Paracladiscus atricolor Miyatake, 1965

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 : 739

Paracladiscus atricolor Miyatake, 1965

( Figs 8–9 , 17–18 , 30, 36, 42 , 53–54, 59–60, 61)

Paracladiscus atricolor Miyatake, 1965: 20 (original description, incl. fig. 1A–B, pl. 3B). MIYATAKE (1985): 152 (noted, incl. fig. 21, pl. 24); NAKAMURA (1986): 40 (faunistics).

Type locality. Japan, Kagoshima Prefecture, Amami Islands, Naze.

Type material examined. HOLOTYPE: J, ‘ HOLOTYPUS [red label] || NAZE | AMAMI IS.| 12. VI.1960 | K.Yamada [leg.] || 8–23 [orange label] || Paracladiscus | articolor | M. Miyatake [des.] [handwritten label]’ ( EUMJ, Type No. 477). PARATYPE: 1 ♀, ‘TSUNAGU | AMAMI. Is | 15. VII. 1962 | H. Yokoyama [leg.] || Paracladiscus | atricolor | M. Miyatake [des.] || PARAYPE [yellow label]’ ( OMNH).

Additional material examined. JAPAN: KAGOSHIMA PREFECTURE: Amami Islands: Amami-Ôshima, Chûô-rindô , 27–29. vi. 1987, 1 J, K. Shimizu leg. ( EUMJ) ; Amami-Ôshima, Hatsuno , 26.vi.1971, 1 J, T. Mizunuma leg. ( EUMJ), 26.vi.1970, 1 J, 24.vi.1970, 1 J, T. Kobayashi leg. ( EUMJ) ; Amami-Ôshima, Mt. Yui-dake , 18.vi.1982, 1 ♀, T. Kobayashi leg. ( KSTJ) .

Supplementary description. Male ( Fig. 8 ). For full description see MIYATAKE (1965). Measurements. Male (n = 4): EyW: 0.20–0.26 (0.24) mm; EyD: 0.48–0.58 (0.53) mm; BL: 3.17–4.83 (4.13) mm; PL: 0.87–1.33 (1.12) mm; PW: 0.55–0.90 (0.76) mm; EL: 2.30–3.50 (3.01) mm; EW: 0.73–1.15 (1.00) mm. Approximate length ratio of antennomeres (n = 1): 3.1: 1.0: 3.8: 3.8: 4.4: 4.2: 4.2: 4.0: 4.6: 4.0: 6.9. Relative length ratio of rami of antennomeres III–X (n = 1): 1.0: 2.1: 2.4: 2.5: 2.5: 2.4: 2.2: 1.9. EyD/EyW: 2.00–2.40 (2.25); PL/PW: 1.40–1.58 (1.47); EL/EW: 2.78–3.14 (3.02); EL/PL: 2.55–2.98 (2.70); EW/PW: 1.28–1.33 (1.32). Metendosternite with extended furcal arms anterolaterally; furcal laminae distally extended; process extending anteriorly from base of furcal arms. Unguis with basal denticles; pro- and mesotibiae stout, gently widened apically; metatibiae stout, dilated towards basal half, thence slightly curved inwardly.

Pygidium ( Fig. 30 ) broadly rounded posteriorly; pygidial struts short, stout. Sternite VIII ( Fig. 36 ) weakly pigmented in medial portion; apical margin emarginate in middle. Spicular fork ( Fig. 42 ) without lateral plates.

Connecting membrane between tegmen and phallus in fully extended condition (Figs 53–54) vested with fine spines; tegmen shorter than phallus; phallobase cylindrical without phallobasic struts, membranous in ventral view; phallobasic apodeme elongate, rounded at apex; phallus divaricate in apical 1/6, dorsally with median orifice, roundly pointed at apex.

Female ( Fig. 9 ). Measurements (n = 1): EyW: 0.16 mm; EyD: 0.64 mm; BL: 4.02 mm; PL: 1.21 mm; PW: 0.91 mm; EL: 2.81 mm; EW: 1.16 mm.

Similar to male, but EyD/EyW: 4.00; antennae crenate, about half as long as in males ( Fig. 18 ); pronotum rounded on lateral sides; hind tibiae not swollen. Approximate length ratio of antennomeres (n = 1): 2.0: 0.9: 1.6: 1.3: 1.3: 1.3: 1.3: 1.3: 1.4: 1.4: 2.3. Relative width ratio of antennomeres (n = 1): 1.8: 1.5: 1.0: 1.3: 1.8: 2.0: 2.0: 2.0: 2.0: 1.8: 1.8. PL/PW: 1.33; EL/EW: 2.42; EL/PL: 2.32; EW/PW: 1.28. Pygidium ( Fig. 59 ) rounded posteriorly; pygidial struts stout. Sternite VIII ( Fig. 60 ) rounded posteriorly.

Differential diagnosis. Paracladiscus atricolor can be distinguished from P. choui sp. nov. by antennomeres VII–X uniramous in males ( Fig. 17 ); females with antennae shorter than total length of head and pronotum combined; punctation of head and pronotum sparse; elytral striae not reaching to apex; tibiae stout in male.

Distribution. Japan: Kagoshima Prefecture:Amami-Ôshima, Okinawa Prefecture: Okinawajima ( MIYATAKE 1985, NAKAMURA 1986) ( 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 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.