Abstract
Calcareous sponges have a skeleton formed of spicules of calcium carbonate laid down as calcite. These spicules may be free in the sponge tissue, or may be in part fused together by secondary deposits of calcite and in part free, or may occur as free elements together with a reticulate or massive skeleton of crystalline calcite. The spicules are monactinal, diactinal, triactinal and tetractinal and do not in general occur in categories marked by distinct size differences as is true of the megascleres and microscleres of demosponges and hexactinellids.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.