Johnson Paul J, Yefremova Zoya A, Manuel Juan, LÓpez Perilla, Yegorenkova Ekaterina N
Insect Biodiversity Lab, South Dakota State University, Brookings, South Dakota 57007, U.S.A.
Zootaxa. 2018 Nov 9;4514(4):473-486. doi: 10.11646/zootaxa.4514.4.2.
Aprostocetus chilophagae Yefremova and Yegorenkova, new species (Hymenoptera: Eulophidae: Tetrastichinae) is described from eastern South Dakota, U.S.A., and is reported as a parasitoid of the larva of Chilophaga virgati Gagné (Diptera: Cecidomyiidae), an ovule predator of Panicum virgatum. This new species is separated from sympatric A. bromi (Kostjukov) and A. nebraskensis (Girault) by structural morphology and host associations. Aprostocetus bromi was recently recognized from North America as an introduced species from Russia that is a primary parasitoid of the introduced ovule feeding gall midge Stenodiplosis bromicola Marikovskij and Agafonova (Cecidomyiidae) on the invasive grass Bromus inermis. Aprostocetus nebraskensis is a native species that is known as a parasitoid only from S. wattsi Gagné, also an ovule predator on the native prairie grasses Andropogon girardii, Schizachyrium scoparium, and Sorghastrum nutans. Trichacis rufipes Ashmead (Platygastridae) co-occurs with A. chilophagae new species on C. virgati, and a Centrodora sp. (Aphelinidae) may be a hyperparasitoid. The females of A. bromi and A. nebraskensis are redescribed and the males for each species are described for the first time.
描述了来自美国南达科他州东部的嗜食叶瘿蜂阿普罗斯托塞图斯（Aprostocetus chilophagae Yefremova and Yegorenkova）新物种（膜翅目：姬小蜂科：四节小蜂亚科），并报道其为食叶瘿蚊（Chilophaga virgati Gagné，双翅目：瘿蚊科）幼虫的寄生蜂，食叶瘿蚊是柳枝稷（Panicum virgatum）胚珠的捕食者。该新物种通过结构形态和寄主关联与同域分布的溴阿普罗斯托塞图斯（A. bromi (Kostjukov)）和内布拉斯加阿普罗斯托塞图斯（A. nebraskensis (Girault)）相区分。溴阿普罗斯托塞图斯最近在北美被确认为从俄罗斯引入的物种，是入侵草无芒雀麦（Bromus inermis）上引入的胚珠取食瘿蚊窄茎瘿蚊（Stenodiplosis bromicola Marikovskij and Agafonova，瘿蚊科）的主要寄生蜂。内布拉斯加阿普罗斯托塞图斯是本地物种，仅已知是瓦氏食叶瘿蚊（S. wattsi Gagné）的寄生蜂，瓦氏食叶瘿蚊也是本地草原草类大须芒草（Andropogon girardii）、裂稃草（Schizachyrium scoparium）和坚轴草（Sorghastrum nutans）胚珠的捕食者。红足毛腹姬小蜂（Trichacis rufipes Ashmead，广腹细蜂科）与嗜食叶瘿蜂新物种共同出现在食叶瘿蚊上，并且一种未知的Centrodora属（蚜小蜂科）可能是重寄生蜂。重新描述了溴阿普罗斯托塞图斯和内布拉斯加阿普罗斯托塞图斯的雌性，并首次描述了每个物种的雄性。
