An annotated checklist of the Diptera of the Galápagos Archipelago (Ecuador) Author Sinclair, Bradley J. 0000-0001-6413-1606 bradley.sinclair@inspection.gc.ca text Zootaxa 2023 2023-05-09 5283 1 1 102 http://dx.doi.org/10.11646/zootaxa.5283.1.1 journal article 30017 10.11646/zootaxa.5283.1.1 02c7ce64-10d5-4a88-9844-0570c9a54e54 1175-5326 7912667 FFACFB44-873F-4C12-90CF-D8442910659A clavatus (Fabricius) Syrphus clavatus Fabricius, 1794: 298 . Baccha clavata : Coquillett 1901a: 374 [records]; Johnson 1924: 88 [records]; Curran 1932: 354 [records]; Curran 1934: 154 [records]; Linsley & Usinger 1966: 168 [checklist]. Pseudodoros clavatus : Thompson et al . 1976: 11 [catalogue]; Linsley 1977: 39 [checklist]; Traveset et al . 2013: 4 [biology]; Sinclair et al . 2016: 88 [review]; Marín-Armijos et al . 2017: 176 [checklist]. Dioprosopa clavata : Kassebeer 2000: 80 [redescription]. Baccha facialis Thomson, 1869: 504 . Williston 1887: 28 [catalogue]; Williston 1888: 270 [as syn. of B. clavata ]. Syrphus albomaculatus Smith , 1877: 84 . Williston 1887: 28 [catalogue]; Curran 1934: 155 [records]; Sinclair et al . 2016: 88 [as syn. of P. clavatus ]. Xanthandrus albomaculatus : Linsley & Usinger 1966: 168 [checklist]. Syrphus smithi Goot, 1964: 215 [new replacement name for S. albomaculatus ]; Sinclair et al . 2016: 88 [as syn. of P. clavatus ]. Xanthandrus smithi : Thompson et al . 1976: 45 [catalogue]; Linsley 1977: 39 [checklist]. Distribution. Cryptogenic. Nearctic, Neotropical; Galápagos: Baltra, Española, Floreana, Genovesa, Isabela, Marchena, Pinta, Rábida, San Cristóbal , Santa Cruz, Santa Fé, Santiago. Remarks. Adults of this species inhabit both arid and humid zones. Larvae were observed feeding upon aphids, which were present on Cryptocarpus pyriformis Kunth (ICCDRS) . It was considered an alien species and an important pollinator on some islands ( Traveset et al . 2013 ). Adults have been collected on the flowers of C. pyriformis ( Hervías-Parejo & Traveset 2018 ) .