Megaselia hobroensis, Henry & Bøggild, 2021

Henry, R. & Bøggild, Esben, 2021, Nineteen new species of Megaselia Rondani (Diptera, Phoridae) from Denmark, Zootaxa 4975 (2), pp. 306-342 : 319

Megaselia hobroensis n. sp.

( Figs 82–96 )

Diagnosis. In the keys of Lundbeck (1922) it runs to Group IV couplet 38, or Group V couplet 12 lead 2, it fits none of the options. In the key to the males of the British species ( Disney, 1989) it runs to couplets 81 lead 2 or 143, but the hypopygium differs from these species. Other excluded species running to these points have different hypopygia, apart from other details such as possession of SPS vesicles in the postpedicels and/or very pale wings. In the keys of Schmitz & Beyer (1965) for Abteilung IV Zweite Reihe it runs to couplet 53 but again the hypopygium differs and the palps are darker. In the keys of Schmitz & Delage (1974) for Abteilung V it runs to couplet 35 lead 1 or couplet 82 lead 1, but the hypopygia of these species differ (being figured by Disney, 2003 and 2011c). It fails to run down in keys for the rest of the world’s fauna and subsequent additions. It should be noted that the front basitarsus looks broader in one orientation but narrower in another orientation.

Description. Male. Frons as Fig. 82 , with the fine microtrichia restricted to the edges and adjacent to the median furrow. Cheek with 3–4 bristles and jowl with 2 that are clearly longer and more robust. Postpedicels, without SPS vesicles ( Fig. 84 ), palps and proboscis as Fig. 83 . Thorax as Fig. 85 , having 3 notopleural bristles and no cleft in front of these, the mesopleuron with hairs and the scutellum with an anterior pair of small hairs and a posterior pair of bristles. Abdominal tergites brown with small hairs that are scarcely longer at the rear of T6. Venter gray, and with hairs on segments 3–6. Hypopygium as Figs 86–91 , the epandrium with small hairs only, the pale left lobe of the hypandrium being large and with long projecting microtrichia but the right lobe being vestigial. Legs light brown to dusky yellow. Fore tarsus with posterodorsal hair palisade on segments 1–5 with 5 longer than 4 ( Fig. 92 ) and the basitarsus with rows of spinules below ( Fig. 93 ). Dorsal hair palisade of mid tibia extends 0.62–0.67 times its length ( Fig. 94 ). Hind femur as Fig. 95 . Hind tibia with about two dozen moderately differentiated posterodorsal hairs, without anterodorsals, and spinules of apical combs simple. Wings ( Fig. 96 ) 1.40–1.61 mm long. Costal index 0.43–0.48. Costal ratios 2.6–4.3: 1.1–1.9: 1. Costal cilia (of section 3) 0.10–0.12 mm long. Hair at base of vein 3 only 0.02 mm long. With 3–4 axillary bristles the outermost being 0.1–0.14 mm long. Sc not reaching R1. Haltere brown.

Type material. Holotype male, DENMARK, DK, EJ, Nr. Onsild Mose, 21.VI.–7.VII.2017, Esben Bøggild ( UCMZ —9–19) . Paratypes: 4 males as holotype and 3 males except dates 21. VI –7.VII.2017, Esben Bøggild ( UCMZ —9–16); 1 male, DK NEJ , Døstrup Simested Á, 17. VI.–10.VII.2016, Esben Bøggild ( UCMZ —8–185).

Etymology. Named after the town of Hobro which is very close to the type locality. M. hobroensis is also found on the Swedish islands of Gotland and Öland (Hartop & Bøggild, unpublished).

Figures

FIGURES 82–96. Megaselia hobroensis n. sp. male. 82, frons; 83, postpedicels (Fig. 84), palps and proboscis; 85, side of thorax; hypopygium 86–91, 92, front tarsus; 93, front basitarsus; 94, mid tibia and basitarsus; 95, hind femur; 96, wing.