Fannia sociella
(Zetterstedt, 1845)
Fannia sociella is a small, slender fly in the Fanniidae, closely resembling the lesser house fly (Fannia canicularis). It is native to the Palearctic region and is notably smaller and more slender than the common house fly (Musca domestica). The is documented from scattered localities including parts of Scandinavia and the Azores.
Pronunciation
How to pronounce Fannia sociella: /ˈfæn.i.ə ˌsoʊ.siˈɛl.lə/
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Identification
Difficult to distinguish from Fannia canicularis based on external appearance alone; both share the slender build typical of Fanniidae. Smaller and more slender than Musca domestica. Accurate identification likely requires examination of male terminalia or other subtle morphological characters.
Images
Appearance
Smaller and more slender than Musca domestica. Overall build delicate with a narrow and . Similar in general appearance to Fannia canicularis, with which it shares the characteristic Fanniidae body plan.
Distribution
Palearctic region. Documented from Denmark, Norway, Sweden, and São Miguel Island in the Azores (Portugal).
Similar Taxa
- Fannia canicularisExtremely similar external ; both are slender Fanniidae of comparable size, requiring detailed examination for reliable separation
- Musca domesticaReadily distinguished by larger size and more robust body build; F. sociella is notably smaller and more slender
More Details
Taxonomic history
Originally described as Aricia sociella by Zetterstedt in 1845 before transfer to Fannia.