3 articles
Clathrina
Clathrina is a genus of small calcareous sponges, established by Gray in 1867, whose bodies are built from an irregular network of anastomosing tubes supported by triactine spicules.
Grantia
Grantia (Fleming, 1828) is a genus of small calcareous sponges in family Grantiidae, class Calcarea, with type species Grantia compressa; a textbook example of the syconoid canal system, distinct from the homonymous plant genus in Asteraceae.
Sycon
Sycon (synonym Scypha) is a genus of small calcareous sponges in the family Sycettidae, called urn or crown sponges; ICZN Opinion 2521 conserved Sycon over the older Scypha Gray, 1821.