Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Dicnemon Schwägr.)
Dicnemon semicryptum Müll. Hal.
Doubtful according to GBIF classification (Possible variant of Dicnemon semicryptum C.Müller, 1897)
Dicnemon spathoideum Duby
Doubtful according to GBIF classification (Possible variant of Dicnemon spathoideum Duby ex Bescherelle, 1873)
Synodontia cuspidata (Besch.) Broth.
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Synodontia (Duby ex Bescherelle) V.F.Brotherus, 1901)
Synodontia pancheri (Besch.) Broth.
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Synodontia pancheri var. sericea (Besch.) Paris)
Synodontia planifolia (Besch.) Broth.
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Synodontia (Duby ex Bescherelle) V.F.Brotherus, 1901)
Synodontia spathoidea (Duby ex Besch.) Duby ex Broth.
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Synodontia (Duby ex Bescherelle) V.F.Brotherus, 1901)