Eurytoma nobbei, MAYR, 1878

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 : 404

EURYTOMA NOBBEI MAYR, 1878

( FIG. 24A–F )

Eurytoma nobbei Mayr, 1878: 325 . Original description. Austria.

Host: Rabdophaga (= Cecimomyia) saliciperda (Dufour, 1841) .

= Eurytoma flavimana Boheman, 1836 : Ferrière, 1950: 390 (synonymy erroneous).

Eurytoma nobbei Mayr, 1878 : Graham, 1970: 148. syn. & stat. rev.

Type material

Syntype ♀, labelled ‘ Eur. Nobbei G. Mayr, Type’ (manuscript)/‘ Taken as type Eurytoma nobbei Mayr M.F. Claridge “57” (manuscript)/‘ Collect. G. Mayr’ (in MNHW). Conceptually, this syntype is a lectotype, although the designation was never published by Claridge .

Remarks

Ferrière (1950) synonymized E. nobbei with E. flavimana Boheman, 1836 . This synonymy was challenged by Graham (1970). In 2010 G.D. examined the single type specimen of E. flavimana labelled ‘Sm’ (for Smoland)/ ‘Bhm’ (for Boheman)/‘Thoms.’ (for Thomson)/275 (red label)/‘taken as type Eurytoma flavimana det. Claridge “57” ’ (manuscript). The type agrees with the interpretation of the species by Graham, Boucˇek, Erdös, and Szelényi, according to the specimens identified by these authors. It is indeed different from E. nobbei , although the two species are superficially similar, especially in colour. Eurytoma flavimana is a common species belonging to the appendigaster species group and parasitizing Tetramesa linearis Walker, 1832 on Agropyron sp. (Poaceae) .

Diagnosis

Small species with elongate gaster. Procoxa reddish to brownish, and ovipositor entirely reddish. Femora and tibiae extensively fuscous. Head long and globose, 1.55–1.60 times as wide as long, with very convex frons in dorsal view, subcircular in frontal view, with outline of genae strongly convex. Clypeus somewhat protruding ventrally and slightly emarginate in middle. Lower face with radiating striolation, the sculpture very faint. Eyes small. Vertex coriaceous. OOL about as long as lateral ocelli diameter. Pro- and mesonotum with superficial puncturation. Bottom of lateral prepectus finely reticulate, not well separated from the sublateral prepectus. Metacoxa bare dorsally at base. Setation of lower surface of costal cell as usual, not especially sparse, leaving a broad posterior stripe bare. Marginal vein not widened, 7.70 times as long as wide. Petiole short. Gaster elongate, strongly compressed, its dorsal outline almost straight. Syntergum as long as GT6 on median line. Ovipositor moderately ascending.

Hosts

The type series was reared on Salix sp. with galls of Rabdophaga saliciperda (Dufour, 1841) (Cecidomyiidae) .

Distribution

As far as is known, only reported from Austria.

Figures

Figure 24. A–F, female Eurytoma nobbei: A, head in frontal view; B, head in dorsal view; C, vertex; D, mesosoma in dorsal view; E, prepectus; F, gaster in lateral view.