Myriophora magnilabellum, Hash, John M. & Brown, Brian V., 2015

Hash, John M. & Brown, Brian V., 2015, Revision of the New World Species of the Millipede-Parasitic Genus Myriophora Brown (Diptera: Phoridae), Zootaxa 4035 (1), pp. 1-79 : 35

Myriophora magnilabellum sp. nov.

(Figs 5.8, 12.5, 18.6, 21.5, 21.10)

Diagnosis. Female. Myriophora magnilabellum is easily recognizable by the long thin oviscape and labellar lobes that are over 2x wider than the maxillary palps (Fig. 21.10). This species also lacks the lower pair of supra-antennal setae that is common in species with a large, distinct seta on the anepisternum.

Description. Female (Fig. 5.8). Body length 1.82–2.31 mm. Head: Frons brown, with 1 pair of supra-antennal setae; supra-antennals originate even with lower interfrontal setae. First flagellomere yellow-brown, rounded under arista. Palpus yellow, slightly inflated. Labrum normal sized. Labellum swollen. Thorax: Scutum dusky yellow. Scutellum dusky yellow. Anterior scutellar setae about 3/4 length of the posterior pair. Pleuron yellow; anepisternum with setulae and one large seta. Forefemur yellow. Midfemur yellow. Hind femur yellow with brown patch distally on anterior surface. Wing length 1.61–2.35 mm (Fig. 12.5); costal vein normal; costal length 0.84– 1.26 mm; mean costal ratio 0.54. Knob of halter brown. Abdomen: Tergites 1 and 2 brown; tergite 2 with strong, distinct setae on lateral margin. Tergite 5 brown; posterior setae on tergite 5 short. Tergite 6 rectangular to slightly narrowing posteriorly; posterodorsal setae on segment 6 shorter than posteroventral setae. Venter of abdomen with sparse, long setae. Oviscape (Fig. 18.6) sclerites brown, weakly laterally compressed; sternite very elongated; tergite expanded laterally at apex, ovate and flattened dorsally.

Distribution. Costa Rica.

Host. Unknown.

Etymology. A noun from Latin for "large labellum" referring the distinctly enlarged labellum.

Holotype. ♀, COSTA RICA: Alajuela: 2km W Dos Rios, 10.88°N, 85.38°W, 600m, viii.1988 [ LACM ENT 007154].

Paratypes. COSTA RICA: Alajuela: Alberge de Heliconia, 10.71°N, 85.04°W, 700m, 1♀, 19–23.ii.2002, Brown, Gonzalez, Walker, Zumbado, Malaise trap [ LACM ENT 158159], San Ramon, 10.22°N, 84.62°W, 900m, 2♀, vii–viii.1995, P. Hanson, Malaise trap [ LACM ENT 130843, 130925); Guanacaste: Cerro Pedregal, Volcan Cacao, 10.93°N, 85.48°W, 1000m, 5♀, ii–iv.1989, I. Gauld, D. Janzen, Malaise trap [ LACM ENT 307179, 0 39997, 0 40006, 307180, 307181]; Puntarenas: Las Cruces, 8.80°N, 82.97°W, 1200m, 1♀, vi–vii.1988, P. Hanson, Malaise trap [ LACM ENT 048784].