Peradon elongatus (Hull)

Reemer, Menno, Skevington, Jeffrey H. & Kelso, Scott, 2019, Revision of the Neotropical hoverfly genus Peradon Reemer (Diptera, Syrphidae, Microdontinae), ZooKeys 896, pp. 1-93 : 1

Peradon elongatus (Hull) Figs 28 , 29 , 33 , 107 , 108 , 191-193 , 187-193 , 263

Microdon elongatus Hull, 1943: 706. Holotype ♂: Brazil, Pará (NHMUK) [examined].

Argentinomyia elongata (Hull): Thompson et al. 1976: 57.

Peradon elongatus (Hull): Reemer and Ståhls 2013a: 145.

Studied type specimens.

Brazil • 1 ♂, holotype of Microdon elongatus Hull; Pará, Santarem; NHMUK. Label 1 (small, round, red-bordered): "Holo- / type"; label 2: "Braz. / Santarem"; label 3 (red): "Holotype / Microdon /elongata / Hull". Coll. NHMUK. • 1 ♀; Villa nova; NHMUK. Label 1 (small, round, yellow-bordered): "Para- / type"; label 2: "Villa / nova"; label 3 (yellow): "Paratype / Microdon / elongata / Hull".

Additional specimens.

Brazil • 1 ♂; Amazonas, Novo Aripuanã, Malaise Igarapé, "Floresta úmida”; 05°15'53"S, 60°07'08"W; Sep. 2004; Henriques, Silva & Pena leg.; INPA (" INPA-DT / 0000080") • 1 ♀; Amazonas, Parque Nacional Jaú, Arm. Malaise, Campinarana baixa; 8-16 Apr. 2001; 01.5427 S, 61.3510 W; Henriques & Vidal leg.; INPA (" INPA-DIP / 001569").

Diagnosis.

Body length: male 10.5-11 mm, female 11-12 mm. The basally constricted abdomen, absence of a golden pilose triangle on the mesoscutum, and partially infuscated wings place this species in a group together with P. diaphanus , P. hermetia and P. hermetoides . Among these species, P. elongatus is the only one with yellow colouration on the wing: in the male, only the vena spuria is yellow, in the female the yellow parts are more extensive.

Distribution.

Brazil (Amazonas, Pará).

Notes.

The yellow wing colouration is much more extensive on the female than on the male. Similar sexual dimorphism in wing colouration also occurs in other Peradon species, e.g., P. chrysopygus and P. flavofascium . The male from the Brazilian state Amazonas was collected in humid forest along a small stream ( “igarapé”). The female from Amazonas was collected in a “campinarana”: a type of vegetation occurring in flat, sandy soils prone to waterlogging, usually dominated by thin trees (pers. comm. G.F.G. Miranda).

Figures

Figures 28 - 31. 28 - 30 Wings of Peradon species: 28 P. elongatus male (Brazil INPA) 29 P. elongatus female (Brazil INPA) 30 P. oligonax female (holotype) 31 Peradon oligonax male (Bolivia RMNH) mesonotum.

Figures 32 - 35. Tergite 2 dorsal 32 Peradon diaphanus female (neotype) 33 P. elongatus male (Brazil INPA) 34 P. hermetia male (holotype) 35 P. hermetoides male (holotype).

Figures 105 - 111. Dorsal habitus of Peradon species (trivittatus group) 105 P. hermetia ♂ holotype 106 ♂ P. hermetoides holotype 107 P. elongatus ♂ Brazil INPA 108 P. elongatus ♀ Brazil INPA 109 P. diaphanus ♀ neotype 110 P. oligonax ♂ Brazil LACM 111 P. oligonax ♀ Peru RMNH. Scale bar: 10 mm.

Figures 186 - 193. 186 Peradon diaphanus female, neotype: habitus lateral 187 - 190 Peradon elongatus male, holotype: 187 habitus dorsal 188 habitus lateral 189 head frontal 190 head lateral 191 - 193 Peradon elongatus female, paratype: 191 habitus dorsal 192 head frontal 193 head lateral.

Figures 262 - 267. Male genitalia of Peradon species 262 P. hermetoides holotype 263 P. elongatus holotype 264 P. oligonax Colombia NHMUK 265 P. satyricus holotype 266 P. sciarus paratype 267 P. bidens Suriname RMNH.