Peradon flavofascium (Curran)

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 flavofascium (Curran) Figs 12 , 74 , 75 , 86 , 88 , 90 , 92 , 138 , 201-205 , 277

Microdon flavofascium Curran, 1925: 346. Holotype ♂: Brazil, Minas Gerais, Lassance (CU) [examined].

Not Microdon flavofascium Curran of Van Doesburg 1966: 80; see P. surinamensis sp. nov.

Not Peradon flavofascium (Curran) of Reemer 2014: 43; see P. surinamensis sp. nov.

Studied type specimens.

Brazil • 1 ♂, holotype of Microdon flavofascium Curran; Minas Garais, Lassance; 9-19 Nov. 1919; Cornell Univ. Expedition leg.; CU. Label 1: "Lassance, Min- / as Ger’s Brazil / 9-19 Nov. 1919"; label 2: "Cornell Univ. Ex- / pedition. Lot 569"; label 3 (red): "TYPE / Microdon / flavofasciatum [sic] / Curran / No."; label 4 (pink): "HOLOTYPE / Cornell U. / No. 1737"; label 5: "Microdon / flavofascium / Curran / Det. / C.H. Curran".

Additional specimens.

Brazil • 1 ♂ 1 ♀; Utiariti, Rio Papagaio, Mt; Oct. 1966; Lenko & Pereira leg.; MZUSP • 1 ♀; Utiariti, Rio Papagaio, Mt; Nov. 1966; Lenko & Pereira leg.; MZUSP • 1 ♂; Minas Gerais, Serra Caraça; Nov. 1961; Kloss, Lenko, Martins & Silva leg.; MZUSP • 1 ♀; Cáceres, MT; 9-11 Nov. 1984; C. Elias leg.; UFPR.

Diagnosis.

Body length: male 7.5-8.5 mm, female 8.5-9.0 mm. A rather small species of Peradon with a yellow macula in the wing, silvery white pile on tergites 4 (and 5 in the female) and a bare postpronotum. These three characters are only shared with P. surinamensis sp. nov., from which it differs as follows: alula bare for maximally 30% (only narrowly microtrichose in P. surinamensis ), male with yellow wing macula extending to cell r1 anteriorly, and additional characters stated in the key.

Notes.

The genitalia of the male holotype are figured in Fig. 277 . The genitalia of additional specimens from the Brazilian state of Minas Gerais (where the holotype is also from) were found to look more similar to those of P. surinamensis sp. nov. However, in external characters these specimens are very similar to the type of P. flavofascium . Re-examination of the latter type revealed that the appearance of the surstylus strongly depends on the viewing angle: from certain angles, the shape of the surstylus is similar in P. flavofascium and P. surinamensis . Despite this, the specimens are considered different enough in external characters to consider them as different taxa.

Distribution.

Known from the Brazilian states Mato Grosso and Minas Gerais.

Figures

Figures 9 - 12. 9, 10 Antennal length ratios: 9 Peradon palpator male, basoflagellomere more than twice as long as scape 10 P. bidens male, basoflagellomere less than twice as long as scape 11, 12 Tergites in lateral view: 11 with golden pilosity (Peradon aurigaster male) 12 with silvery white pilosity (P. flavofascium male).

Figures 74 - 85. Wings of Peradon species of the flavofascium - group 74 P. flavofascium ♂ holotype 75 P. flavofascium ♀ 76 P. surinamensis ♂ holotype 77 P. surinamensis ♀ Suriname RMNH 78 P. aurigaster ♂ holotype 79 P. aurigaster ♀ Peru CNC 80 P. ballux ♂ holotype 81 P. brevis ♂ holotype 82 P. notialus ♂ holotype 83 P. notialus ♀ paratype 84 P. chrysopygus ♂ Costa Rica RMNH 85 P. chrysopygus ♀ Belize MZH.

Figures 86 - 89. 86, 87 Heads in frontal view: 86 P. flavofascium female (Brazil MZUSP) 87 P. surinamensis female (paratype) 88, 89 Heads in lateral view: 88 P. flavofascium female (Brazil MZUSP) 89 P. surinamensis female (paratype).

Figures 90 - 96. 90, 91 Scutellum: 90 P. flavofascium male (holotype) 91 P. surinamensis male (holotype) 92 - 96 Mesonotum: 92 P. flavofascium female (Brazil MZUSP) 93 P. surinamensis female (paratype) 94 P. notialus male (holotype) 95 P. ballux male (holotype) 96 P. brevis male (holotype).

Figures 136 - 142. Dorsal habitus of Peradon species (flavofascium group) 136 P. palpator ♂ holotype 137 P. palpator ♀ paratype 138 P. flavofascium ♂ Brazil MZUSP 139 P. surinamensis ♀ paratype 140 P. surinamensis ♂ holotype 141 P. chrysopygus ♂ Costa Rica LACM 142 P. chrysopygus ♀ Costa Rica LACM. Scale bar: 10 mm.

Figures 199 - 205. 199, 200 Peradon flavipennis female, holotype: 199 habitus lateral 200 head frontal 201 - 205 Peradon flavofascium male, holotype: 201 habitus dorsal 202 abdomen dorsal 203 abdomen lateral 204 head frontal 205 head lateral.

Figures 274 - 279. Male genitalia of Peradon species 274 P. luridescens Suriname RMNH 275 P. angustiventris Suriname RMNH 276 P. palpator holotype 277 P. flavofascium holotype 278 P. surinamensis holotype 279 P. notialus holotype.