Eurytoma annilai, HEDQVIST, 1974

Delvare, Gérard, Gebiola, Marco, Zeiri, Asma & Garonna, A. P., 2014, Revision and phylogeny of the European species of the Eurytoma morio species group (Hymenoptera: Eurytomidae), parasitoids of bark and wood boring beetles, Zoological Journal of the Linnean Society 171 (2), pp. 370-421 : 386-388

EURYTOMA ANNILAI HEDQVIST, 1974 ( FIG. 12A–H )

Eurytoma annilai Hedqvist, 1974: 28–30 . Original description. Finland.

Host: Pissodes validirostris (Sahlberg, 1834) (Curculionidae) . Zerova, 1995: 156; Zerova, 2010: 62.

Eurytoma waachtli Mayr, 1878 [sic]: Roques, 1976: 289–295. France.

Host: Pissodes validirostris in cones of Pinus sylvestris .

Type material

Paratype ♀ (in BMNH). For the labelling, see Figure 9E .

Remarks

Eurytoma annilai was included in the rosae species group by Zerova (2010: 62).

Diagnosis

The species is very similar to E. arctica . The female differs from it mostly by the characters given in the key above: eye relatively large, eye height 1.25 times width of malar space. Temples 0.27 times length of eye and angulate with occiput. Lateral ocellus diameter almost as large as OOL (103: 115). Notauli broad but hardly impressed, obliterated by the sculpture of the mesoscutum and appearing crenulate. Gaster relatively shorter than that of E. arctica . The male has scape completely black, all funicular segments strongly asymmetric, nodiform, and with an apical peduncle, the propodeum shows a deep and crenulate median channel, the median crest being short and irregular, the pilosity of the forewing is white.

Hosts and biology

The species has been reared only from Pissodes validirostris (Sahlberg, 1834) , infesting the cones of various Pinus . Roques (1976), under E. waachtli , described the oviposition behaviour and specified the host stage, which is always the fourth instar. Females oviposit only on larvae of Pissodes that have previously been parasitized by Scambus sp. ( Hymenoptera : Ichneumonidae ). Trials to rear E. annilai from unparasitized larvae of P. validirostris failed. When emerging, the first instar larva of E. annilai kills the larva of Scambus and then feeds on that of Pissodes . Roques (1976) also showed a tight relationship between the life cycle of Scambus sp. and E. annilai , with overwintering adults of Eurytoma emerging a short time after those of Scambus . We examined voucher specimens reared by A. Roques and they appear to be the same as the paratype of E. annilai .

Distribution

The species is known only from Finland and France, but is probably more widely distributed (see Appendix S4 and Fig. S 10 in Appendix S8).

Figures

Figure 9. A–I, labelling of some types. A, lectotype ♀ of Eurytoma arctica Thomson, 1875; B, lectotype ♀ of Eurytoma umbilicata Thomson, 1876; C, holotype ♀ of Eurytoma blastophagi Hedqvist, 1963; D, holotype ♀ of Eurytoma fraxinicola Hedqvist, 1963; E, paratype ♀ of Eurytoma annilai Hedqvist, 1974; F, holotype ♀ of Eurytoma kangasi Hedqvist, 1966; G, paratype ♀ of Eurytoma kangasi Hedqvist, 1966; H, allotype ♂ of Eurytoma kangasi Hedqvist, 1966; I, holotype ♀ of Eurytoma kemalpasensis Narendran, Tezcan & Civelek, 1995.

Figure 10. A–D, Eurytoma afra: A–C, female; D, male. A, head in frontal view; B, head and pronotum in lateral view; C, head and mesosoma in dorsal view; D, antenna.

Figure 12. A–H, Eurytoma annilai. A–G, female; H, male. A, head in frontal view; B, antenna; C, mesosoma in dorsal view; D, mesoscutum in anterolateral view; E, propodeum; F, mesopleuron; G, gaster in lateral view; H, forewing.