Ichneumon pennator Fabricius, 1793:155, no.Georgia Americae (Mus. Dom. Olivier). - As Trogus pennator: - Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 1. Symphyta and Apocrita (Parasitica). Smithsonian Institution Press, Washington D.C. 1-1198. (distribution); Ruíz-Cancino et al., 2002Ruíz-Cancino, E., D.R. Kasparyan & J.M. Coronado Blanco 2002. Ichneumonidae. In: Llorente Bousquets, J. & J.J. Morrone (Ed.). Biodiversidad, taxonomía y biogeografía de artrópodos de México: Hacia una síntesis de su conocimiento, volumen III. 631-646. (distribution); Wahl & Sime, 2006Wahl, D.B. & K.R. Sime 2006. A revision of the genus Trogus (Hymenoptera: Ichneumonidae, Ichneumoninae). Systematic Entomology 31:584-610. (distribution), 599 (listed).
Ichneumon asteriae Jaeger, 1859:240 - Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 1. Symphyta and Apocrita (Parasitica). Smithsonian Institution Press, Washington D.C. 1-1198.:539 ( listed as synonym of Trogus pennator (Fabricius, 1793)).
Macrojoppa californica Cameron, 1911:35 - Morley, 1915Morley, C. 1915. A revision of the Ichneumonidae based on the collection in the British Museum (Natural History) with descriptions of new genera and species. Part IV: Tribes Joppides, Banchides and Alomyides. British Museum, London, England. 1-167.:66 ( listed as synonym of Dinotomus vulpinus (Gravenhorst, 1829)); Hopper, 1939Hopper, H.P. 1939. A synoptical revision of the tribe Trogini Ashmead of the United States and Canada (Hymenoptera: Ichneumonidae). Transactions of the American Entomological Society 65 (4):307-346.:318 ( listed as synonym of Trogus vulpinus Gravenhorst, 1829); Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 1. Symphyta and Apocrita (Parasitica). Smithsonian Institution Press, Washington D.C. 1-1198.:539 ( listed as synonym of Trogus pennator (Fabricius, 1793)).