Peradon aureoscutus (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 aureoscutus (Hull) Figs 13 , 19 , 21 , 104 , 151 , 152 , 257

Microdon aureoscutus Hull, 1943: 709. Holotype ♂: Amazon (NHMUK) [examined]; Thompson et al. 1976: 63.

Peradon aureoscutus (Hull): Reemer and Ståhls 2013a: 146.

Studied type specimens.

Amazon Region • 1 ♂, holotype of Microdon aureoscutus Hull; Amazon; NHMUK. Label 1 (small, round, red-bordered): "Holo- / type"; label 2: "Amazon / 6653"; label 3 (red): "Holotype / Microdon / aureoscutum / Hull". According to Hull (1943) this specimen was collected by H.W. Bates.

Diagnosis.

Body length: male 11 mm. The triangle of golden pile on the mesoscutum places this species in a group together with P. aureus , P. trilinea and P. trivittatus . From the latter two species, P. aureoscutus differs by the absence of golden pile along the anterior and lateral margins of the mesoscutum. The species differs from P. aureus by the triangle of golden pile on the mesoscutum being wider than long and restricted to the posterior half of the mesoscutum. In the male, the ratio vertex width:head width is approximately 1:4.3 ( Fig. 19 ), and the lateral margins of tergite 2 are rather evenly diverging posteriad. Male genitalia as in Fig. 257 . The female is unknown.

Notes.

See P. aureus .

Distribution.

Known from the Brazilian Amazon region.

Figures

Figures 13 - 18. 13 - 15 Mesoscutum: 13 Peradon aureoscutus male holotype 14 P. aureus male Ecuador CNC 15 P. trivittatus male French Guiana RMNH 16 Peradon fenestratus, scutellum lateral 17, 18 Tergites 2 and 3: 17 Peradon trilinea male holotype 18 P. aureus male holotype.

Figures 19 - 24. 19, 20 Head dorsal: 19 Peradon aureoscutus male holotype (HW = head width, VW = vertex width) 20 P. aureus male Ecuador CNC 21 - 24 Tergite 2 dorsal: 21 Peradon aureoscutus male holotype 22 P. aureus male Ecuador CNC 23 P. trilinea male holotype 24 P. trivittatus male French Guiana RMNH.

Figures 97 - 104. Dorsal habitus of Peradon species (trivittatus group) 97 P. trivittatus ♂ Suriname RMNH 98 P. trivittatus ♀ Suriname RMNH 99 P. fenestratus ♀ Brazil INPA 100 P. trilinea ♂ holotype 101 P. trilinea ♀ Peru NHMUK 102 P. aureus ♀ holotype 103 P. aureus ♂ Ecuador CNC 104 P. aureoscutus ♂ holotype. Scale bar: 10 mm.

Figures 151, 152. Peradon aureoscutus male, holotype 151 habitus lateral 152 wing.

Figures 256 - 261. Male genitalia of Peradon species 256 P. fenestratus French Guyana MNHN 257 P. aureoscutus holotype 258 P. aureus Ecuador CNC 259 P. trilinea holotype 260 P. trivittatus Suriname RMNH 261 P. hermetia holotype.