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Sphaerophoria retrocurva Hull 1944
urn:lsid:organismnames.com:name:2146901
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58
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Sphaerophoria retrocurva Hull 1944
Hull 1944. Some flies of the family Syrphidae in the British Museum (Natural History). Annals & Magazine of Natural History Series 11, 11 1944: pp. 21-61