Cephalispa kudoi, Yoshizawa, Satoshi & Tachi, Takuji, 2016

Yoshizawa, Satoshi & Tachi, Takuji, 2016, Taxonomic study of the genus Cephalispa Malloch of Japan (Diptera: Muscidae), Zootaxa 4132 (4), pp. 540-550 : 541-543

Cephalispa kudoi sp. nov.

( Figs 1‒6 , 25 , 28 , 30 )

Description. Male and female.

Head. First flagellomere cream yellow in basal 1/3 and yellowish brown in apical 2/3; palpus cream yellow; labella yellow. Gena 0.09‒0.11 of eye height.

Thorax. Anterior and posterior spiracles yellow. Two‒three postsutural intra-alar setae.

Abdomen. Whitish yellow in ground color with blackish brown pruinosity medially. Male 5th sternite ( Figs 1‒2 ) nearly rectangular in ventral view, round and curved ventrally at posterior apex in lateral view with large ridge internally.

Male terminalia ( Figs 3‒6 ). Surstylus nearly straight and pointed apically with some setae on entire length in lateral view, slightly narrow at middle in dorsal view; bacilliform sclerite strongly reduced; hypandrium nearly triangular in lateral view; postgonite broad, curved ventrally at middle and pointed at apex; phallus nearly straight, strongly notched at middle, hook-like apically in lateral view, asymmetric at apical half with membranous area in dorsal view.

Female terminalia ( Fig. 25 ). Seventh sternite strongly reduced.

Body length. 5.5‒7.0 mm (n = 53).

Type material examined. Holotype: Male, Onoaida, Yakushima town, Yakushima Is., Kumage-gun, Kagoshima pref., Japan [N 30°14’39” / E 130°33’30”], 9. III. 2013, S. Yoshizawa ( BLKU). Paratypes: JAPAN: Five males and 27 females, same data as holotype ( BLKU); 1 male and 7 females, same locality and collector as holotype, 7. III. 2013 ( BLKU); 1 female, Tenokuchi, Yakushima town, Yakushima Is., Kumage-gun, Kagoshima pref. [N 30°17’29” / E 130°37’34”], 4. VI. 2015, S. Yoshizawa ( BLKU); 2 males and 2 females, Mt. Higo, Sumiyo town, Amami city, Amami-ōshima Is., Kagoshima pref. [N 28°12’47” / E 129°22’49”], 4. VII. 2013, S. Yoshizawa ( BLKU); 1 female, Mt. Yonaha, Azaokuma, Kunigami Vil., Kunigami-gun, Okinawa Is., Okinawa pref., 8. IV. 1953, T. Shiraki ( NIAES); 1 male, Inoda, Ishigaki city, Ishigakijima Is., Okinawa pref., 27. II. 1953, T. Shiraki ( NIAES); 1 male and 2 females, Siramizu, Ishigaki city, Ishigakijima Is., Okinawa pref. [N 24°25’19” / E 124°9’50”], 31. V. 2012, S. Yoshizawa ( BLKU); 1 male and 1 female, Urauchi river, Urauchi, Taketomi town, Iriomotejima Is., Yaeyama-gun, Okinawa pref. [N 24°24’15” / E 123°46’56”], 22. VI. 2011, S. Yoshizawa ( BLKU); 1 female, Urauchi, Taketomi town, Iriomotejima Is., Yaeyama-gun, Okinawa pref. [N 24°24’10” / E 123°46’42”], 24. V. 2012, S. Yoshizawa ( BLKU).

Distribution. Japan (Yakushima Is., Amami-Oshima Is., Okinawa Is., Ishigakijima Is., Iriomotejima Is.).

Bionomics. This is a forest-inhabiting species.

Etymology. The specific epithet is taken from Mr. Yuta Kudo, who supported us for material collecting in Yakushima Is.

Remarks. This species is easily distinguished from the other Japanese species by having the asymmetric phallus and greatly reduced female abdominal 7th sternite ( Figs 6 , 25 ). This species is thought to be close to Chinese species, C. curtrata Cui & Xue, 1995 and C. breviabdominis Cui & Xue, 1995 by having the asymmetric phallus ( Cui et al., 1995). It is distinguishable from them by the narrowed surstylus at middle in dorsal view ( Fig. 4 ).

Figures

FIGURE 30. Distribution map for Cephalispa species in Japan: C. kudoi sp. nov. (black circles); C. okinawaensis sp. nov. (white circle); C. triquetra sp. nov. (black squares); and C. xanthogaster (Shinonaga, 2003) comb. nov. (white squares).

FIGURES 1 – 6. Male 5 th sternite and terminalia of Cephalispa kudoi sp. nov.: 1. Male 5 th sternite in ventral view (setae omitted on the left side). 2. Same in lateral view (setae omitted). 3. Epandrium, surstylus and cerci in lateral view. 4. Same in dorsal view (setae omitted on the left side). 5. Hypandrium, postgonite and phallus in lateral view. 6. Distiphallus in dorsal view. (Abbreviations: cerc: cerci; epand: epandrium; hypand: hypandrium; pgt: postgonite; ph: phallus; sur: surstylus). (Scale bars = 0.2 mm).

FIGURES 25 ‒ 27. Female terminalia of Cephalispa species in lateral view: 25. C. kudoi sp. nov. 26. C. okinawaensis sp. nov. 27. C. xanthogaster (Shinonaga, 2003) comb. nov. (Abbreviations: epi: epiproct; S 5: female 5 th sternite; S 6: female 6 th sternite; T 6: female 6 th tergite; T 7: female 7 th tergite; T 8: female 8 th tergite). (Scale bars = 0.2 mm).

FIGURES 28 ‒ 29. Lateral view of male adults of Cephalispa species: 28. C. kudoi sp. nov. 29. C. okinawaensis sp. nov. (Scale bar = 2 mm).