Asymphyloptera lutea, Sinclair, Bradley J., 2015

Sinclair, Bradley J., 2015, New World species of Asymphyloptera Collin (Diptera: Empididae: Clinocerinae), Zootaxa 4048 (4), pp. 553-564 : 562

Asymphyloptera lutea sp. nov.

( Fig. 15 )

Asymphyloptera sp. 3: Sinclair, 1995: 686.

Type material. HOLOTYPE, ♂ labelled: “CR[ Costa Rica]: Heredia, 9km NE Vara/ Blanca, ALAS transect (Finca/ Morillo), 1500m, 9–11.iii.2005 / M. Pollet, YPT 1–6, rainforest/ small brook (site 1)/ [Pollet sample: CR/ 2005/043]”; “ HOLOTYPE / Asymphyloptera / lutea / Sinclair [red label]” ( CNC). PARATYPES: Costa Rica: Cartago, 1 km W Santa Cruz de Turrialba, 5500', stream in gorge, 13.iii.1991, Grimaldi & Stark (1 ♂, 1 ♀, AMNH); Guanacaste, Rincon de La Veja NP, Rio Colorado/ Puesto Las Pailas, N10º46.51' W85º20.85', 800 m, 17.viii.2010, J.B. Runyon (8 ♂, 2 ♀, CNC); Heredia, 10 km SE La Virgen, N10º20' W84º05', INBio-OET-ALAS transect, banks of Rio Peje, 12–16.ii.2003, pan traps, M. Pollet (1 ♀, CNC).

Additional material examined. Costa Rica: Puntarenas, Monteverde, 1500 m, 1-10.iii.1992, MT, beside stream, D.M. Wood (1 ♀, CNC).

Recognition. This species is readily distinguished by the yellowish coxae and femora; pleura yellowish to brown; narrow, tapered surstylus with pointed apex; phallus arched posteriorly, apex expanded and membranous.

Description. Male. Postpedicel globular with long, slender apical extension, arising subapically. Ocellar setae stout, similar in length to postpedicel extension. Labrum slightly shorter than clypeus; palpus brown, subequal to labrum, tapered to slender apex.

Pleura yellow to brown. Chaetotaxy stout; 1 pprn short, very slender; 2 npl, lower slender and shorter; 4–5 dc, anterior dc offset; 2 apical sctl, slightly longer than prescutellar dc, lacking lateral sctl. Coxae and femora yellowish, remaining segments brown; fore femur with antero- and posteroventral rows of pale, slender setae, subequal in length to width of femur; fore tibia without erect setae. Wing length 1.1–1.7 mm; crossvein h distinct; base of wing with 2–3 long, stouter setulae along posterior margin, separated from finer distal setulae by wide gap. Halter pale, yellowish.

Male terminalia ( Fig. 15 ): Cercus with anterior lobe slightly produced; posterior lobe long, slender. Hypandrium prolonged as broad, paired postgonites; apical margin of postgonite rounded, not extended anteriorly. Epandrium narrow, with elongate setae on apical half. Surstylus shorter than cercus, slender, arched, tapered to pointed apex; not extending beyond phallus. Phallus strongly arched posteriorly; apex expanded, membranous; ejaculatory apodeme narrow, not expanded.

Female. Similar to male except as follows: lacking long ventral setae on fore femur. Terminalia not dissected.

Etymology. The specific name is from the Latin luteus (yellow), in reference to the yellowish coloured legs and pleura.

Distribution. This species appears to be restricted to Costa Rica ( Fig. 17 ).

Figures

FIGURE 17. Distribution of Asymphyloptera in the New World.

FIGURES 13 – 16. Male terminalia of Asymphyloptera, lateral views. 13, A. dominica sp. nov.; 14, A. havasu sp. nov.; 15, A. lutea sp. nov.; 16, A. mexicana sp. nov. Scale bars 0.1 mm. Abbreviations: pgt—postgonite; ph—phallus; sur—surstylus.