Thyreodon morosus Smith, 1879:230, ♀. ♀, Costa Rica, Cache (British Museum); Hooker, 1912Hooker, C.W. 1912. The Ichneumon flies of America belonging to the tribe Ophionini. Transactions of the American Entomological Society 38 (1):1-176.:113, Type ♀ (British Museum); Gauld, 1988Gauld, I.D. 1988. A survey of the Ophioninae (Hymenoptera: Ichneumonidae) of tropical Mesoamerica with special reference to the fauna of Costa Rica. Bulletin of the British Museum (Natural History) 57 (1):1-309.:63, Holotype ♀, examined (British Museum (Natural History)); Gauld & Janzen, 2004Gauld, I.D. & D.H. Janzen 2004. The systematics and biology of the Costa Rican species of parasitic wasps in the Thyreodon genus-group (Hymenoptera: Ichneumonidae). Zoological Journal of the Linnean Society 141:297-351.:319, Holotype ♀ (BMNH). - Cameron, 1883-1888Cameron, P. 1883-1888. Biologia Centrali-Americana - Insecta. Hymenoptera. (Families Tenthredinidae-Chrysididae). Taylor and Francis, Red Lion Court, Fleet Street. 487 pp., 20 pl. (distribution), 289 (listed); Dalla Torre, 1901-1902Dalla Torre, C.G. 1901-1902. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus. — Volumen III: Trigonalidae, Megalyridae, Stephanidae, Ichneumonidae, Agriotypidae, Evaniidae, Pelecinidae. Pars II. Breitkopf & Härtel, Leipzig. VIII + 1141. (distribution); Hooker, 1912Hooker, C.W. 1912. The Ichneumon flies of America belonging to the tribe Ophionini. Transactions of the American Entomological Society 38 (1):1-176. (distribution); Morley, 1912Morley, C. 1912. A revision of the Ichneumonidae based on the collection in the British Museum (Natural History) Part I: Tribes Ophionides and Metopiides. British Museum, London, England. 1-88. (distribution); Gauld, 1988Gauld, I.D. 1988. A survey of the Ophioninae (Hymenoptera: Ichneumonidae) of tropical Mesoamerica with special reference to the fauna of Costa Rica. Bulletin of the British Museum (Natural History) 57 (1):1-309. (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); Gauld & Janzen, 2004Gauld, I.D. & D.H. Janzen 2004. The systematics and biology of the Costa Rican species of parasitic wasps in the Thyreodon genus-group (Hymenoptera: Ichneumonidae). Zoological Journal of the Linnean Society 141:297-351. (distribution); Rodríguez-Berrío et al., 2009Rodríguez-Berrío, A. S. Bordera & I. Sääksjärvi 2009. Checklist of Peruvian Ichneumonidae (Insecta, Hymenoptera). Zootaxa 2303:1-4. (distribution); González-Moreno & Bordera, 2012González-Moreno, A. & S. Bordera 2012. The Ichneumonidae (Hymenoptera: Ichneumonoidea) of Ría Lagartos Biosphere Reserve, Yucatán, Mexico. Zootaxa 3230:1-51. (distribution).
Thyreodon pulchricornis Szépligeti, 1906:133, ♂♀.Peru: Marcapata (Ungarische National-Museum); Gauld, 1988Gauld, I.D. 1988. A survey of the Ophioninae (Hymenoptera: Ichneumonidae) of tropical Mesoamerica with special reference to the fauna of Costa Rica. Bulletin of the British Museum (Natural History) 57 (1):1-309.:63, Lectotype ♀ (Természettudományi Muzeum, Budapest, Hungary); Gauld & Janzen, 2004Gauld, I.D. & D.H. Janzen 2004. The systematics and biology of the Costa Rican species of parasitic wasps in the Thyreodon genus-group (Hymenoptera: Ichneumonidae). Zoological Journal of the Linnean Society 141:297-351.:319, Lectotype ♀ (TM). - Gauld, 1988Gauld, I.D. 1988. A survey of the Ophioninae (Hymenoptera: Ichneumonidae) of tropical Mesoamerica with special reference to the fauna of Costa Rica. Bulletin of the British Museum (Natural History) 57 (1):1-309.:63 ( listed as synonym of Thyreodon morosus Smith, 1879); Gauld & Janzen, 2004Gauld, I.D. & D.H. Janzen 2004. The systematics and biology of the Costa Rican species of parasitic wasps in the Thyreodon genus-group (Hymenoptera: Ichneumonidae). Zoological Journal of the Linnean Society 141:297-351.:319 ( listed as synonym of Thyreodon morosus Smith, 1879); Rodríguez-Berrío et al., 2009Rodríguez-Berrío, A. S. Bordera & I. Sääksjärvi 2009. Checklist of Peruvian Ichneumonidae (Insecta, Hymenoptera). Zootaxa 2303:1-4.:31 ( listed as synonym of Thyreodon morosus Smith, 1879).