A revision of Japanese Torymus Dalman (Hymenoptera: Torymidae) Author Matsuo, Kazunori text Zootaxa 2020 2020-03-31 4758 3 401 441 journal article 10.11646/zootaxa.4758.3.1 16d9ff47-9a8c-48fc-93be-078030e0ece8 1175-5326 3734584 18E2818F-2248-45A6-AB96-14A41302A727 Torymus nitidulus ( Walker, 1833 ) Callimome nitidulus Walker, 1833: 138 . Torymus pallidicornis Boheman, 1834: 363 ; Grissell, 1995: 285 (as junior synonym of Torymus nitidulus (Walker)) . Callimome nanulus Walker, 1874: 313 ; Graham and Gijswijt, 1998: 126 (as junior synonym of Torymus nitidulus (Walker)) . Torymus nitidulus (Walker) : Grissell, 1995: 285 . Specimens examined. Lectotypes : Callimome annulus : 1 ♀ , collected by F. Walker from Amurland, B. M. TYPE HYM. 5. 32 ( BMNH ); Callimome pallidicornis : 1 ♀ , B. M. TYPE HYM. 5. 1610 ( BMNH ) . Other specimens: 4 ♀ , collected by C. R. Vardy on 28 May 1961 from Romsey , SH, England , B. M. 1961–422 ( BMNH ) ; 1 ♀ , emerged on 16 March 1957 from a seed of Betula platyphylla var. japonica collected by K. Kamijo from Sapporo , Hokkaido , Japan ( HUM ) ; 1 ♀ , emerged on 2 April 1957 from a seed of Betula platyphylla var. japonica collected by K. Kamijo from Sapporo , Hokkaido , Japan ( HUM ) ; 1 ♀ , emerged on 9 April 1957 from a seed of Betula platyphylla var. japonica collected by K. Kamijo from Sapporo , Hokkaido , Japan ( HUM ) ; 5 ♀ , collected by K. Kamijo on 9 May 1962 from Rumoi , Hokkaido , Japan ( HUM ) ; 1 ♀ and 1 ♂ , collected by K. Kamijo in May 1962 from Rumoi , Hokkaido , Japan ( HUM ) . Distribution. Japan ( Hokkaido ); Holarctic. This is a new distributional record of T. nitidulus from Japan . Host information. Torymus nitidulus parasitizes unknown host in seeds of Betula platyphylla Sukaczev var. japonica (Miq.) H. Hara (Betulaceae) in Japan . According to Graham and Gijswijt (1998) , this species is associated with Semudobia spp. ( Diptera : Cecidomyiidae ), gall inducers of Betula (Betulaceae) in Europe.