Agnatha


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Related to Agnatha: Osteichthyes

Agnatha

aquatic, jawless, fish-like vertebrates characterized by fewer than two pairs of limbs (fins). The group is often given the status of a subphylum to separate it from other vertebrates with jaws which are included in the subphylum Gnathostomata. The Agnatha includes lampreys, hagfish, and the fossil OSTRACODERMI.
References in periodicals archive ?
Psammosteidy (Agnatha, Psammosteidae) devona SSSR [Devonian Psammosteids (Agnatha, Psammosteidae) of the USSR].
HAGATNA Guam AGNATHA (Agnatha Web2) and ATAGHAN (OED)
Class 1 Agnatha (Cyclostomata, Lampreys and Hagfish)
Hagfish, Eptatretus spp., of the class Agnatha, family Myxinidae, are among the most primitive and unique of fishes.
Yvonaspis, nouveau genre d'Osteostraci (Vertebrata, Agnatha) du Devonien (Emsien--Eifelien) des Gres de Gaspe (Quebec, Canada).
9:15 A MORPHOLOGICAL DESCRIPTION OF THE SKIN OF HAG- FISH MYX1NE GLUTINOSA (AGNATHA: MYXINI), Rasheecla S.
From a taxonomic perspective, the Rhytididae as a whole were monographed by Mollendorff (1903) in his treatment of the Agnatha. For the southern African species, this brought a degree of order to the piecemeal description of taxa which had occurred up to that point, helping to clarify the generic affinities of the described species.