Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Plectambonites schmidti (Angelin & Lindström, 1880))
Plectambonites sericea conspicua (Reed 1917)
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Plectambonites sericeus Sowerby, 1839)
Plectambonites sericea semirugata (Reed 1917)
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Plectambonites sericeus Sowerby, 1839)
? nuntia Barrande, 1879
Homotypic synonym according to GBIF classification (Originally found in sources as doubtful taxon within Sowerbyellidae)