Triphleba cumsetae, DISNEY & WINQVIST, 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 : 30-31

Triphleba cumsetae n. sp.

( Figs 86–91 )

Diagnosis. In the key of Schmitz (1943) it runs to couplet 61 on page 144. The lack of sternite 7 distinguishes T. distinguenda (Strobl) although its tergites 5 and 6 are similar ( Fig. 92 ) and even more so in a teneral specimen ( Fig. 93 ). It is possible, therefore that the holotype of T. cumsetae is teneral. The other species of couplet 61 is the Hungarian T. longifurcata (Schmitz), whose female is unknown. It is possible that T. cumsetae is a teneral specimen of T. longifurcata, but Schmitz’s description of vein 3 makes no reference to a row of hairs before the fork (see below).

Female. Head as Fig. 86 . Notopleuron with 3 bristles, the most anterior being the longest and the most posterior the shortest. Scutellum as Fig. 87 . Abdominal tergites light brown ( Fig. 88 ), with T7 represented by hairs only. Venter brownish gray with hairs on segments 3 to 6, with the longest at the rear of segment 6. Sternite 7 as Fig. 89 . Legs brown. Hind femur and tibia as Fig. 90 . Wing ( Fig. 91 ) 2.24–2.25 mm long. Costal index 0.48. Costal ratios 1.8: 1.3: 1. Costal cilia (of section 3) 0.09 mm long. The single axillary bristle 0.14 mm long. The hair at base of vein 3 is 0.16 mm long; and with a row of smaller hairs before the fork ( Fig. 87 ). Haltere brown.

M a t e r i a l e x a m i n e d. Holotype female, Finland, Ab : Turku, Pahaniemi, 67115:32365, 5 Sep 2014, margin of wood, K. Winqvist ( UCMZ, 34-164).

Etymology. From cum (with) setae (hairs), referring to the hair on vein 3 in addition to the bristle at its base.

Figures

Figs 86–87. Triphleba cumsetae n. sp. female: 86 – head; 87 – scutellum and hairs before fork on vein 3.

Figs 88–91. Triphleba cumsetae n. sp. female: 88 – abdominal tergites 3–6; 89 – sternite 7; 90 – tip of hind femur and tibia; 91 – wing.

Figs 92–93. Triphleba distinguenda female: 92 – abdominal tergites 5 and 6; 93 – T5 & T6 of a teneral specimen.