Clathrina jorunnae is a species of calcareous sponge from Norway.

[2] It is only known from Trondheimsfjord, its type locality, where it was dredged from depths of 25–250 m (82–820 ft).

[1] Cormus is composed of very thin and highly irregularly and loosely anastomosing tubes.

Colour is light beige when alive and white in alcohol.

Skeleton is composed of one group of equiangular and equiradiate triactines.