Species Accounts

Gymnosoma rotundatum (Linnaeus, 1758)

Synonymsrotundatum (Linnaeus, 1758 - Musca) [=cerinum (Harris, [1776] - Musca)]
Comments8mm, black&orange phasiine, petiolate vein-m
Shaw & Ford (1991)-
Belshaw (1993)The egg is laid on the fourth- or fifth-instar nymph or adult host. Overwinters as a larva within the host, leaving to pupate in the ground. Hosts: Palomena spp (Hemiptera: Pentatomidae), also many old and question-able records from other Pentatomidae. No British records. British distribution: S.England (London and Kent*; numerous records from Surrey and Sussex) and Ireland (Cork and Kerry*). Habitat: dry sandy areas on downland and heathland with isolated shrubs (Falk, in press). Flight period: early June to early September (14 records).
Tschorsnig & Herting (1994)[rotundata]. Europe to Scandinavia; NS NW HE RP BW BY NB / A CH. Meadows forest edges. Early May to Mid October (especially End July to Mid August). Visits flowers; in warmer Central Europe often very frequent. Pentatomidae; however most data are old and can refers to other species of Gymnosoma.
JNCC review (1996)DISTRIBUTION Many records from Sussex and Surrey, but elsewhere only recorded from Kent (Lydden Hill, 1985) and Middlesex (North London, Hampstead Heath). HABITAT Dry, sandy areas on downland and heathland with isolated shrubs. ECOLOGY The larvae are parasitoids of Shieldbugs of the genus Palomena (Hemiptera, Pentatomidae), which are commonly found on Hazel and other trees and shrubs. Adults from June to September. STATUS Regularly found at about a dozen localities in Surrey and Sussex, and locally frequent. It is a distinctive species and unlikely to be overlooked, and now appears to be restricted to these two counties although the Hampshire Downs and parts of Kent would also appear to be suitable. Status revised from VULNERABLE (Shirt 1987). THREAT Changes in the grazing management of the habitat with resultant scrub, Bracken or Pine invasion and a reduction in the floristic richness and diversity; also the encroachment of intensive agriculture and forestry. MANAGEMENT Maintain a mosaic of vegetation types using rotational grazing, burning or mowing if necessary and ensure the presence of shrubs or bushes.
Shaw & Ford (2000)-
NBN code NBNSYS0000030030 BRC code 11402
StatusRDB3 BENHS drawer5.3 10
* mapping provided courtesy of the National Biodiversity Network (NBN); all other content is copyright Chris Raper and respective authors/creators.

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