Paracladiscus choui, Murakami, 2016

Murakami, Hiroyuki, 2016, Review of the generaDiplopherusa and Paracladiscus (Coleoptera: Cleridae: Tillinae) from Japan and Taiwan, with descriptions of two new species, Acta Entomologica Musei Nationalis Pragae 56 (2), pp. 725-741 : 737-738

Paracladiscus choui sp. nov.

( Figs 6–7 , 15–16 , 22–24 , 29, 35, 41 , 51–52, 57–58, 61)

Type materials. HOLOTYPE: J ‘[Taiwan] Dahanshan (Mt.) | Chunri Township | Pingtung County | [the locality name written in Chinese characters] | 8. VII, 2012 | H. Murakami leg.’ ( EUMJ) . PARATYPES: TAIWAN: HSINCHU COUNTY: 5 JJ, Yulao, Alt. ca. 1,589 m, Jianshih Township , Hsinchu County, 3.vii.2015, W. I. Chou leg. ( WCTT) ; 3 JJ, same data, but the date is 4. vii. ( WCTT) ; NANTOU COUNTY: 1 J, Songchuangang, Alt. ca. 2,500m, Renai Township , Nantou County, 25.vi.2014, W. I Chou leg. ( WCTT) ; PINGTUNG COUNTY: 1 J, same data as holotype ( TARI) . TAITUNG COUNTY: 2 ♀♀, Xiangyang, Alt. ca. 2,100 m, Haiduan Township , Taitung County, 1.vii.2012, J. Yamasako leg. ( EUMJ) ; 1 J, Yenping Forestroad, Yenping Township , Taitung County, 12.vii.2012, H. Murakami leg. ( EUMJ) ; 1 J, Dasyueshan, Alt. ca. 2,500m, Heping Township , Taichung County, 6.vii.2014, by light trap with mercury lamp, S. Sin Yan leg. ( SSCT) ; 1 J, Xiangyang, Alt. ca. 2,200 m, Haiduan Township , Taitung County, 25.vi.2015, W. I. Chou leg. ( WCTT) ; 1 J, Taimalishan, Alt. ca. 1,300 m, Taimali Township , Taichung County, 29.vi.2016, W. I. Chou leg. ( WCTT) .

Description. Male ( Fig. 6 ). Body uniformly black, covered with brownish pubescence.

Measurements (n = 3): EyW: 0.20–0.30 (0.25) mm; EyD: 0.50–0.62 (0.55) mm; BL: 4.45–5.91 (5.32) mm; PL: 1.10–1.47 (1.28) mm; PW: 0.71–1.01 (0.84) mm; EL: 3.35–4.43 (4.04) mm; EW: 1.00–1.32 (1.20) mm.

Head closely and densely covered with setigerous punctures; frons elevated towards lateral margins; EyD/EyW: 2.00–2.50 (2.19). Terminal palpomeres of maxillary palpi short digitiform. Those of labial palpi longitudinal triangular, as long as width of apical margin of terminal palpomeres ( Fig. 22 ). Antennae ( Fig. 15 ) longer than total length of head and pronotum combined; antennomere I swollen and bent; II compact; III–X biramous; ramus becoming progressively longer towards V; XI flattened, fusiform. Approximate length ratio of antennomeres (n = 1): 3.3: 0.9: 3.4: 4.1: 4.2: 4.2: 4.2: 4.2: 4.2: 4.1: 6.7. Relative length ratio of rami of antennomeres III–X (n = 1): 1.0: 1.6: 1.8: 1.9: 1.8: 1.6: 1.4: 1.1.

Pronotum widest before apex, constricted in basal 1/4; surface with large deep and densely arranged setigerous punctures; pronotal projections reaching to procoxal projection; PL/PW: 1.46–1.59 (1.54).

Elytra elongate, subparallel-sided, widest at humeri, covered with large deep punctation; rows of punctures reaching to apex; distance among punctures slightly larger than puncture diameter; interspaces with pubescence; EL/EW: 3.35–3.42 (3.38); EL/PL: 3.02–3.42 (3.16); EW/PW: 1.32–1.59 (1.44). Metendosternite ( Fig. 23 ) with extended furcal arms anterolaterally; furcal laminae distally extended; process anteriorly extending from base of furcal arms.

Unguis with basal denticles; pro and mesotibiae elongate, gently widened apically; metatibiae ( Fig. 24 ) elongate, gradually dilated towards basal half, thence slightly curved inwardly.

