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) .