Megaselia eeroi Disney, 2018

DISNEY, R. Henry L. & WINQVIST, Kaj, 2018, New records including new species of Megaselia Rondani and Triphleba Rondani (Diptera: Phoridae) from Finland, Fragmenta Faunistica 61 (1), pp. 11-33 : 14-15

Megaselia eeroi Disney , n. sp.

( Figs 9–15 )

Diagnosis (male). In the key of Schmitz & Delage (1974) for Abteilung V it runs to couplet 6 on page 638, to M. divergens (Malloch) . However, Borgmeier (1964) incorrectly synonymized M. fenestralis (Schmitz) with this species, which was reinstated by Disney (1987). M. divergens is immediately distinguished by its brown anal tube, as well as by other small details such as its shorter costal index. M. fenestralis is immediately distinguished by its well developed lobe on the left side of the hypandrium ( Fig. 16 ), the elongated posteroventral lobes of the epandrium ( Figs 16–17 ), and by its wing having a small hair at the base of vein 3 and 2 axillary bristles.

Male. Frons as Fig. 9 and with dense but very fine microtrichia. Cheek with 5 bristles and jowl with 2 that are longer and more robust. Postpedicel as Fig. 10 , without SPS vesicles. Palp as Fig 11 . Labrum pale and about 0.5 times as wide as a palp. Labella pale and with about a dozen short spinules below each. Thorax brown. Three notopleural bristles and no cleft in front of these. Mesopleuron with only 2–3 hairs. Scutellum with an anterior pair of small hairs and a posterior pair of bristles. Abdominal tergites brown with moderate hairs largely restricted to hind margins. Venter light brownish gray, and with hairs on segments 3–6. Hypopygium as Fig. 12–14 . Legs brown but not dark. (Fore tarsal segments 2–5 missing in type). Dorsal hair palisade of mid tibia extends only about 0.4 times its length. Hind femur as Fig. 15 . Hind tibia with 16–18 moderately differentiated posterodorsal hairs, without anterodorsals, and spinules of apical combs simple. Wings very pale and 1.22 mm long. Costal index 0.38–0.40. Costal ratios 4.3: 1.0: 1. Costal cilia (of section 3) 0.10 mm long. No hair at base of vein 3. With 2 axillary bristles, the outer being 0.07 mm long. Sc not reaching R1. Thick veins pale gray, thin veins 4–6 very pale gray and 7 not evident. Haltere with brown knob.

Material examined. Holotype male, Finland, Ab : Mynämäki, Karjalankylä, 67568:32279, 13 Sep–20 Nov 2012, E. Vesterinen leg. (hybrid trap) ( UCZM, 34-186)

E t y m o l o g y. For Eero Vesterinen, the collector of the holotype.

Figures

Figs 9–15. Megaselia eeroi n. sp. male: 9 – frons; 10 – postpedicel; 11 – palp; 12–14 – hypopygium; 15 – hind femur.

Figs 16–17. Megaselia fenestralis (Schmitz) male hypopygium: 15 – left face; 16 – right face.