Mesembrinella andina ( Wolff, Bonatto & Carvalho, 2014 )

Whitworth, Terry L. & Yusseff-Vanegas, Sohath, 2019, A revision of the genera and species of the Neotropical family Mesembrinellidae (Diptera: Oestroidea), Zootaxa 4659 (1), pp. 1-146 : 138-140

Mesembrinella andina ( Wolff, Bonatto & Carvalho, 2014)

( Figs 498–505 )

Thompsoniella andina Wolff et al., 2014: 323 . Holotype male (CEUA), not examined. Type locality: Andes , Antioquia, Colombia.

Thompsoniella andina: Wolff & Kosmann (2016: 870) ; Marinho et al. (2017: tab. 1).

Mesembrinella andina: Cerretti et al. (2017 : tab. 2).

Diagnosis. A small fly, the lone male specimen examined is 10 mm long. Similar to M. anomala except male with T5 about 1.5x as long as T4; coxae, trochanters and femora orange with dark apices dorsally; ac 0:0. Terminalia with epandrium lacking an anteroventral extension, unique shape easily separated from M. anomala ( Fig. 498–499 ); epiphallus short, with only a slight curve in lateral view ( Fig. 500 ).

Redescription. Male. Frons broad, 0.14 of head width at narrowest. Fronto-orbital broad below, narrowing above, black with silvery tomentum; stout black frontal setae ascending about 1/3 of distance to vertex; frontal vitta broad and black with silvery tomentum extending to base of ocellar triangle; parafacial with lower half yellow-orange and upper half gray; gena orange with a short vertical row of stout black setae and scattered short brown setae; postgena orange to gray with long, silky yellow setae; occiput with short row of black postoccipital setae ending 1/3 of way from outer margin of eye; occiput black with silvery tomentum, lower 2/3 with silky, yellow setae; median occipital sclerite subshining black; antenna: pedicel brown, first flagellomere grey arista with short fine setae; palpus typical; eye with median facets about 2x size of lateral facets; median ocellus 2x size of posterior ocelli; facial ridge with short black supravibrissal setae over about 1/10 of distance to antennal base.

Thorax. Dorsum black with blue-gray tomentum; pleura blue-gray except orange around anterior spiracle; chaetotaxy: ac 0:0, dc 2:2, ia 0:2, ph 0, ppn 2x 2, kat 1:1; meral setae fine, in a short vertical row with a couple of short horizontally-arranged setae, 1 pair crossing ap, 1 stout bas, 0 disc, 0 pb; subscutellum moderately developed; spiracles orange and medium-sized; legs: femora orange except apices brown dorsally, tibiae and tarsi brown. Wing hyaline, faintly darkened along costa, subcostal sclerite with heavy pubescence, basicosta and tegula brown, section IV 0.16 of section III; upper calypter with tan disc and black rim with reddish-brown setae, lower calypter with reddish-brown disc, rim and setal fringe.

Abdomen. T1+2 with anterior 2/3 orange, posterior 1/3, T3–5 shining blue with pale tomentum, T5 1.5x as long as T4. Terminalia in lateral view with short surstylus, broad at base and narrowed distally, curving forward, cercus large, curved forward ( Fig. 498 ); in posterior view as in Fig. 499 ; knob-like bases of surstyli exposed at tip of abdomen, similar to M. anomala (see Fig. 497 ); phallus in lateral view with epiphallus short and sinuous ( Fig. 500 ); in dorsal view broad, hypophallic lobes with fine serrations ( Fig. 501 ); T6, STS7+8 as in Fig. 502 ; pre- and postgonites as in Fig. 503 ; hypandrium as in Fig. 504 ; sternites short and broad, as in Fig. 505 .

Female. Unknown.

Material examined. Ecuador, Pichincha. 1 ♂, Bellavista Reserve , 0°0ʹ54ʺS 78°40ʹ56ʺW, 2200 m, v.2011, A.D. Young, debu 00339815 ( UGG) .

Distribution. Colombia, Ecuador.

Remarks. No specimens were barcoded.

Figures

FIGURES 498–505. Epandrium, cerci and surstyli of Mesembrinella andina (Wolff et al.). 498. Epandrium, cerci and surstyli in left lateral view. 499. Epandrium, cerci and surstyli in posterior view. 500. Phallus in left lateral view. 501. phallus in dorsal view. 502. T6 and STS7+8. 503. Pre- and postgonite. 504. Hypandrium. 505. ST1–5.

FIGURES 489–497. Diagnostic characters of Mesembrinella spp. 489. Dorsal view of stem vein of wing of M. bellardiana Aldrich showing stem vein setose. 490. Detail of wing of M. batesi Aldrich in ventral view, showing setose condition of subcostal sclerite. 491. Epandrium of M. mexicana sp. nov. in posterior view, showing broad dorsal division found in M. spicata group. 492. Detail of abdomen of male M. epandrioaurantia sp. nov., showing orange color of rear segments. 493. Detail of dorsal habitus of M. socors (Walker), showing triangle of bluish cuticle on hind margin T3. 494. Wing of M. pictipennis Aldrich, showing pattern of infuscation. 495. Posterodorsal habitus of male M. townsendi Guimar„es, showing wing pattern and stripes on thorax. 496. Detail of male abdomen of M. anomala (Guimar„es), showing relative lengths of T4 and T5. 497. Same as previous, showing modification of T6, STS7+8 and epandrium.