Ormyrus orientalis Walker, 1871

Gomez, Jose F., Nieves, Maria Hernandez, Gayubo, Severiano F. & Nieves-Aldrey, Jose Luis, 2017, Terminal-instar larval systematics and biology of west European species of Ormyridae associated with insect galls (Hymenoptera, Chalcidoidea), ZooKeys 644, pp. 51-88 : 63-64

Ormyrus orientalis Walker, 1871

Material examined.

ex gall of an undetermined Tephritidae ( Diptera ) on Microlonchus salmanticus , Spain, Salamanca: La Flecha (23/X/02), J. L. Nieves leg (n = 1).

Description.

n = 1; Body length: 2.35 mm, width: 1.35 mm

Body fusiform, short and wide, slightly wider at the level of ABS2-ABS3, but not tapering abruptly towards ANS (Fig. 3F) (Table 2); body segments with conspicuous blister-like sculpture; thoracic setae relatively long, clearly shorter than abdominal setae. Head 1.14 as wide as high (Fig. 7F); face integument smooth; medial area of vertex regularly convex; antennae situated at mid distance among vertex and ventral margin of clypeus; ratio AC/AV 1.22; am situated at the same level of antennae; antennal setae 0.4 as long as distance among antennae (Table 2).

On clypeus lcs situated at the same level of cs, both equal in length (Fig. 9F); lateral lobes of labrum inconspicuous and almost fused with the medial lobe; posterior margin of the medial piece of labrum straight; mandibles unidentated with the apex of tooth acute (Table 2).

Biology.

In contrast to most European species of Ormyrus , the larvae of Ormyrus orientalis attack dipteran galls induced by tephritids ( Diptera , Tephritidae ) in the heads of different species of Asteraceae . On the Iberian Peninsula, tephritid galls containing Ormyrus orientalis were found on Microlonchus salmanticus ( Asteraceae ) (Fig. 13I), and the species was also reared from galls of Myopites limbardae Schiner ( Tephritidae ) on Inula viscosa ( Asteraceae ) (Fig. 13G and H). Based on our unpublished data from Malaise traps and sweep net samples, Ormyrus orientalis was one of the most abundant ormyrid species in many habitats on the Iberian Peninsula; consequently, the list of hosts could be wider than that reported in the literature and in the data of the authors.