Pteromalus hieracii ( Thomson, 1878 )

Gómez, Jose F. & Nieves-Aldrey, Jose Luis, 2012, Notes on the larval morphology of Pteromalidae (Hymenoptera: Chalcidoidea) species parasitoids of gall wasps (Hymenoptera: Cynipidae) in Europe, Zootaxa 3189, pp. 39-55: 52

publication ID 10.5281/zenodo.280035

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Pteromalus hieracii ( Thomson, 1878 )


Pteromalus hieracii ( Thomson, 1878) 

Measurements. Body length: 1.3–2.3 (1.8) mm, maximum width: 0.5–0.8 (0.6) mm (n= 2) ex gall Aulacidea follioti Barbotin. 

Description. Whitish or yellowish; smaller with body 2.5 × as long as broad ( Fig. 4View FIGURE 4 E).

Head (anterior view) ( Fig. 6View FIGURE 6 E). Regularly rounded, slightly broader than long; vertex clearly incised medially.

Mouth parts ( Fig. 7View FIGURE 7 E). Ventral margin of clypeus straight; labium large and more or less rectangular, 3 × wider than long.

Biology. The species P. hieracii  is a parasitoid of several cynipid galls in Asteraceae  plants such as Hieracium spp  . ( Fig. 9View FIGURE 9. A B). In the Palaearctic region apart from A. follioti  it has been reared from galls of Aulacidea hieracii (Linnaeus)  , Aulacidea tragopogonis (Thomson)  , Isocolus jaceae (Schenck)  , Isocolus scabiosae (Giraud)  , Phanacis caulicola (Hedicke)  , Phanacis centaureae (Förster)  , Phanacis hypochoeridis (Kieffer)  , Timaspis lampsanae (Perris)  , Timaspis lusitanica Tavares  ; and also from galls of Aylax papaveris (Perris)  on Papaver  spp  . ( Papaveraceae  ) (Askew et al. 2006). It is always a primary ectoparasitoid of the cynipid larvae.

Material examined. ex gall A. follioti  on Sonchus asper  ( Asteraceae  ), France, Pyrénées Atlantiques: Vallée D’Aspe (07/08/ 2003) J. L. Nieves leg. (n= 2).