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Informal group:
"
ostracoderms
"
(fish)
Taxa
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Entity:
[Agnatha] (Class)
..[†Anaspida] (Order) - anaspids
..[Cephalaspidomorpha] (Subclass)
..[Cephalaspidomorphi] (Subclass)
..[†Conodonta] (Subclass)
..[†Myllokunmingiida] (Subclass)
..[Myxinoidea] (Subclass) - hagfishes
..[Myxinoidea] (Order) - hagfishes
..[Petromyzoniformes] (Order)
..[Petromyzontia] (Order)
..Petromyzontida (Subclass) - lampreys
..[†Pteraspidomorphi] (Subclass)
..[†Thelodonti] (Subclass)
..[†Thelodonti] (Order)
..[†unnamed] (Subclass)
..[ostracoderms]
....[†Coelolepida] (Order)
Concise hierarchy
(Kingdom)
Animalia
-
(Phylum)
Chordata
-
(Class)
Agnatha
Current position
Agnatha
(Class)
Cope, 1889
Ref:
A.S. Romer & T.S. Parsons, 1986
: App. 1 (p. 620).
Historical positions
Agnatha
(Class)
Cope, 1889
Ref:
A.S. Romer & T.S. Parsons, 1986
: App. 1 (p. 620).
Number of Subtaxa
1986
A.S. Romer & T.S. Parsons
: App. 1 (p. 620)
[; †4o]
©2004-2024 Universal Taxonomic Services
Last updated:
1 Feb 2024