Pygidium ( Fig. 29 ) rounded posteriorly; pygidial struts stout, anteriorly extended. Sternite VIII ( Fig. 35 ) weakly pigmented in medial portion; apical margin emarginate in middle. Spicular fork ( Fig. 41 ) with intraspicular plate.

Aedeagus in fully extended condition (Figs 51–52) with finely spinose area between tegmen and phallus. Tegmen shorter than phallus; phallobase cylindrical without phallobasic struts, membranous in ventral view; phallobasic apodeme elongate, tapered posteriorly. Phallus divaricate in apical 1/5, dorsally with median orifice, and roundly pointed apex.

Female ( Fig. 7 ). Measurements (n = 2): EyW: 0.20–0.22 mm; EyD: 0.64–0.68 mm; BL: 5.73–5.93 mm; PL: 1.29–1.30 mm; PW: 0.89–0.95 mm; EL: 4.44–4.63 mm; EW: 1.27–1.30 mm. Similar to male, but EyD/EyW: 3.09–3.20; antennae ( Fig. 16 ) crenate, their length equal to 2/3 of length of male antennae; hind tibiae simply elongate. Approximate length ratio of antennomeres (n = 1): 2.1: 1.0: 1.6: 1.8: 1.8: 1.9: 1.6: 1.5: 1.5: 1.4: 1.9. Relative width ratio of antennomeres (n = 1): 1.4: 1.0: 1.1: 1.4: 1.5: 1.8: 1.8: 1.8: 1.6: 1.6: 1.5. PL/ PW: 1.37–1.45; EL/EW: 3.49–3.56; EL/PL: 3.43–3.56; EW/PW: 1.37–1.43. Pygidium ( Fig. 57 ) almost straight at apical margin; pygidial struts stout. Sternite VIII ( Fig. 58 ) rounded posteriorly.

Differential diagnosis. The new species can be distinguished from P. atricolor by antennomeres III–X biramous in males ( Fig. 15 ); females have antennae longer than combined lengths of head and pronotum; punctation of head and pronotum dense; elytral rows of punctures extending to apex; tibiae elongate in male.

Etymology. The species name is dedicated to Wen-I Chou, who kindly helped and cooperated during a collecting trip to Taiwan in 2012.

Distribution. Taiwan: Hsinchu Co., Nantou Co., Pingtung Co., and Taitung Co. ( Fig. 61 ).

Figures

Figs 6–9. Habitus of Paracladiscus spp. (6, 8 – male, holotype; 7, 9 – female). 6–7 – Paracladiscus choui sp. nov.; 8–9 – P. atricolor Miyatake, 1965. Scale bars: 2.0 mm.

Figs 10–18. Antennae (10–13, 15, 17 – male; 14, 16, 18 – female). 10 – Diplopherusa yonaguniensis sp. nov.; 11 – D. ahsini Yang & Yang, 2013; 12 – D. kitamurai Nakane, 1989; 13–14 – D. shibatai (Miyatake, 1965); 15–16 – Paracladiscus choui sp. nov.; 17–18 – P. atricolor Miyatake, 1965. Scale bars: 0.5 mm.

Figs 19–24. Labial palpi (19, 22), metendosternites (20, 23) and male hind tibiae (21, 24). 19–21 – Diplopherusa kitamurai Nakane, 1989; 22–24 – Paracladiscus choui sp.nov. Scale bars:0.25 mm (19–20, 22–23), 0.5 mm (21, 24).

Figs 25–42. Male pygidia (25–30), 8th sternites (31–36) and spicular forks (37–42). 25, 31, 37 – Diplopherusa yonaguniensis sp. nov.; 26, 32, 38 – D. ahsini Yang & Yang. 2013; 27, 33, 39 – D. kitamurai Nakane, 1989; 28, 34, 40 – D. shibatai (Miyatake, 1965); 29, 35, 41 – Paracladiscus choui sp. nov.; 30, 36, 42 – P. atricolor Miyatake, 1965. Scale bars: 0.25 mm (25–28, 30–34, 36–40, 42), 0.5 mm (29, 35, 41).

Figs 55–60. Female pygidia (55, 57, 59) and 8th sternites (56, 58, 60). 55–56 – Diplopherusa shibatai (Miyatake, 1965); 57–58 – Paracladiscus choui sp. nov.; 59–60 – P. atricolor Miyatake, 1965. Scale bars: 0.25 mm.

Fig. 61. Distribution map of Diplopherusa and Paracladiscus species in Japan and Taiwan.