Zabala, M., & Maluquer, P., 1988. Illustrated keys for the classification of Mediterranean Bryozoa. Treballs del Museu de Zoologia, Barcelona, 4: 1-294. 
Pallas, P.S., 1766. Elenchus zoophytorum sistens generum adumbrationes generaliores et specierum cognitarum succintas descriptiones, cum selectis auctorum synonymis. Fransiscum Varrentrapp, Hagae. pp. 451
Umbonula ovicellata (Hastings, 1944)
Hayward, Peter J. & McKinney, Frank K., 2002. Northern Adriatic Bryozoa from the vicinity of Rovinj, Croatia. Bulletin of the American Museum of Natural History 270: 1-139.
Escharina vulgaris (Moll, 1803)
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
Celleporina caminata (Waters, 1879)
Hayward, Peter J. & McKinney, Frank K., 2002. Northern Adriatic Bryozoa from the vicinity of Rovinj, Croatia. Bulletin of the American Museum of Natural History 270: 1-139.
Gregarinidra gregaria (Heller, 1867)
Zabala, M., & Maluquer, P., 1988. Illustrated keys for the classification of Mediterranean Bryozoa. Treballs del Museu de Zoologia, Barcelona, 4: 1-294.
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