Monohelea ema Felippe-Bauer & Trindade, 2017

Felippe-Bauer, Maria Luiza, Cardoso, Erick Aragão & Trindade, Rosimeire Lopes Da, 2017, New species and new records of Monohelea Kieffer from eastern Amazon, Brazil (Diptera: Ceratopogonidae), Zootaxa 4358 (1) : -

Monohelea ema Felippe-Bauer & Trindade sp. nov.

( Figs. 1 ; 4 A–G; 9 E–F)

Diagnosis. The only Neotropical species of Monohelea in which the males have hind femur with brown base, mid leg with distinct mesal brown bands, paramere with mesal hook-shaped process measuring 0.61X as long as distal portion that progressively narrows distally to rounded apex. Female unknown.

Male. Head: eyes widely separated ( Fig. 4 C ). Antenna missing. Palpus ( Fig. 4 D ) pale brown; 3rd segment nearly oval with small, shallow, sensory organ on apical 1/3; lengths of segments 20- 25- 25- 25- 43; palpal ratio 1.25.

Thorax. Brown; scutum damaged. Legs ( Fig. 4 F ) yellow; fore leg missing, mid-, hind coxae and trochanters brown; mid femur with basal and mesal pale brown bands, hind femur with basal brown band, one brown stripe in middle, a subapical ventral brown spot; mid tibiae with a mesal and apical pale brown band; hind tibia missing. Tarsi: mid tarsomere 1 with 2 basal, 2 apical spines; mid tarsomeres 2–4 with 2-2-2 apical spines, basal spines absent; mid tarsomere 5 missing; mid tarsal ratio 2.22; claws missing. Wing ( Fig. 4 A ) partially damaged; macrotrichia restricted to vein costa; microtrichia absent; 2nd radial cell nearly 2X longer than 1st; wing length nearly 0.90 mm, width 0.34 mm; costal ratio nearly 0.75. Halter stem pale; knob pale brown in distal 1/2, a pale brown spot laterally ( Fig 4 B ).

Abdomen. Pale brown ( Fig. 4 E ). Genitalia ( Figs. 4 G ; 9 E–F): sternite IX spiculate except on basal portion, posterior margin with a short, convex, median lobe with 4 long setae; tergite IX tapering with a pair of apicolateral processes. Gonocoxite moderately stout, nearly 1.8 X longer than basal width; gonostylus curved in apical 1/2, 0.59 as long as gonocoxite, moderately pilose on basal 3/4. Parameres ( Fig. 9 E ) 1.36 X as long as aedeagus, broadly fused at trilobed base; each with a long, curved, sclerotized mesal hook-shaped process, 0.61X as long as distal portion of the paramere, that tapering gradually to blunt apex. Aedeagus ( Fig. 9 F ) triangular, composed of 2 pointed ventral plates, with slightly sclerotized dorsal structure, which arises in the middle way to aedeagus base, and produced beyond the apices of ventral plates, ending as an apical projection; basal arms slender, slightly expanded laterally.

Female. Unknown

Distribution. Brazil, Pará State.

Type. Holotype male, on microscope slide labeled “Fazenda Ema (01°24’37”S, 46°22’12”W), Viseu, Pará, BRASIL, 23–24.VI.2007, CDC light trap, forest, Guimarães, D. col. ( MPEG).

Etymology. This species is named after the type locality.

Taxonomic discussion. Characters for distinguishing Monohelea ema from the related species may be found in the discussion under the description of the M. cornuta .

Figures

FIGURE 1. Distribution of Monohelea species in the Municipalities of Capitão Poço, Ourém, Tracuateua and Viseu from Northeast Mesoregion, and in the municipality of Santa Bárbara do Pará from Metropolitan Belém Mesoregion, Para State, Brazil.

FIGURE 4. Monohelea ema Felippe-Bauer & Trindade sp. nov., male. A. Wing; B. Thorax showing halter; C. Head, anterior view; D.Palpus, lateral view; E. Abdomen, ventral view; F. Legs (up to botton) hind femur, mid leg, lateral view; G.Genitalia, ventral view.

FIGURE9. Parameres and aedeagus. A–B.Monohelea barbara Felippe-Bauer& Trindade sp. nov.; C–D.Monohelea cornuta Felippe-Bauer & Trindade sp. nov.; E–F. Monohelea ema Felippe-Bauer & Trindade sp. nov.; G–H. Monohelea forceps Felippe-Bauer & Trindade sp. nov.