Petrosina
| Petrosina | |
|---|---|
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| Xestospongia muta | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Porifera |
| Class: | Demospongiae |
| Order: | Haplosclerida |
| Suborder: |
Petrosina Boury-Esnault & Van Beveren, 1982 |
| Families | |
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See text |
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| Synonyms | |
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See text
Petrosina is the name of a suborder of marine haplosclerid sponges. It includes three families.
The Petrosina were first established by Nicole Boury-Esnault and Monique Van Beveren in 1982. They are classified under the order Haplosclerida of the class Demospongiae.
Members of Petrosina are characterized by isotropic skeletons. The spicules are almost always smooth oxeas or strongyles. There is no differentiation between primary and secondary spicule tracts or fibers, and the latter lack orientation.
All members of the suborder are presumed to be oviparous. They are also usually hard or incompressible in consistency. Spicule density is high with little to no spongin present.
These families are classified under Petrosina:
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