Synergus crassicornis (Curtis, 1838)

Pujade-Villar, Juli, Villemant, Claire & Andreï-Ruiz, Marie-Cécile, 2000, Cynipidae associated with Quercus collected in Corsica with the description of a new Plagiotrochus species (Hymenoptera, Cynipoidea), Zoosystema 22 (4), pp. 835-846 : 845

Synergus crassicornis (Curtis, 1838)

MATERIAL EXAMINED. — Vallée du Fango. Yellow pan trap, 7-14.V.1993 (R2/DN/C 2), 1 ♀ (deposited in UB); ( R2 /SE/C 3) , 2 ♀ ♀; 14-21.V.1993 (R3/DN/C 1), 2 ♀ ♀ (1 ♀ deposited in UB) ; 21-28.V.1993 (R4/DN/ C 2), 2 ♀ ♀; (R4/DN/C 3) 1 ♀ .

The rest of material deposited in MNHN.

REMARKS

European species recorded from Andorra, Austria, France, Germany, Great Britain, Hungary, Marrocco, Poland, Portugal, Spain and Ukraine (Nieves-Aldrey & Pujade-Villar in press).

Synergus crassicornis , S. clandestinus and S. dacianus form a group of closely related species named “ evanescens ” by Kierych (1985). While the morphological characters used are not satisfactory, the biological data enable separation of these species (Pujade-Villar in press). Synergus crassicornis was reared from cynipids galls collected on deciduous and evergreen Quercus . However the specimens reared from Q. ilex and Q. coccifera probably do not belong to the same species as those obtained from deciduous Quercus (Nieves- Aldrey & Pujade-Villar 1986; Pujade-Villar 1992), but it is difficult to morphologically differentiate these populations from adult morphology. For this reason we cannot determine whether the Corsican species are likely to have come from deciduous or evergreen Quercus species.