Peradon bispina (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 bispina (Hull) Figs 37 , 128 , 171-173 , 271

Microdon bispina Hull, 1943: 707. Holotype ♂: Brazil, São Paulo (NHMUK) [examined]; Thompson et al. 1976: 64.

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

Studied type specimens.

Brazil • 1 ♂, holotype of Microdon bispina Hull; São Paulo; H.W. Bates leg.; NHMUK. Label 1 (small, round, red-bordered): "Holo- / type"; label 2: "S. / Paulo"; label 3: "Holotype / Microdon / bispina / Hull". Hull (1943) notes that the specimen was collected by H.W. Bates.

Additional specimens.

Brazil • 1 ♂; Manaus, Amazonas; 13 May 1967; Y. Sedman leg.; CNC.

Diagnosis.

Body length 8.5-11.5 mm. A small, slender, black species of the bidens group, of which only males are known. The wings are infuscate and there is a narrow yellow marking on cell r4+5 between the apical part of the vena spuria and vein M posterior to it ( Fig. 37 ). This separates the species from similar species, in which the yellow wing marking is either absent or situated in a different part of the wing.

Notes.

In the holotype, the head of a species belonging to a different microdontine genus has been glued to the specimen: it is too large and of uncharacteristic shape for Peradon (lateral oral margin not produced). The specimen from Manaus is considerably smaller (8.5 mm) than the holotype from Sao Paulo (11.5 mm). The specimens are considered conspecific because of the otherwise striking similarities in morphology and colouration.

Distribution.

Known from Manaus and São Paulo in Brazil.

Figures

Figures 36 - 47. 36 - 46 Wings of Peradon species of the bidens - group: 36 P. bidens ♂ Suriname RMNH 37 P. bispina ♂ holotype 38 P. aurifascia ♂ holotype 39 P. angustiventris ♂ Suriname RMNH 40 P. angustus ♀ neotype 41 P. flavipennis ♀ holotype 42 P. normalis var. SUR- 17 B ♀ Suriname RMNH 43 P. normalis typical var. ♀ Suriname RMNH 44 P. pompiloides ♂ holotype 45 P. pompiloides ♀ paratype 46 P. niger ♂ holotype 47 Wing of P. palpator ♂ holotype (flavofascium group)

Figures 119 - 128. Dorsal habitus of Peradon species (bidens group) 119 P.? normalis ♂ Brazil Rondonia LACM 120 P. normalis typical morph ♀ French Guiana RMNH 121 P. normalis red morph ♀ Brazil Para LACM 122 P. normalis SUR- 17 b morph ♀ 123 P. niger ♂ holotype 124 P. niger ♀ (holotype M. manni Shannon) 125 P. flavipennis ♀ holotype 126 P. pompiloides ♂ holotype 127 P. pompiloides ♀ paratype 128 P. bispina ♂ Brazil CNC. Scale bar: 10 mm.

Figures 171 - 176. 171 - 173 Peradon bispina male, holotype: 171 habitus dorsal 172 habitus lateral 173 head frontal (the head belongs to a species of another microdontine genus, see text) 174 - 176 Peradon brevis male, holotype: 174 habitus dorsal 175 head frontal 176 head lateral.

Figures 268 - 273. Male genitalia of Peradon species 268 P. costaricensis paratype 269 P.? normalis Brazil Rondonia LACM 270 P. niger holotype 271 P. bispina holotype 272 P. pompiloides holotype 273 P. aurifascia Sao Paulo CNC.