| spherical |
| pale orange, light brown in preservative |
| small apical oscule |
| firm but compressible, resembles Astrosclera in situ. Not easily torn. |
| Small furrows leading to oscules which form stellate patterns over the surface. membranous, opaque. Irregular surface, microscopically hispid. |
| Plumose spongin fibres cored by smooth rhabdostyles ascend the choanosome and are echinated by large numbers of spined acanthostyles. Collagen is light and homogeneous. |
| Thin oxeas and smooth rhabdostyles lay paratangential to the surface or form brushes which protrude through the surface. Plumose tracts from choanosome penetrate ectosomal layer. |
| Rhabdostyles Oxeas Acanthostyles |
| nil. |
