''Hazelia'' is a genus of spicular Cambrian
demosponge
Demosponges (Demospongiae) are the most diverse class in the phylum Porifera. They include 76.2% of all species of sponges with nearly 8,800 species worldwide (World Porifera Database). They are sponges with a soft body that covers a har ...
known from the
Burgess Shale, the
Marjum formation
The Marjum Formation is a Cambrian geological formation that overlies the Wheeler Shale in the House Range, Utah. It is known for its occasional preservation of soft-bodied tissue, and is slightly younger than the Burgess Shale
The Burgess S ...
of Utah,
and possibly
Chengjiang.
It was described by
Charles Walcott in 1920.
Its tracts are mainly radial and anastomose to form an irregular skeleton.
[ Its oxeas form a fine net in the skin of the sponge.][
]
References
External links
*
Protomonaxonida
Burgess Shale sponges
Maotianshan shales fossils
Cambrian first appearances
Middle Ordovician extinctions
Prehistoric sponge genera
Taxa named by Charles Doolittle Walcott
Fossil taxa described in 1920
{{demosponge-stub
Cambrian genus extinctions