Anthozoa. Polyactinia. Astroides calycularis
Marine Cnidaria with polyps. Polypoid forms with calcareous (aragonite) skeleton, which is secreted by the ectodermic epithelium of the lower half of the polyp column; thus, both in the solitary polyps and in the colonial ones, polyps are partially included in a calcareous cup.
Pfurtscheller, Paul (Author)
Michelon, Nicola (Digitiser)
Castelli, Stefano (Digitiser)
Biblioteca Vallisneri - Università di Padova (Digitiser)
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