| Author | Year | Title | Source | |
|---|---|---|---|---|
 |
Redfern, M. | 1968 | The Natural History of Spear Thistle-heads | Field Studies Vol 2, No 5: 669-717. |
| Varley, G.C. | 1947 | The natural control of population balance in the Knapweed Gall-fly (Urophora jaceana) | Journal of Animal Ecology Vol 16 (2): 139-187. |
Torymus chloromerus (a chalcid wasp) may also be included in identification literature listed under the following higher taxa:
 NBN (data.nbn.org.uk)
has a distribution map for Torymus chloromerus (a chalcid wasp)
|
 BioInfo (www.bioinfo.org.uk)
has 9 host/parasite/foodplant and/or other relationships for Torymus chloromerus (a chalcid wasp)
|
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