Plagiocera apicalis Westwood, 1835:51, sex not indicated.Americâ Meridionali. Rio Janeiro (Mus. Dom. Hope). - Dalla Torre, 1894Dalla Torre, C.G. 1894. Catalogus Hymenopterorum. Vol. I: Tenthredinidae incl. Uroceridae (Phyllophaga & Xylophaga). G. Engelmann, 459. (distribution). - As Pachylosticta apicalis: - Smith, 1988Smith, D.R. 1988. A synopsis of the sawflies (Hymenoptera: Symphyta) of America south of the United States: introduction, Xyelidae, Pamphiliidae, Cimbicidae, Diprionidae, Xiphydriidae, Siricidae, Orussidae, Cephidae. Systematic Entomology 13:205-261. (distribution).
Plagiocera Leachii Spinola, 1840:134, ♀. Holotype ♀, Cayenne (leg. M. Leprieur), Type ♀, examined (Torino), designated by Smith, 1988Smith, D.R. 1988. A synopsis of the sawflies (Hymenoptera: Symphyta) of America south of the United States: introduction, Xyelidae, Pamphiliidae, Cimbicidae, Diprionidae, Xiphydriidae, Siricidae, Orussidae, Cephidae. Systematic Entomology 13:205-261.:219. - Smith, 1988Smith, D.R. 1988. A synopsis of the sawflies (Hymenoptera: Symphyta) of America south of the United States: introduction, Xyelidae, Pamphiliidae, Cimbicidae, Diprionidae, Xiphydriidae, Siricidae, Orussidae, Cephidae. Systematic Entomology 13:205-261.:219 ( listed as synonym of Pachylosticta apicalis (Westwood, 1835)).