Platypalpus flavipilosus, Wang & Wang & Yang & Lin, 2024

Wang, Yuanyuan, Wang, Ning, Yang, Ding & Lin, Kejian, 2024, The genus Platypalpus Macquart (Diptera, Hybotidae, Tachydromiinae) from Inner Mongolia, China, with the description of four new species, ZooKeys 1198, pp. 87-99 : 87

Platypalpus flavipilosus sp. nov.

Figs 2 , 6-9

Diagnosis.

Thorax dark yellow, somewhat blackish dorsally. Antenna yellowish; first flagellomere oval, short, slightly wider than pedicel, 1.3 times longer than wide. Mid tibia with 1 short finger-like apical spur.

Description.

Male (Fig.. 2). Body length 2.6-2.7 mm, wing length 2.7-2.8 mm.

Head black, with pale gray pollen. Eyes narrowly separated on face; frons distinctly wider than face. Hairs on head yellowish, bristles black or brownish yellow. Ocellar tubercle with 2 oc and 2 short posterior hairs. 2 pairs of vt. Antenna (Fig. 6 ) yellowish; first flagellomere oval, short, 1.3 times longer than wide, slightly wider than pedicel, with indistinct blackish pubescence; stylus blackish, 2.9-3.0 times longer than first flagellomere, with short blackish pubescence. Proboscis yellowish, 0.6-0.7 times as long as head height. Palpus oval, longer than wide, yellowish, with yellow hairs and bristles.

Thorax dark yellow with thin pale gray pollen, blackish dorsally, humerus dark yellow, postalar callus brownish yellow; sutures of mesopleuron somewhat blackish. Hairs and bristles on thorax yellow, bristles strong; mesonotum with dense hairs, acr and dc multiseriate and not separated; 1 h, 2 npl (anterior bristle short), 1 psa, 1 presc; two pairs of sc (lateral pair short, 1/3 as long as apical pair).

Legs yellow, but tarsomere V brown apically. Hairs on legs yellowish. Fore femur slightly thickened, 1.3-1.4 times wider than hind femur; mid femur distinctly thickened, 2.3-2.4 times wider than hind femur. Mid femur with 2 rows of short, black, spine-like, ventral bristles (few basal bristles brownish yellow, pv slightly longer than av), without row of outer pv. Mid tibia with 1 row of short black ventral bristles; apical spur short, finger-like (almost as long as tibia width). Wing hyaline, veins brownish; R4+5 and M nearly parallel, r-m and m-m contiguous. Squama yellow with pale hairs. Halter yellowish.

Abdomen partly dark yellow, with pale gray pollen, sternites I-VI and hypopygium dark brown. Hairs and bristles on abdomen yellowish except those on hypopygium blackish. Hypopygium (Figs 7-9 ): left epandrial lamella short and small, apically widely obtuse. Right epandrial lamella extremely wide and large; right surstylus (Fig. 8 ) short and small, pointed at tip. Left cercus (Fig. 7 ) strongly dilated at base, narrowed towards apex, pointed at tip; right cercus almost as long as left cercus, narrow at tip, slightly curved inwards.

Female. Body length 3.0-3.5 mm, wing length 2.9-3.0 mm. Similar to male, but abdomen dark brown except sternites I-IV or I-V dark yellow.

Type material.

Holotype: male, China, Inner Mongolia, Erdos, Dongsheng, 2006.VIII.7, Maoling Sheng (CAU). Paratypes: 1 male, 6 females, same data as holotype (CAU).

Etymology.

The specific name refers to the yellow body hairs.

Remarks.

The new species belongs to the P. longicornis group. It is somewhat similar to P. baotianmanensis Yang, An et Gao from Henan of China, but can be easily distinguished from the latter by the wholly blackish mesonotum and postnotum. In P. baotianmanensis , the mesonotum is yellow with a wide black middle spot, and the postnotum is brownish-yellow laterally ( Grootaert and Shamshev 2006).

Figures

Figures 2 - 5. Habitus, lateral view 2 P. flavipilosus sp. nov., male (dissected) 3 P. longus sp. nov., male (dissected) 4 P. shengi sp. nov., male (dissected) 5 P. shuimogouanus sp. nov., male (dissected). Scale bars: 1 mm.

Figures 6 - 9. Platypalpus flavipilosus sp. nov., male 6 antenna 7 genitalia, dorsal view 8 right surstylus, lateral view 9 left epandrial lamella, lateral view. Scale bars: 0.2 mm.