"Cyclostomata" redirects here. For the order of bryozoans, see Cyclostomatida.
Cyclostomi
Temporal range: Lochkovian - Recent 419.2–0 Ma
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Sea lamprey from Sweden
Scientific classification
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Chordata
Infraphylum:
Agnatha
Superclass:
Cyclostomi Duméril, 1806
Classes
Myxini (hagfishes)
Hyperoartia (lampreys)
Cyclostomi, often referred to as Cyclostomata/sɪkloʊˈstɒmətə/, is a group of vertebrates that comprises the living jawless fishes: the lampreys and hagfishes. Both groups have jawless mouths with horny epidermal structures that function as teeth called ceratodontes, and branchial arches that are internally positioned instead of external as in the related jawed fishes.[1] The name Cyclostomi means "round mouths".[2][3][4] It was named by Joan Crockford-Beattie.[5]
^The oldest fish in the world lived 500 million years ago | SBS News
^
Kuraku, Shigehiro, S. Blair; Ota, Kinya G. & Kuratani, Shigeru (2009b). "Jawless fishes (Cyclostomata)". In S.B. Hedges & S. Kumar (eds.). Timetree of Life. Oxford University Press. pp. 317–319. ISBN 978-0-19-953503-3.
^Haeckel (1895). Systematische Phylogenie der Wirbelthiere (Vertebrata). Entwurf einer systematischen Stammesgeschichte (in German). Vol. 3 (1 ed.). Berlin: Georg Reimer. pp. 142–143.
^
Duméril, A.M. Constant (1806). Zoologie analytique, ou me´thode naturelle de classification des animaux, Rendue plus facile a l'Aide de Tableaux Synoptiques (in French). Paris: Allais.
^Turner, Susan; Beattie, Joan (2008). "Joan Crockford-Beattie D.Sc." (PDF). Annals of Bryozoology 2: Aspects of the History of Research on Bryozoans. 2: viii, 442.
Cyclostomi, often referred to as Cyclostomata /sɪkloʊˈstɒmətə/, is a group of vertebrates that comprises the living jawless fishes: the lampreys and hagfishes...
related to each other than to jawed vertebrates, thus forming the clade Cyclostomi. The oldest-known stem group hagfish are known from the Late Carboniferous...
smelling, which can also be referred to as nostrils (with the exception of Cyclostomi, which have just one nostril). In humans, the nasal cycle is the normal...
more closely related to each other than to jawed fish, forming the clade Cyclostomi. The oldest fossil agnathans appeared in the Cambrian, and two groups...
and fishes. Dumeril (1806) grouped hagfishes and lampreys in the taxon Cyclostomi, characterized by horny teeth borne on a tongue-like apparatus, a large...
Greek for "round mouth") used in a few different senses: for the taxon Cyclostomi, which comprises the extant jawless fishes: the hagfish (Myxini) and the...
classes: Agnatha or jawless fish, which include: †Conodonta †Ostracodermi Cyclostomi (hagfish and lampreys) Gnathostomata or jawed vertebrates, which include:...
jawless fish, than they are to jawed vertebrates, forming the superclass Cyclostomi. The oldest fossils of stem-group lampreys are from the latest Devonian...
(Pennsylvanian) Mazon Creek fossil beds United States ( Illinois) A member of Cyclostomi. The type species is S. testai. Xiyuichthys Nom. et sp. nov Shan et al...
sarcopterygian groups are marked in bold letters. Phylum Craniata Class Cyclostomi Class Chondrichthyes Class Cladistia Class Actinopteri Class unspecified...
Vertebrata, Abt. 1: Pisces (Fische), Buch 1: Einleitendes, Leptocardii und Cyclostomi, bearbeitet von Dr. E. Lönnberg, G. Favaro, B. Mozejko und M. Rauther...
is conserved in all jawed vertebrates but does not have orthologs in Cyclostomi, invertebrates, or non-animal life forms. Chondrichthyes or cartilaginous...
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