Cyclostome
Cyclostome is a biological term (from the Greek for "round mouth") used in a few different senses:
- for the taxon Cyclostomata, which comprises the extant jawless fishes: the hagfish (Myxini) and the lampreys (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,[1] and thus the term remains in use.
- for the Order Cyclostomatida of bryozoans, tiny animals that live in colonies and form large calcitic skeletons
- for one of two subgroups of braconid wasps
References
- ^ Stock, David; Whitt GS (7 August 1992). "Evidence from 18S ribosomal RNA sequences that lampreys and hagfishes form a natural group". Science. 257 (5071): 787–9. doi:10.1126/science.1496398. PMID 1496398.
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