Cyclostome is a
biology term (from the
Greek language for "round mouth") used in a few different senses:
-
for the taxon Cyclostomi, which comprises the extant Agnatha: the hagfish (Myxini) and the (Petromyzontidae). This was thought for a time to be a paraphyletic group and this usage of the term was deprecated by some. However, there is strong molecular evidence for cyclostome monophyly,
-
for the Order Cyclostomatida of , tiny animals that live in colonies and form large calcitic skeletons.
-
for one of two subgroups of Braconidae wasps.
