Jeletzkya

Jeletzkya douglassae is a fossil belemnoid from the early Pennsylvanian Mazon Creek lagerstätten and represents the earliest known crown-group squid.^[1] Non-mineralized anatomy is preserved and comprises ten hooked tentacles and a radula. It is too poorly understood for assignment to any particular cephalopod taxon.^[2] J. douglassae is 14 mm long.

Jeletzkya Temporal range: Early Pennsylvanian PreꞒ Ꞓ O S D C P T J K Pg N
Artist's reconstruction of J. douglassae swimming above a Tullimonstrum.
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	Coleoidea
Superorder:	†Belemnoidea
Genus:	†Jeletzkya
Species:	†J. douglassae