class Hyalospongiae vs glass sponge

class Hyalospongiae and glass sponge both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Hyalospongiae	Yes	No	No	No
glass sponge	Yes	No	No	No

class Hyalospongiae (noun)	glass sponge (noun)
sponges with siliceous spicules that have six rays; choanocytes are restricted to finger-shaped chambers	a siliceous sponge (with glassy spicules) of the class Hyalospongiae