Torymus cerri ( Mayr, 1874 )

Matsuo, Kazunori, 2020, A revision of Japanese Torymus Dalman (Hymenoptera: Torymidae), Zootaxa 4758 (3), pp. 401-441 : 418

Torymus cerri ( Mayr, 1874)

Syntomaspis cerri Mayr, 1874: 79 .

Callimome cerri (Mayr) : Hoffmeyer, 1930: 236.

Torymus cerri (Mayr) : Graham and Gijswijt, 1998: 73.

Specimens examined. 2 ♀, emerged on 31 March 2008 from galls of Andricus sp. on Quercus serrata collected by M. Shiga on 12 October 2007 from Fujimoto, Tsukuba, Ibaraki (BLKU); 1 ♀ and 6 ♂, emerged on 31 March 2008 from galls of Andricus sp. on Quercus serrata collected by M. Shiga on 18 October 2007 from Fujimoto, Tsukuba, Ibaraki (BLKU); 2 ♀, emerged on 31 March 2008 from galls of Andricus sp. on Quercus serrata collected by M. Shiga on 25 October 2007 from Fujimoto, Tsukuba, Ibaraki (BLKU); 1 ♀, emerged on 4 April 2008 from a gall of Andricus sp. on Quercus serrata collected by M. Shiga on 11 December 2007 from Fujimoto, Tsukuba, Ibaraki (BLKU); 1 ♀ and 1 ♂, collected by K. Kamijo on 7 April 1994 from Higashiyamato, Tokyo, Japan (HUM); 1 ♀, collected by K. Kubo on 5 May 2000 from Yokohama, Kanagawa, Japan (HUM).

Distribution. Japan (Honshu); Palearctic. This is a new distributional record of T. cerri from Japan.

Host information. Torymus cerri is known as a parasitoid of Andricus singularis Mayr ( Hymenoptera : Cynipidae ) and Synophrus politus Hartig ( Hymenoptera : Cynipidae ) in Europe ( Graham & Gijswijt 1998). In Japan, this species parasitizes Andricus sp. ( Hymenoptera : Cynipidae ) that induces galls on Quercus serrata Murray (Fagaceae) (gall photo: fig. 26e, C–145 of Yukawa & Masuda 1996).