''Clathrina clara'' is a

species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...

calcareous sponge The calcareous sponges of class Calcarea are members of the animal phylum Porifera, the cellular sponges. They are characterized by spicules made of calcium carbonate in the form of calcite or aragonite. While the spicules in most species hav ...

from India. The name refers to the clear, bright surface of the sponge.

Description

Small, flat but not tubular and has meshes consisting of a network of thin walled tubes which are a compact mass attached directly to the substrate. The surface

cormus Cormus ( : cormi) (from ancient Greek: κορμός, ''kormόs,'' 'stem') is the appearance of a plant that belong to Cormophyte (Pteridophyte and Spermatophyte). In cormus, the vegetative apparatus is no longer a Thallus, such as Algae, that can't ...

comprises tightly-knit tubes, several tubes joining to share one common oscule, slightly raised above the surface. There are no erect free branches. Cells with granules have not been observed. The skeleton comprises two size-classes of equiangular and equiradiate triactines. Actines are conical and straight, with a sharp tip. The large triactines are situated only in the external tubes, delimiting the

, while the smaller triactines are found within the

References

World Register of Marine Species entry
Clathrina Fauna of India Animals described in 2003 {{calcarea-stub