This class comprises two subclasses, both monophyleticCalcinea Bidder, 1898, and Calcaronea Bidder, 1898which vary by cytological, embryological, skeleton and ontogenetic characteristics

This class comprises two subclasses, both monophyleticCalcinea Bidder, 1898, and Calcaronea Bidder, 1898which vary by cytological, embryological, skeleton and ontogenetic characteristics. a chance to critique the sponge types producing such…