References
- Kirby , W. F. 1889 . A revision of the subfamily Libellulinae, with descriptions of new genera and species . Transactions of the Zoological Society of London 12 , 9 ( 1 ) : 249 – 348 .
- Liljedahl , L. 1989 . Fylgia baltica gen. et sp. nov. (Bivalvia, Mollusca) from the Silurian of Gotland . Geologiska Föreningens i Stockholm Förhandlingar , 111 : 339 – 345 .