Gwynia capsula
Gwynia capsula is a very small to minute brachiopod, currently known from the east Atlantic, but which occurred during the Pleistocene in what is now Norway. It has a translucent, whitish, purse-shaped shell with relatively large, wide-spaced pits. It lives attached to stones or shells in between large grains of sand. Like in all brachiopods, it filters food particles, chiefly diatoms and dinoflagellates. Gwynia capsula harbors a small number of larvae inside a brood pouch, but it has separate sexes, unlike also very small and pouch brooding brachiopods Argyrotheca and Joania, which are hermaphrodites.