''Clathrina jorunnae'' is a
species
In biology, a species is the basic unit of 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 the appropriate s ...
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 Norway.
[ It is only known from Trondheimsfjord, its type locality, where it was dredged from depths of . The specimen was attached to a bryozoan of the genus '']Reteporella
''Reteporella'' is a genus of bryozoans in the family
Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The p ...
''. The species is named after Jorunn Berg, Hans Tore Rapp's grandmother, who introduced Rapp to marine animals.
Description
Cormus is composed of very thin and highly irregularly and loosely anastomosing tubes. No oscula are visible on the surface. Water-collecting tubes are absent. Colour is light beige when alive and white in alcohol. The surface of the tubes minutely hispid due to single actines of the triactines irregularly protruding through the outer surface. The texture is fragile but compressible. Cormus measures 8 mm in diameter. Skeleton is composed of one group of equiangular and equiradiate triactines. The actines are straight, conical, and sharply pointed.
References
Clathrina
Fauna of the Atlantic Ocean
Endemic fauna of Norway
Animals described in 2006
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