Peradon aureus (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 aureus (Hull) Figs 14 , 20 , 22 , 102 , 103 , 153-156 , 258

Microdon aureus Hull, 1944b: 35. Holotype ♀: Ecuador (MCZ) [examined]; Thompson et al. 1976: 63.

Peradon aureus (Hull): Reemer and Ståhls 2013a: 146; Marín-Armijos et al. 2017: 175.

Studied type specimens.

Ecuador • 1 ♀, holotype of Microdon aureus Hull; Jatun Yacu, Rio Napu watershed, Oriente; 700 m a.s.l.; Jan.-Jul. 2003; C. McIntyre leg.; MCZ.

Label 1: "Jatun Yacu / Rio Napu / watershed / 700 m"; label 2: "Oriente / Ecuador"; label 3: "Wm. C. / Mcintyre"; label 4 (red): "M.C.Z. / Type / 23807"; label 5: "Microdon aureus Hull n. sp. holotype"; label 6: "Jan.-July 2003 / MCZ Image / database"; label 7: " MCZ-ENT /00023807".

Additional specimens.

Ecuador • 3 ♂; Pompeya, Napo R., Pastaza; 14-22 May 1965; L. Pena leg.; CNC • 1 ♀; Coca, Napo R., Napo; 250 m a.s.l.; May 1965; L. Pena leg.; CNC • 1 ♂; Sucumbios, Sacha Lodge; 00.5S, 76.5W; 290 m a.s.l.; Jul. 1994; P. Hibbs leg.; LACM • 1 ♂; Napo Prov., Limoncocha; 16 Jun. 1977; D.L. Vincent leg.; USNM.

Diagnosis.

Body length: male 11-14 mm, female 16-19.5 mm. The triangle of golden pile on the mesoscutum places this species in a group together with P. aureoscutus , P. trilinea and P. trivittatus . From the latter two species, P. aureus differs by the absence of golden pile along the anterior and lateral margins of the mesoscutum. The species differs from P. aureoscutus in the triangle of golden pile on the mesoscutum being longer than wide and reaching the anterior half of the mesoscutum. In the male, the ratio vertex width:head width is approximately 1:3.3 ( Fig. 14 ), and the lateral margins of tergite 2 are more or less parallel in the anterior half and diverging in the posterior 1/2 to 1/3. The female is figured in Fig. 102 . As the female of P. aureoscutus is unknown, it is uncertain whether the characters described for the males of both species also apply to the females.

Notes.

This taxon is very similar to P. aureoscutus . Although both taxa were described by F.M. Hull, he apparently was unaware of this similarity, as Hull (1944b) only noted that it was 'related distantly to beebei ' (a species nowadays placed in the genus Pseudomicrodon Hull, 1937).

Distribution.

Known only from Ecuador.

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 153 - 156. Peradon aureus female, holotype 153 habitus lateral 154 head frontal 155 head lateral 156 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.