Species Accounts

Phasia obesa (Fabricius, 1798)

Synonymsobesa (Fabricius, 1798 - Thereva) [=speciosa Curtis, 1838]
Comments4mm, brown body, no bristles, larger than pusilla with grey dusting. Often found in Ox-eye daisy flowers or when sweeping grassland
Shaw & Ford (1991)-
Belshaw (1993)Hosts: heteropteran bugs (Hemiptera). In Britain Neottiglossa pusilla (Pentatomidae) (Allen, 1963). In Europe single records from Zicrona coerulea (Pentatomidae), Leptopterna dolabrata (Miridae) and the non-British Sehirus melanopterus (H-S.) (Cydnidae), these hosts all associated with grassland. Also questionable single European records (based on immature stages) from Lygus pratensis (Miridae), Beosus manitimus (Lygaeidae) and Myrmus miniformis (Rhopalidae). British distribution: S.England, Midlands (Hereford and Worcs), N.England (York*), N.Scotland and Ireland (Kerry and Waterford). Habitat: found in grassland, scrub and woodland margins (Chandler, pers. comm.) Flight period: early June to late September, peaking August (at least 50 records).
Tschorsnig & Herting (1994)[Allophora]. Europe to Scandinavia; NS NW HE RP BW BY NB / A CH. Dry meadows. Early May to End October (especially Mid July to Mid September). Caught from flowers or in grass; in warmer Central Europe (and in Southern Europe) often very frequent. Neottiglossa pusilla Gm Zicrona caerulea L. (Pentatomidae); Sehirus melanopterus H.-S. (Cydnidae); Myrmus miriformis Fall. (Coreidae); Beosus maritimus Scop. (Lygaeidae); Leptopterna dolabrata L Lygus pratensis L. (Miridae).
JNCC review (1996)-
Shaw & Ford (2000)-
NBN code NBNSYS0000030026 BRC code 11603
StatusLocal BENHS drawer5.4 15
* mapping provided courtesy of the National Biodiversity Network (NBN); all other content is copyright Chris Raper and respective authors/creators.

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