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 macellaria (Fabricius) Musca macellaria Fabricius, 1775: 776 . Cochliomyia macellaria : Johnson 1924: 89 [records]; Curran 1932: 362 [records]; Curran 1934: 166 [records]; Linsley & Usinger 1966: 172 [checklist]; James 1966a: 476 [records]; James 1970: 6 [catalogue]; Linsley 1977: 42 [checklist]; Peck 1996: 122 [mode of introduction]; Peck et al . 1998: 228 [introduced species]; Causton et al . 2006: 133 [introduced species]; Sinclair 2009: 108 [remarks]; Tantawi & Sinclair 2013: 238 [key, records]. Callitroga macellaria : James 1947: 65 [myiasis]. Musca phauda (Walker, 1849: 896) . Johnson 1924: 89 [syn. of C. macellaria ]; Dear 1985: 142 [remarks]. Lucilia quadrisignata Thomson, 1869: 544 . Dear 1985: 143 [remarks]. Chrysomyia quadrisignata : Coquillett 1901a: 375 [records]; Johnson 1924: 89 [syn. of C. macellaria ]. Distribution. Cryptogenic. Neactic, Neotropical; Galápagos: Baltra, Española, Floreana, Genovesa, Isabela, Pinzón, San Cristóbal , Santa Cruz, Santa Fé, Santiago. Remarks. This species is known as the “secondary screw-worm fly” ( Johnson 1924 ). Baumgartner & Greenberg (1984) observed that populations of Co. macellaria were suppressed as populations of Chrysomya albiceps increased in Peru . Throughout the New World, studies have shown that as introduced species of Chrysomya increase, sympatric populations of the native calliphorid Co. macellaria decrease ( Wells & Kurahashi 1997 ). The latter species was first recorded from the islands in 1835 and last collected in 1985 ( Tantawi & Sinclair 2013 ), which overlaps with the first records of Chrysomya .