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Taxon:
Subclass
Cephalaspidomorpha
(fish)
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Entity:
[Agnatha] (Class)
..[†Anaspida] (Order) - anaspids
..[Cephalaspidomorphi] (Subclass)
..[†Conodonta] (Subclass)
..[Cyclostomata] (Subclass)
..[†Myllokunmingiida] (Subclass)
..[Myxinoidea] (Subclass) - hagfishes
..[Myxinoidea] (Order) - hagfishes
..[ostracoderms]
..[Petromyzoniformes] (Order)
..[Petromyzontia] (Order)
..[Petromyzontida] (Subclass) - lampreys
..[†Pteraspidomorphi] (Subclass)
..[†Thelodonti] (Subclass)
..[†Thelodonti] (Order)
..[†unnamed] (Subclass)
..[Cephalaspidomorpha] (Subclass)
Concise hierarchy
(Kingdom)
Animalia
-
(Phylum)
Chordata
-
(Class)
Agnatha
Current position
Agnatha
(Class)
Cope, 1889
Ref:
R.L. Carroll, 1988
: App. (p. 596).
Historical positions
Agnatha
(Class)
Cope, 1889
Ref:
R.L. Carroll, 1988
: App. (p. 596).
Number of Subtaxa
1988
R.L. Carroll
: 596
[1o;1f; †3o;22f]
©2004-2026 Universal Taxonomic Services
Last updated:
28 Aug 2026