Torymus geranii ( Walker, 1833 )

Matsuo, Kazunori, 2020, A revision of Japanese Torymus Dalman (Hymenoptera: Torymidae), Zootaxa 4758 (3), pp. 401-441 : 419

Torymus geranii ( Walker, 1833)

Callimome geranii Walker, 1833: 121 .

Torymus cyniphidum Ratzeburg, 1844: 178 ; Bouček and Graham, 1978: 227 (as junior synonym of Torymus geranii (Walker)) . Torymus geranii (Walker) : Dalla Torre, 1898: 306.

Torymus lusitanicus Tavares, 1901: 45 ; Graham and Gijswijt, 1998: 105 (as junior synonym of Torymus geranii (Walker)) .

Specimens examined. Lectotype: 1 ♀, Callimome geranii , B. M. TYPE HYM. 5. 3924 (BMNH). Paralectotypes: 9 ♀ (BMNH). Other specimens: 1 ♀, emerged on 30 June 1950 from a gall of Biorhiza pallida collected by R. D. Eady on 12 June, 1950 from Worcester Park, SR, England (BMNH); 1 ♂, emerged on 14 March 2010 from galls of Diplolepis mitsukurii on Quercus acutissima collected by K. Matsuo on 21 February 2010 from Dazaifu, Fukuoka, Japan (BLKU); 2 ♀, emerged on 12 May 2008 from galls of Trichagalma serratae on Quercus acutissima collected by Y. Abe, N. Wachi, and K. Matsuo on 8 December 2007 from Chojabaru, Kokonoe, Oita, Japan (BLKU); 2 ♀, emerged on 25 May 2008 from galls of Trichagalma serratae on Quercus acutissima collected by Y. Abe, N. Wachi, and K. Matsuo on 11 May 2008 from Jizoubaru, Kokonoe, Oita, Japan (BLKU); 1 ♀, emerged on 15 October 2007 from a gall of Trichagalma serratae on Quercus acutissima collected by A. Kawamoto, A. Yokota, and K. Matsuo on 29 September 2007 from Tano, Kokonoe, Oita, Japan (BLKU); 1 ♀, emerged on 21 October 2007 from a gall of Trichagalma serratae on Quercus acutissima collected by A. Kawamoto, A. Yokota, and K. Matsuo on 29 September 2007 from Tano, Kokonoe, Oita, Japan (BLKU); 1 ♂, emerged on 5 April 2007 from a gall of Trichagalma serratae on Quercus acutissima collected by S. Sato on 4 March 2007 from Chojabaru, Kokonoe, Oita, Japan (BLKU).

Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu); Palearctic.

Host information. Torymus geranii is an ectoparasitoid of various cynipid wasps ( Hymenoptera : Cynipidae ) that induce galls on Quercus species ( Fagaceae ) ( Graham & Gijswijt 1998; Noyes 2019). In Japan, this species was reared from Biorhiza nawai (Ashmead) on Q. crispula Blume and Q. dentata Thunb. (gall photo: fig. 26g, C–134 of Yukawa & Masuda 1996), Trichagalma serratae (Ashmead) on Q. dentata (gall photo: fig. 26f, C–073 of Yukawa & Masuda 1996), Cynips sp. on Q. dentata , Neuroterus sp. on Q. serrata Murray , Dryocosmus kuriphilus Yasumatsu on Castanea crenata Siebold et Zucc. (gall photo: fig. 26d, C–106 of Yukawa & Masuda 1996) and Diplolepis mitsukurii (Ashmead) on Q. acutissima Carruth (gall photo: C–090 of Yukawa & Masuda 1996). Diplolepis mitsukurii was newly recorded as a host insect of T. geranii .