Cephalispa xanthogaster ( Shinonaga, 2003 ) Shinonaga, 2003

Yoshizawa, Satoshi & Tachi, Takuji, 2016, Taxonomic study of the genus Cephalispa Malloch of Japan (Diptera: Muscidae), Zootaxa 4132 (4), pp. 540-550 : 546-549

Cephalispa xanthogaster ( Shinonaga, 2003) comb. nov.

( Figs 19‒24 , 27 , 30 )

Caricea xanthogaster Shinonaga, 2003: 281 . Holotype male (NSMT, examined), Lake Yamanaka, Yamanakako Vil., Minamitsuru-gun, Yamanashi pref., Japan, 20. Oct. 1970, S. Shinonaga.

Lispocephala xanthogaster ( Shinonaga, 2003) : Shinonaga (2014): 804.

Redescription. Male and female.

Head. Face, parafacial, gena, vertex and occiput black with gray pruinosity; fronto-orbital plate black with yellowish gray pruinosity; frontal vitta, scape, pedicel, prementum and labella cream yellow. First flagellomere and palpus cream. Vertex approximately 0.2 times as wide as head width; gena 0.06‒0.07 of eye height; ocellar triangle not reaching lunula; 2 frontal setae; 2 reclinate orbital setae; several setulae present on fronto-orbital plate; ocellar seta fine; compound eye bare. Antenna with first flagellomere 1.7‒2.0 times as long as pedicel; arista plumose.

Thorax. Dorsum black in ground color with yellowish gray pruinosity; postpronotum and pleura black in ground color with cream yellow pruinosity; anterior and posterior spiracles cream. Two postpronotal setae; acrostichal seta fine; 2 presutural and 3 postsutural dorsocentral setae; 1 presutural and 1 postsutural intra-alar setae; 0 presutural and 1 postsutural supra-alar setae; 2 notopleural setae; 2 postalar setae; basal scutellar seta as long as apical one; 2‒3 proepisternal setae; 1‒2 proepimeral setae; 5 anepisternal setae; 3 katepisternal setae, forming equilateral triangle; anepimeron, katepimeron, meron, katatergite and anatergite bare; prosternum bare.

Wing. Brownish hyaline; tegula, basicosta and all veins brown; upper and lower calypters brownish cream; halter cream yellow. Vein M not bending anteriorly at apical part; distance of M between crossveins r-m and dm-cu narrower than that between crossvein dm-cu and wing margin; crossvein dm-cu straight, slightly shorter than ultimate section of vein CuA1.

Legs. Coxae, trochanters, femora, tibiae and tarsi cream yellow; pulvilli and claws brown. Fore tibia with 2 preapical dorsal and 2 apical ventral setae; mid tibia with 2 posterodorsal, 2 preapical dorsal and 3 apical ventral setae; hind tibia with 2 anterodorsal, 2 preapical dorsal and 2 apical ventral setae.

Abdomen. Cream yellow in ground color with gray pruinosity medially; syntergite 1+2 with 0‒2 black spots; 3rd to 5th tergites with 2 black spots. Fifth tergite with several discal and marginal setae; male 5th sternite ( Figs 19‒20 ) broad and bifurcated posteriorly in ventral view, round and curved dorsally at posterior apex in lateral view.

Male terminalia ( Figs 21‒24 ). Sixth tergite strongly reduced; 6th sternite slender and symmetric; epandrium semicircular with many setae in dorsal view; surstylus fused with epandrium at base, curved dorsally at apical 1/ 5 in lateral view, slightly curved inward at middle with strong setae apically in dorsal view; bacilliform sclerite slender in lateral view; cerci slender with some setae in dorsal view; hypandrial arms fused and nearly semicircular in lateral view; pregonite strongly reduced; postgonite bifurcated at middle, ventral part nearly triangular, dorsal part nearly straight and truncated at apex; phallus long, curved ventrally at middle with large membranous areas laterally and apically in lateral view, round apically in dorsal view.

Female terminalia ( Fig. 27 ). Sixth to eighth tergites with several setae on posterior margin; 6th tergite narrowed at middle; 8th sternite strongly reduced.

Body length. 4.8‒6.3 mm (n = 5).

Type material examined. Holotype: Male, Lake Yamanaka, Yamanakako Vil., Minami-tsuru-gun, Yamanashi pref., Japan, 20. Oct. 1970, S. Shinonaga ( NSMT). Paratype: JAPAN: One female, Ueda city, Nagano pref., 23. IX. 1974, S. Shinonaga (EUM).

Other material examined. JAPAN: One female, Yumoto, Nasushiobara city, Tochigi pref., 7. IX. 1999 ( BLKU); 1 female, Gassan, Tachikawa town, Higashi-tagawa-gun, Yamagata pref., 12. VIII. 1996 ( FFPRI); 1 female, Hirabuse, Kawauchi Vil., Futaba-gun, Fukushima pref., 24. IX. 2001 ( FFPRI); 1 female, Mt. Sefuri, Fukuoka city, Fukuoka pref., 9. VII. 2000 ( BLKU); 1 male, Shinokawa, Amami city, Amami-ōshima Is., Kagoshima pref., 11. V. 1953 ( NIAES).

Distribution. Japan (Honshu, Kyushu, Amami-ōshima Is.).

Bionomics. Unknown.

Remarks. This species was originally described as a species of Caricea Robineau-Desvoidy by Shinonaga (2003) and is placed in Lispocephala at the present ( Shinonaga, 2014). However, we transfer this species to Cephalispa by having the greatly reduced ocellar seta.

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 19 – 24. Male 5 th sternite and terminalia of Cephalispa xanthogaster (Shinonaga, 2003) comb. nov.: 19. Male 5 th sternite in ventral view (setae omitted on the left side). 20. Same in lateral view (setae omitted). 21. Epandrium, surstylus and cerci in lateral view. 22. Same in dorsal view (setae omitted on the left side). 23. Hypandrium, postgonite and phallus in lateral view. 24. Distiphallus in dorsal view. (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).