Anasimyia transfuga

Anasimyia transfuga is a Palearctic species of hoverfly.^[1][2]

Anasimyia transfuga
Netherlands
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Diptera
Family:	Syrphidae
Genus:	Anasimyia
Species:	A. transfuga
Binomial name
Anasimyia transfuga (Linnaeus, 1758)

Description

External images For terms see Morphology of Diptera
The wing length 6-8·25 mm. Dark ground colour with steeply inclined hooked markings (the inner limb is strongly oblique). Very similar to A. contracta, but transfuga has the lateral margins of tergite 2 less concave than in contracta. There are also differences in the grey dusting of the sternites (sternites 2 and 3 are completely grey dusted in the male of transfuga).^[3]

Keys and accounts

• Coe R.L. (1953) Syrphidae^[4]
• Van Veen, M. (2004) Hoverflies of Northwest Europe^[5]
• Van der Goot, V.S. (1981) De zweefvliegen van Noordwest - Europa en Europees Rusland, in het bijzonder van de Benelux^[6]
• Bei-Bienko, G.Y. & Steyskal, G.C. (1988) Keys to USSR insects. Diptera^[7]

Habits

A wetland species found on tall emergent pond side vegetation, margins of mesotrophic pools and lakes with Scirpus or Sparganium. Flowers visited include Caltha palustris, Ranunculus repens, white umbellifers, Sonchus arvensis, Sorbus aucuparia and Taraxacum. Flies early May to July. The larva is aquatic and microphagous in rotting plant debris.^[8] Flies April to October.^[9]

Distribution

A Palearctic species with a wide distribution in Europe^[10] East to Siberia.^[11]