Thursday, May 25, 2017

Septocostae


Where corallite walls are absent or indistinct, the distinction between septa and costae is lost and they become known as septocostae (singular is septocosta).  Throughout the Coral Finder, you will see septocostae described as flowing between corallites (e.g. Pavona, p.20 of the Coral Finder).  Members of the Siderastreidae have septocostae that are granular, giving a granular texture to the colony surface (e.g. Psammocora, p.28 of the Coral Finder)

When the corallite wall is absent the distinction between septa and costae is lost and the structures that flow between corallites are known as septocostae - the genus Pavona.