1881 C. Spence Bate in 8 194 This species has two pleurobranchial plumes attached to the penultimate somite of the pereion.
1893 T. R. R. Stebbing xvi. 218 Sicyonia... In defining the genus Spence Bate says that the second maxillipeds carry a ‘mastigobranchial plate without a podobranchia,’ ‘one arthrobranchial and one pleurobranchial plume.’