Pteromalus isarchus Walker, 1839

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

https://doi.org/ 10.5281/zenodo.280035

DOI

https://doi.org/10.5281/zenodo.5694734

persistent identifier

https://treatment.plazi.org/id/03DD6157-7C08-FFDB-FF2E-C0A6FB5124CA

treatment provided by

Plazi

scientific name

Pteromalus isarchus Walker, 1839
status

 

Pteromalus isarchus Walker, 1839 View in CoL

Measurements. Body length: 1.7–2 (1.8) mm, maximum width: 0.8–1 (0.9) mm (n=4) ex gall Xestophanes potentillae (Retzius) .

Description. body more or less fusiform, tapering slightly anteriorly and gradually posteriorly, widest at middle ( Fig. 4 View FIGURE 4 F).

Head (anterior view) ( Fig. 6 View FIGURE 6 F). Almost hexagonal; antennal area not bulging and relatively conspicuous.

Mouth parts ( Fig. 7 View FIGURE 7 F). Ventral margin of the clypeus curved; labrum more or less trapezoid almost 3.3× wider than long.

Biology. The species P. isarchus is an oligophagous parasitoid of Xestophanes (Cynipidae) galls on Potentilla spp . ( Fig. 9 View FIGURE 9. A C). It is mainly a primary ectoparasitoid of cynipid larvae and in the Palaearctic has been recorded from two different species of Xestophanes (Askew et al. 2006) , although in the Iberian Peninsula it is more commonly found within the parasitoid community of X. potentillae ( Garrido-Torres & Nieves-Aldrey 1990, Gómez et al. 2006).

Material examined. ex gall X. potentillae on Potentilla reptans (Rosaceae) , Spain, Asturias: Ajuyán-Oviedo (07/09/2005) L. Parra leg. (n=3); Tarragona: Colldejou (14/08/2003) J. L. Nieves leg. (n=1).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Pteromalidae

Genus

Pteromalus

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