Megaselia svendi, Henry & Bøggild, 2021

Henry, R. & Bøggild, Esben, 2021, Nineteen new species of Megaselia Rondani (Diptera, Phoridae) from Denmark, Zootaxa 4975 (2), pp. 306-342 : 334

Megaselia svendi sp. n.

( Figs 213–224 )

Diagnosis. In the key of Lundbeck (1922) for Group VI it runs to couplet 22, but the extensive yellow colouring rules out the species. In the keys to the males of the British species ( Disney, 1989) it runs to couplet 190 lead 1 or couplet 233. The colouring and the hypopygium excludes this species. It fails to run down in keys for the rest of the world’s fauna and subsequent additions.

Description. Male. Frons as Fig. 213 and devoid of microtrichia. Cheek with 5 bristles and jowl with 2 that are clearly longer and more robust ( Fig. 216 ). Postpedicels extremely pale and lacking SPS vesicles ( Fig. 215 ). Palps yellow and proboscis as Fig. 214 and with numerous short spinules below ( Fig. 216 ). Thorax ( Fig. 217 ) yellow, with 3 notopleural bristles and no cleft in front of these, mesopleuron bare, and scutellum with an anterior pair of small hairs and a posterior pair of bristles. Abdomen as Fig. 218 , with the hypopygium as Figs 219 & 220 . Legs yellow apart from brown tip to the hind femur. Fore tarsus with posterodorsal hair palisade on segments 1–4 ( Fig. 221 ). Dorsal hair palisade of mid tibia extends about 0.8 times its length ( Fig. 222 ). Hind femur as Fig. 223 . Hind tibia with 15–16 differentiated posterodorsal hairs, without anterodorsals, and spinules of apical combs simple. Wings ( Fig. 224 , 243 ) extremely pale and 1.87 mm long. Costal index 0.56. Costal ratios 3.4: 2.8: 1. Costal cilia (of section 3) 0.05 mm long. Hair at base of vein 3 only 0.01 mm long. With 3 axillary bristles, the outermost being 0.13 mm long. Sc very pale and reaching or else not quite reaching R1. Haltere almost white.

Type material. Holotype male, DENMARK, DK EJ, Onsild Mose , 5–25.VI 2017, Esben Bøggild ( UCMZ — 8–186).

Etymology. Named Esben’s grandson Svend.

Figures

FIGURE 243. Megaselia svendi n.sp., male, right wing, dorsal, detail.

FIGURES 213–224. Megaselia svendi n. sp. male. 213, frons; 214, postpedicel (Fig. 215), palp and proboscis; 216, proboscis from below; 217, left face of thorax; 218, left face of abdomen; 219–220, hypopygium; 221, front tarsus; 222, mid tibia; 223, hind femur; 224, wing.