The jawless fish: an ancient vertebrate lineage that diverged before the evolution of hinged jaws, retaining a round, sucker-like or rasping mouth instead. Cyclostomata includes the lampreys and hagfish, among the very few surviving vertebrate lineages that never evolved jaws at all.
Facts
Disputed
Member Species/Taxa CountApproximate described-species (or, for a genus, described-taxon) count; continually revised as species are newly described, reclassified or synonymized. Taxonomic Rank Scientific Name Classification
Living or Extinct Connections
Sources
1. Cyclostomata (Wikipedia)
comprises the living jawless fish classes: the lampreys and hagfishesView the Source 2. Catalogue of Life
Wikidata: Cyclostomata
Wikidata Q500266, class allow-list match (w-wdresolver-0926)View the Source Cyclostomi (Wikipedia)
In Group: Vertebrate Classes, LeadQuote, In Group: Vertebrate Classes, Lead
Cyclostomi, often referred to as Cyclostomata (, from Ancient Greek κύκλος (kúklos), meaning "circle", and στόμα (stóma), meaning "mouth", and thus, "circular mouth") is a superclass of vertebrates that comprises the living jawless fish classes: the lampreys and hagfishes.
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