CLASSIFICATION OF CHONDRILLA
PHYLUM :- PORIFERA (Pore bearing, cellular grade, asymmetrical or radially symmetrical.)
CLASS :- DEMOSPONGIAE (Skeleton of spongin fibres or siliceous spicules which are not six-rayed.)
ORDER :- TETRACTINELLIDA (Spicules tetraxon.)
GENUS :- Chondrilla
Found in British waters and U.S.A.
HABIT AND HABITAT
Chondrilla is a marine tetractinellid demosponge.
GENERAL CHARACTERSTICS OF CHONDRILLA
- Entire sponge body looks like a rounded mass attached to substratum.
- Free surface contains few oscula, while rest of the body is perforated by several pores.
- Body surface is smooth, but mesogloea is thick and stony due to spherasters.
- Canal system is of leuconoid type.
- Spheraster in thick cortex.
- Spherasters found in the cortex between the cones are well developed while other spicules are absent.
The animal contains pores, oscula and spherasters in thick cortex and all above features hence it is Chondrilla.