Eurytenes Wesmael

Wharton, Robert, Ward, Lauren & Miko, Istvan, 2012, New neotropical species of Opiinae (Hymenoptera, Braconidae) reared from fruit-infesting and leaf-mining Tephritidae (Diptera) with comments on the Diachasmimorpha mexicana species group and the genera Lorenzopius and Tubiformopius, ZooKeys 243, pp. 27-82 : 51

Eurytenes Wesmael http://species-id.net/wiki/Eurytenes

Eurytenes ( Stigmatopoea Fischer)

Opius ( Stigmatopoea Fischer, 1986: 609-611). Type species: Opius macrocerus Thomson, 1895. Original designation.

Eurytenes ( Stigmatopoea ): Wharton 1988: 357 (revised status); Fischer 1998: 21-25 (subgeneric keys, diagnoses); Walker and Wharton 2011: 24 (review of classification).

Xynobius ( Stigmatopoea ): van Achterberg 2004: 314-315 (revised status, subgeneric keys).

Eurytenes ( Xynobius ): Wharton 2006: 330-333 (revised status, relationships).

Diagnosis.

Mandible without basal lobe ventrally. Labrum broadly exposed. Occipital carina broadly absent dorsally, present laterally. Propleuron ventral-laterally without oblique carina. Notauli deep, well developed anteriorly, varying posteriorly from largely absent to deep and extending to scuto-scutellar sulcus or nearly so; midpit present. Fore wing stigma long, narrow, parallel-sided, discrete posteriorly, r1 arising distinctly basad its midpoint; second submarginal cell with 2RS shorter than 3RSb; 2CUb arising above middle of hind margin of first subdiscal cell. Dorsope present; S1 0.2-0.3 × length of T1, never fused to T1.

Remarks.

The new species described below have been placed in Eurytenes ( Stigmatopoea ) based on the relative length of S1 (Figs. 5, 7) and the specific characteristics of T1 (Figs 5, 7, 54, 56, 57), wing venation (Fig. 64), mesoscutal sculpture (Figs 44, 48, 49), clypeus (Figs 50-53), and mandibles (Figs 50, 51) listed in the diagnosis. The wing venation is similar to that in Lorenzopius but in Lorenzopius , the dorsope is absent and S1 is longer and apparently fused to T1 (Fig. 6). We follow Wharton (1988, 2006) and Fischer (1998) in treating Stigmatopoea as a subgenus of Eurytenes . Wharton (2006) provides a detailed explanation of the morphological basis for this treatment as well as a discussion of alternative classifications.

Aulonotus Ashmead has usually been characterized on the basis of well-developed notauli ( Fischer 1972, 1998), similar to the condition found in the species described below. Aulonotus shares other similarities with Stigmatopoea , including the presence of a dorsope, but the petiole is broader, S1 is very poorly developed, the stigma is not parallel-sided, and the precoxal sulcus is distinctly sculptured. Both the type species of Stigmatopoea and the two species described here will key to Opius ( Nosopoea Foerster) in Fischer’s classification of Opiinae ( Fischer 1972, 1977) because the precoxal sulcus is unsculptured in nearly all individuals (as in Figs 43, 44). Difficulties in interpreting the variable nature of sculpture in the precoxal sulcus, and the emphasis placed on this character in existing keys to Opiinae , make it possible for relatively closely related species to become widely separated in current classifications.