Eurytoma robusta Mayr, 1878
publication ID |
https://doi.org/ 10.5252/z2011n3a3 |
persistent identifier |
https://treatment.plazi.org/id/03E487A7-AF52-2765-05FB-FF136BC1FDC8 |
treatment provided by |
Felipe |
scientific name |
Eurytoma robusta Mayr, 1878 |
status |
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Eurytoma robusta Mayr, 1878 View in CoL
MATERIAL EXAMINED. — Ex Isocolus scabiosae form rogenhoferi : Spain. Guadalajara, Pozo de Guadalajara, 3.X.2004, J. L. Nieves leg (n = 1).
DESCRIPTION
n = 1; body length 2 mm; body width 1.2 mm ( Figs 5G View FIG ; 7G View FIG ); body short and wide; ratio L/W = 1.38; ventral margin of body segments convex; anterodorsal protuberances present from second thoracic segment to the seventh abdominal and not protruding beyond the dorsal margin of body segments ( Fig. 7G View FIG ).
Antero-medial setae of the antennal area situated slightly below the antennae; antero-medial setae of vertex relatively high on the upper face, closer to the anterior margin of vertex than to the antennae ( Fig. 9F View FIG ); ratios SA/LAA = 0.29 and SA/DAV = 1.18; dorsal-labral setae as long as clypeal setae; ventral margin of clypeus indistinct; labrum with slight divisions limited to apical part of labrum; the five medial lobes are not well differentiated; maxillary palps conspicuous ( Fig. 12A View FIG ).
Mandibles with two teeth, exposed in part, with the tip of the first tooth visible ( Fig. 12A View FIG ); ratio L/W 1T = 2.08; outer margin of first tooth strongly convex; its tip moderately recurved; apex of the second tooth straight, directed upwards in the same direction as the first tooth, and more or less acute; inner margin of mandible, from the base of second tooth, more or less straight and not interrupted ( Fig. 13G View FIG ).
BIOLOGY
This species has been recorded as a common ectoparasitoid of some galling tephritid fly species in heads of Centaurea and stems of Cirsium (Asteraceae) . It is not clear whether it is a parasitoid of the cynipid gall species Isocolus scabiosae (Giraud, 1859) form rogenhoferi Wachtl, 1880 as well, which occupies similar habitats. We have reared this species from heads of Centaurea scabiosa L. ( Fig. 14J View FIG ) containing both cynipid and tephritid galls. Varley (1937) describes E. robusta as being partially phytophagous after consuming the host larva. Johannesen & Seitz (2003) also studied larval distributions of Eurytoma robusta in galls of the tephritid gall fly Urophora cardui Linnaeus, 1758 .
REMARKS
Eurytoma robusta is one of the few eurytomid species associated with cynipid communities whose larva has already been thoroughly described, by Varley (1937). Our diagnosis provides additional data.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.