Xenoplatyura lata Cao et Xu

Cao, Jian, Zhou, Zuji, Xu, Huachao & Wu, Hong, 2007, First record of the genus Xenoplatyura Malloch, 1928 from China, with descriptions of three new species (Diptera: Keroplatidae), Zootaxa 1465, pp. 31-38 : 34-36

Xenoplatyura lata Cao et Xu , n. sp.

( Figs. 2 , 8–13 )

Diagnosis. This species is similar to X. lunifrons Senior-White, 1922 in having indistinct brown patches behind the tips of R5 and CuA2 and all veins brown. However, it is easily distinguished by the shapes of tergite IX, cercus, gonocoxites and gonostyli.

Description. MALE. Lengths: Body: 5.4 mm; wing: 3.9 mm.

Head. Vertex and occiput obscurely yellow with fairly dense small black recumbent hairs. Frons obscurely yellow. Antennae: scape and pedicel cup-shaped, yellow. Flagellum: yellow. Face yellow. Palpi: segments I–II obscurely yellow, segments III–IV yellow; segment IV long and slender. Labellum yellow, fleshy.

Thorax. Mesonotum obscurely yellow with long dark setae on side margins. Scutellum obscurely yellow with long setae on posterior margin. Prothorax yellow with some long setae. Anepisternum, katepisternum, laterotergite and mediotergite obscurely yellow, bare. Halter yellow.

Legs. Yellow. Fore coxa, apex of mid and hind coxae with long recumbent black hairs. Femora with recumbent black hairs. Fore and mid tibiae with setulae in rows on apical half, hind tibia with setulae in rows on apical third. All tibiae with some setae. Fore tibia without comb, mid tibia with posterior comb and hind tibia with anterior and posterior combs. Tibial spurs dark brown. Fore and mid basitarsi 0.9x lengths of their respective tibiae, hind basitarsus 0.7x length of hind tibia. Claws minute.

Wing ( Fig. 2 ). Hyaline with indistinct brown patches behind the tips of R5 and CuA2. Veins brown. Costa almost reaching one-third distance from vein R5 to vein M1+2; Sc ends slightly beyond base of Rs; Sc-R situated at level of basal 0.2–0.3 between h and tip of Sc. Distance between tips of R1 and R4 1.4–1.6 times as long as R4. Ratio of radiomedial fusion / petiole of M: 0.4–0.5. Petiole of M one-fourth as long as length of M1+2. Veins M2 and CuA1 not reaching wing margin, vein A reaches wing margin.

Abdomen. Tergites I–VI yellow, tergites VII–VIII yellowish brown; all of the tergites with dense recumbent black hairs. Sternum patterned as on tergites.

Hypopygium ( Figs. 8–11 ). Tergite IX ( Fig. 10 ) yellowish brown and broader basal half; cercus visible in dorsal view. Genitalia as in Figs. 8, 9, 11 .

FEMALE. As in male, but abdomen all yellow. Female terminalia as in Figs. 12, 13 .

Types. Holotype ɗ (ZJFC 981687) and paratype ɗ & from: China: Zhejiang Province: Tianmushan National Natural Reserve, 3 August 1998, Mingshui Zhao, Malaise Trap.

Etymology. The species epithet derives from the Latin latus = broad, referring to the breadth of tergite IX.

Figures

FIGURES 1 – 3. Xenoplatyura wings. 1. X. sichuanensis, n. sp. 2. X. lata, n. sp. 3. X. bifida, n. sp.

FIGURES 8 – 13. X. lata, n. sp. 8. gonocoxites and gonostyli, dorsal view. 9. gonocoxites and gonostyli, lateral view. 10. tergite IX and cercus, dorsal view. 11. aedeagus, ventral view. 12. female terminalia, ventral view. 13. female terminalia, lateral view. Scale bar = 0.1 mm.