Tentaculita

Tentaculita is an extinct class of uncertain placement ranging from the Early Ordovician to the Middle Jurassic. They were suspension feeders with a near worldwide distribution. For a more thorough discussion, see Tentaculites.

Tentaculita Temporal range: Ordovician–Middle Jurassic PreꞒ Ꞓ O S D C P T J K Pg N Early Ordovician to Middle Jurassic (Vinn 2010)
Tentaculitids from the Devonian of Maryland.
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Superphylum:	Lophotrochozoa (?)
Class:	†Tentaculita Boucek, 1964
Taxa of uncertain placement
Anticalyptraea[1] Chonioconarida[2] Cornulitida[3] Dacryoconarida[2] Microconchida[4] Tentaculitida

The presence of perforate septa and "septal necks" has been used to argue for a cephalopod affinity, whereas the shell microstructure, notably the presence of punctae, points to a brachiopod relationship.^[5]