Megaselia simestedensis, Henry & Bøggild, 2021

Henry, R. & Bøggild, Esben, 2021, Nineteen new species of Megaselia Rondani (Diptera, Phoridae) from Denmark, Zootaxa 4975 (2), pp. 306-342 : 332-334

Megaselia simestedensis n. sp.

( Figs 199–212 )

Diagnosis. In the key of Lundbeck (1922) for Group IV it runs either to couplet 30 lead 2 M. dubiosa (Lundbeck), a synonym of M. subconvexa (Lundbeck) , which is distinguished by its brown Halteres, darker legs and broader front basitarsis with rows of spinules ventrally; or to couplet 33, where the hypopygia differ from our species. In the key to the males of the British species ( Disney, 1989) it runs to couplet 107, lead 2 M. consetigera (Schmitz), but it has brown Halteres, a different hypopygium and longer hairs below the basal half of the hind femur. Other species running to this couplet include M. subnitida (Lundbeck) , rescued from synonymy by Disney & Häggqvist (2018), but it’s hypopygium has a much longer left hypandrial lobe and longer hairs below the basal half of the hind femur. In the key of Schmitz & Beyer (1965) for Abteilung IV Zweite Reihe it runs to couplets 60 lead 2 or 65 lead 1 or 78 lead 2 but all these options are excluded in the key to the males of the British species. Otherwise the most similar Palaearctic species is M. tofteensis described below. In Borgmeier’s (1964) key for Nearctic Group IV it runs to couplet 17 lead 2 M. cribella Borgmeier, but its anal tube clearly exceeds the length of the dorsal edge of the epandrium. Our species fails to run down in keys for the rest of the world fauna or subsequent additions.

Description. Male. Frons (fig 199) with dense but very fine microtrichia. Cheek with 4 bristles and jowl with 2 that are longer and more robust. Postpedicels, which lack SPS vesicles, and palps as Fig. 200 . Proboscis from below as Fig. 201 , the labella with numerous very small spinules. Thorax brown, with 3 notopleural bristles and no cleft in front of these; and mesopleuron with only 2–3 small hairs ( Fig. 202 ). Scutellum ( Fig. 203 ) with an anterior pair of small hairs hairs and a posterior pair of bristles. Abdominal tergites brown and venter gray with hairs on segments 3–6 ( Fig. 204 ). Hypopygium as Figs 205–209 . Legs yellowish to paler. Fore tarsus with posterodorsal hair palisades on segments 1–4 ( Fig. 210 ). Dorsal hair palisade of mid tibia extends about 0.76 times its length. Hairs below basal half of hind femur subequal in length to those of anteroventral row of outer half except those at base are shorter ( Fig. 211 ). Hind tibia with a dozen moderately differentiated posterodorsal hairs, without anterodorsals, and spinules of apical combs simple. Wings ( Fig. 212 ) 1.52 mm long. Costal index 0.47. Costal ratios 3.2: 2.5: 1. Costal cilia (of section 3) 0.11 mm long. Vein 3 hair 0.04 mm long. 5 axillary bristles, the outermost being 0.09mm long. Sc not reaching R1. Haltere knob pale.

Type material. Holotype male, DENMARK, DK, NEJ, Døstrup Simested Å, 13.VIII–20.IX.2016, Esben Bøggild ( UCMZ —9–26).

Etymology. Named after the type locality.

Figures

FIGURES 199–212. Megaselia simstedensis n. sp. male. 199, frons; 200 antenna, palps and proboscis; 201 proboscis from below; 202, side of thorax; 203, scutellum; 204, abdomen; 205, left face of hypopygium; 206, left face of epandrium; 207, left view of hypandrium and penis complex; 208, right face of hypopygium; 209, right view of hypandrium; 210, front tarsus; 211, hind femur; 212, wing.