Xystus villosus Hartig, 1841:353, Ferrer-Suay et al., 2013Ferrer-Suay, M., J. Selfa & J. Pujade-Villar 2013. Review of the Neotropical Charipinae (Hymenoptera, Cynipoidea, Figitidae). Revista Brasileira de Entomologia 57 (3):279-299.:296, Type (ZSM); Ferrer-Suay et al., 2019Ferrer-Suay, M., J. Selfa, N. Mata-Casanova, N. Pérez Hidalgo & J. Pujade-Villar 2019. Worldwide revision of the genus Phaenoglyphis Förster, 1869 (Hymenoptera, Cynipoidea, Figitidae, Charipinae). Insect Systematics & Evolution 50 (2):235-296.:287, Holotype ♀ (ZSM). - As Phaenoglyphis villosa: - Ferrer-Suay et al., 2013Ferrer-Suay, M., J. Selfa & J. Pujade-Villar 2013. Review of the Neotropical Charipinae (Hymenoptera, Cynipoidea, Figitidae). Revista Brasileira de Entomologia 57 (3):279-299. (distribution); Ferrer-Suay et al., 2013Ferrer-Suay, M., J. Selfa, A. Equihua-Martínez, E. Estrada-Venegas, R. Lomeli-Flores, R. Peña Martínez & J. Pujade-Villar 2013. Charipinae (Hymenoptera: Cynipoidea: Figitidae) from Mexico with description of three new species. Annals of the Entomological Society of America 106 (1):26-41. (distribution).
Phaenoglyphis pecki Andrews, 1978 Synonymized with Phaenoglyphis villosa (Hartig, 1841) by Ferrer-Suay et al., 2019Ferrer-Suay, M., J. Selfa, N. Mata-Casanova, N. Pérez Hidalgo & J. Pujade-Villar 2019. Worldwide revision of the genus Phaenoglyphis Förster, 1869 (Hymenoptera, Cynipoidea, Figitidae, Charipinae). Insect Systematics & Evolution 50 (2):235-296.:286.