Revision of the Neotropical hoverfly genus Peradon Reemer (Diptera, Syrphidae, Microdontinae) Author Reemer, Menno Author Skevington, Jeffrey H. Author Kelso, Scott text ZooKeys 2019 896 1 93 http://dx.doi.org/10.3897/zookeys.896.36493 journal article http://dx.doi.org/10.3897/zookeys.896.36493 1313-2970-896-1 3E0BC795B569442AAE6FDFD4A9FB9534 45D554E9BC5451AA8EFF6B8A14862ADC Peradon trivittatus (Curran) Figs 15 , 24 , 26 , 97 , 98 , 255 , 260 Microdon trivittatus Curran, 1925: 344. Holotype ♂: Guyana (AMNH) [examined]; Thompson et al. 1976 : 67. Peradon trivittatus (Curran): Reemer and Stahls 2013a : 146; Reemer 2014 : 46. Studied type specimens. Guyana • 1 ♂, holotype of Microdon trivittatus Curran; Kartabo; AMNH. Additional specimens. Brazil • 1 ♀; Ouro Puerto[?]; 20 Jun. 1978; E.M. Bratel leg.; NHMUK • 1 ♂; Amazonas, Rio Jau, Meriti, Mun. Novo Airao; 4-10 Jun. 1994; J.A. Rafael leg.; INPA • 1 ♂'; Am. Manaus ZF-03, BR174 km 41 Res. 1501; 02°27'26"S , 59°45'00"W ; 17-31 Jan. 1996; L.E.F. Roche e Silva leg.; INPA • 1 ♂; Am. Manaus, Res. Biol. do Cueiras (ZF-2), km-34, trilha em frente ao LBA; 02°35'37"S , 60°12'39"W ; 22 Jul. 2012; G.F.G. Miranda leg.; INPA • 1 ♂; Amazonas, Reserva Ducke, 26 km N. of Manaus; 24 Sep. 1982; J.A. Rafael leg.; INPA • 1 ♂; Am. Borba, Rio Abacaxis, Paxiuba ; 04°28'48"S , 58°34'24"W ; 2-4 Jun. 2008; J.A. Rafael leg.; INPA • 1 ♂; Amazonas, Florest Canutama, Terra Firme; 7 May 2013; 6.5069S , 64.5515W ; Oliveira & Somavilla leg.; INPA • 1 ♀; Am. Manaus, AM010, km 54 B12; 02°45'22"S , 51°31'03"W ; 22-31 Sep. 1997; INPA • 1 ♀; Amazonas, Manaus; 30 Nov.1981; J.A. Rafael leg.; INPA. Colombia • 1 ♂; Letitia, Amazonas Pr.; 185 m a.s.l.; 19-26 Feb. 1972; D. Ward & A. Forsyth leg.; CNC [BOLD barcode specimen CNCDB1893-11] • 1 ♂; Vaupes, Miraflores; 31 Jan. -5 Feb.1972; M. Cooper leg; NHMUK • 1 ♂ 1 ♀ ("in cop."); Meta, La Macarena; 29 Oct. -7 Nov. 1976; M. Cooper leg.; NHMUK. French Guiana • 1 ♂; Charvein; 1914; R. Benoist leg.; MNHN • 1 ♂; Roura, Kaw Road, PK 37, Relais Patawa; 4°32'42"N , 52°9'9"W ; Jan. 2008; J.A. Cerda leg.; RMNH • 1 ♀; Roura, Kaw Road, PK 37, Relais Patawa; 4°32'42"N , 52°9'9"W ; Jul. 2009; J.A. Cerda leg.; RMNH. Suriname • 1 ♂; Brownsberg; 3 Apr. 2006; M. Reemer leg.; RMNH • 1 ♂; Carolinakreek; 30 Apr. 1962; P.H. van Doesburg Jr. leg.; RMNH • 1 ♀; Perica; 11-25 Jun. 1997; B. De Dijn leg.; RMNH • 1 ♂; Raleigh Falls; 11 Jul. 1963; P.H. van Doesburg Jr. leg.; RMNH. Guyana • 1 ♂; Mazaruni-Potaro District, Takutu Mountains; 6°15'N , 59°5'W ; 6 Dec. 1983; W.E. Steiner leg.; USNM. Peru • 1 ♂; Pucallpa; 17 Jan. 1964; J. Schunke leg.; NHMUK • 1 ♂; SAM: around San Roque de Cumbaza; 6°23'4.96"S , 76°25'53.47"W ; 15-31 Jan. 2015; T. Faasen leg.; RMNH (DNA voucher CNC464837). Suriname • 1 ♂; Carolinakreek; 30 Apr. 1962; P.H. van Doesburg Jr. leg.; RMNH • 1 ♂; Raleigh Falls; 11 Jul. 1963; P.H. van Doesburg leg.; RMNH • 1 ♂; Raleigh Vallen-Voltzberg res.; 90 m a.s.l.; 29 Jan- 13 Feb. 1982; J. Carpenter & D. Trail leg.; USNM • 1 ♀; Perica; 11-25 Jun. 1997; B. De Dijn leg.; RMNH • 1 ♂; Brownsberg; 3 Apr. 2006; M. Reemer leg.; RMNH. Venezuela • 3 ♂; T.F. Zmaz., Cerro de la Neblina, basecamp; 140 m a.s.l.; 0°50'N , 66°10'W ; 10-20 Feb. 1985; P.J. & P.M. Spangler, R.A. Faitoute & W.E. Steiner leg.; USNM. Diagnosis. Body size: male 7-13 mm, female 9-14 mm. The triangle of golden pile on the mesoscutum place this species in a group together with P. aureus , P. aureoscutus and P. trilinea . From the first two species, P. trivittatus differs by the presence of golden pile along the anterior and lateral margins of the mesoscutum. The male differs from P. trilinea by tergite 2 being widened posteriorly (parallel-sided in P. trilinea ), and by sternite 4 being evenly convex and short pilose (with bulge-like, long pilose tubercle in P. trilinea ). Male genitalia as in Fig. 260 . The female differs from P. trilinea by sternite 3 being more or less flat and only narrowly separated from sternite 4 (instead of strongly arched and with wide intermediate membrane in P. trilinea ). Notes. Body size variation is considerable in this species. The smallest males (known from Venezuela and the Brazilian state of Amazonas) measure only 7 or 8 mm, which at first sight gives the impression that they belong to a different species. However, many intermediates occur between these 'dwarfs' and the largest specimens, and all specimens are very similar in morphology and colouration. Distribution. Known from Amazonian parts of Brazil, Colombia, Peru, Suriname, and Venezuela.