Lyssacinosa
Encyclopedia
Lyssacinosa is an order of glass sponges belonging to the subclass Hexasterophora
. These sponges can be recognized by the parenchymal spicule
s usually being unconnected, unlike in other sponges in the subclass where the spicules form a more or less tightly connected skeleton.
Hexasterophora
Hexasterophora are sponges, a subclass in the class Hexactinellida. The Hexasterophora first appeared in the Ordovician and is separated into five recent orders, including the Lyssacinosa, the Hexactinosa, and the Lychniscosa, all of which have living representatives in the seas...
. These sponges can be recognized by the parenchymal spicule
Spicule
Spicules are tiny spike-like structures of diverse origin and function found in many organisms, such as the copulatory spicules of certain nematodes or the grains on the skin of some frogs.In sponges, spicules perform a structural function....
s usually being unconnected, unlike in other sponges in the subclass where the spicules form a more or less tightly connected skeleton.