Eurytoma laricis, YANO, 1918

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 : 397-399

EURYTOMA LARICIS YANO, 1918

( FIG. 20A–J )

Eurytoma laricis Yano, 1918: 39–58 . Original description. Japan.

Host plant: Larix leptolepix . Vikberg & Valkeila 1977: 36–39. Finland. Host plant: Larix sibirica Fang, Roques & Sun 1988: 91–98 . North China. Host plant: Larix gmelinii . Grijpma & van de Weerd, 1991: 46–51. The Netherlands. Host plants: Larix decidua and Larix kaempferi .

Eurytoma bouceki Skrzypczynska, 1975a : original description ♀ ♂. Poland.

Host plant: Larix decidua .

= Eurytoma bouceki Skrzypczynska : Zerova, 1995: 154–155.

Type material

Eurytoma laricis . None examined because of a lack of information, especially on the type (s) series of E. laricis . Our interpretation is based on voucher specimens kindly sent to us by A. Roques, who collected it in Northern China from seeds of Larix gmelinii . Eurytoma bouceki . Not examined. Specimens collected in the same region and conditions as for the type species of E. bouceki were kindly sent to us on request by B. Skrzypczynska.

Remarks

The specimens from North China are perfectly identical with those from Poland. The species apparently does not show any intraspecific phenotypic variation within a large distribution range. The synonymy proposed by Zerova is therefore accepted here.

Diagnosis

Body and most appendices entirely black. Head globose in dorsal view and relatively transverse in frontal view. Clypeus weakly emarginate. Lateral outline of gena evidently convex. Lower face sparsely setose, mostly punctured with short radiating ridges and a median subantennal smooth stripe. Funicular segments relatively short, bearing few MPS. Notauli strongly impressed. Anterior outline of mesepisternum straight. Median channel of propodeum not very impressed but clearly differentiated, including complete median ridge. Petiole very short. Gaster high and strongly compressed, 2.0 times as long as high, with ovipositor strongly ascending.

Host plants

Larvae infest the seeds of Larix : undetermined Larix ( Annila, 1975; Zerova, 1978); Larix decidua ( Grijpma & van de Weerd, 1991; Skrzypczynska, 1975a, b); Larix gmelinii ( Fang et al., 1988) ; Larix leptolepis (Lamb.) Carrière, 1856 ( Yano & Koyama, 1918); Larix polonica (Raciborski & Wóycicki) Domin, 1919 ( Skrzypczynska, 1975a, b); and Larix sibirica Ledeb. ( Skrzypczynska, 1975a, b; Vikberg & Valkeila, 1977).

Distribution

Eurytoma laricis has a wide distribution, from the Netherlands ( Grijpma & van de Weerd, 1991) to Poland ( Skrzypczynska, 1975a, b), Finland ( Annila, 1975; Vikberg & Valkeila, 1977), Russia and Mongolia ( Zerova, 1978), Japan ( Yano & Koyama, 1918), and northern China ( Fang et al., 1988) (see Appendix S4 and Fig. S 10 in Appendix S8).

Figures

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 20. A–J, Eurytoma laricis: A–G, female; H–J, male. A, head in dorsal view; B, antenna; C, pro- and mesonotum in dorsal view; D, mesosoma in lateral view; E, propodeum; F, metacoxa; G, gaster in lateral view; H, antenna; I, scape; J, propodeum.