Hazeliidae

Hazeliidae is an extinct family of spicular Cambrian sea sponges known from the Burgess Shale, the Marjum Formation of Utah,^[3] and possibly Chengjiang.^[1] It was described by Charles Walcott in 1920.

Hazeliidae Temporal range: Chengjiang–Middle Ordovician[1] PreꞒ Ꞓ O S D C P T J K Pg N
A specimen of Hazelia at the Mount Stephen Trilobite Beds
Scientific classification
Kingdom:	Animalia
Phylum:	Porifera
Class:	Demospongiae
Order:	†Protomonaxonida
Family:	†Hazeliidae Walcott, 1920
Genera
Falospongia Rigby, 1986 Hazelia Walcott, 1920 Crumillospongia Rigby, 1986[2]