Hayward, P. J. & Ryland, J. S., 1985. Cyclostome Bryozoans. pp. 1-147. (Kermack, D.M. & Barnes, R.S.K. Synopses of the British Fauna (n.s.), 34). E.J.Brill for the Linnaean Society, London
Johnston G., 1847. A history of British zoophytes. Van Voorst, Second edition, London. pp. vol. 1, pp. i-xvi, 1-488, vol. 2, plates 1-7 
Crisia sigmoidea Waters, 1916
Zabala, M., & Maluquer, P., 1988. Illustrated keys for the classification of Mediterranean Bryozoa. Treballs del Museu de Zoologia, Barcelona, 4: 1-294.
Parasmittina trispinosa (Johnston, 1838)
Hayward, P.J., & Ryland, J.S., 1999. Cheilostomatous Bryozoa. Part 2. Hippothoidea - Celleporoidea. Synopses of the British Fauna (New Series), 14: 1-416, (Barnes, R.S.K., & Crothers, J.H., editors). Field Studies Council, Shrewsbury
Filicrisia geniculata (Milne Edwards, 1838)
Zabala, M., & Maluquer, P., 1988. Illustrated keys for the classification of Mediterranean Bryozoa. Treballs del Museu de Zoologia, Barcelona, 4: 1-294.
Puellina venusta Canu & Bassler, 1925
Hayward, P.J., & Ryland, J.S. 1998. Cheilostomatous Bryozoa. Part 1. Aeteoidea - Cribrilinoidea. Synopses of the British Fauna (new series), No. 10, Barnes, R.S.K., & Crothers, J.H., (editors). Shrewsbury: Field Studies Council
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