03 mm; EL: 8.00 mm; EW: 1.83 mm; EyD: 0.35 mm; EyW: 0.63 mm; EL/PL: 3.68; EW/PWA: 1.43; EW/PWM: 3.84; EW/PWB: 1.78; PWA/PWB: 1.24; PWA/PWM: 2.68; PWB/PWM: 2.16; EyD/EyW: 0.56. Female (n Y 1): BL: 13.4 mm; PL: 2.18 mm; PWA: 1.28 mm; PWM: 0.98 mm; PWB: 1.43 mm; EL: 10.9 mm; EW: 2.20 mm; EyD: 1.15 mm; EyW: 0.50 mm; EL/PL: 4.36; EW/PWA: 1.21; EW/ PWM: 2.26; EW/PWB: 1.54; PWA/PWB: 1.28; PWA/ PWM: 1.87; PWB/PWM: 1.46; EyD/EyW: 2.30.

Differential diagnosis. This new species is similar to C. terminalis , but it is distinguishable by the following characters: EyD/EyW 0.56 in male, 2.30 in female; PWA/ PWB 1.24–1.28; female antennae ( Fig. 26 ) as long as male ( Fig. 25 ); whole elytra yellowish brown, in female pointed at apex.

Etymology. The species name is dedicated to Mr. Wen -Chuan Liao, the collector of the holotype; noun in genitive case standing in apposition.

Distribution ( Fig. 126 ). Taiwan.

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 107–118. Metendosternite, terminal parts and genitalia of Cladiscus liaoi sp. nov. (107–110, 113–115, male; 111, 112, 116–118, female). 107 – metendosternite; 108, 111 – pygidium; 109, 112 – ventrite VI; 110 – spicular fork; 113–115 – male genitalia in lateral (113), ventral (114), and dorsal (115) views; 116–118 – apices of ovipositor in lateral (116), ventral (117), and dorsal (118) views.

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.