Cornish Biodiversity Network  -  Supporting Wildlife Recording

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Cornish Red Data (2009)

The descriptive text, below the map, is from the Cornish Red Data Book (2009). The map on this web page depicts the organisms distribution and shows the records made pre-2000 and those made since.

Cynips disticha

Range & Status

Hymenoptera: Cynipidae; agamic stage rare; sexual stages are also rare but the difference from another species, Cynips divisa , cannot be identified in the field.

Regional Distribution

Two agamic records from the same locality in one 10km square in VC1: SW53 in 1977 and 1984.

Habitat & Ecology

Associated species: Quercus spp. Sexual stage galls in buds or on leaves, agamic stage is a hard, globular gall with depression on top, occurring on the undersurface of the leaf, which has two chambers with larva in the one nearest the point of attachment. Often found on fallen leaves.


The destruction of oak woodlands.

00 Conservation

Planting and protection of oak woodlands.


I.J. Bennallick, S. Board, C.N. French, P.A. Gainey, C. Neil, R. Parslow, A. Spalding and P.E. Tompsett. eds. 2009. Red Data Book for Cornwall and the Isles of Scilly. 2nd Edition.Croceago Press.

The Cornish Red Data Book Project was led by the Cornwall and Isles of Scilly Federation for Biological Recorders (CISFBR). The full text and species accounts (minus the maps) are available on the CISFBR website.