agnathan


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Related to agnathan: Osteichthyes

agnathan

(ăg′nə-thən)
n.
Any of various fishes lacking jaws, including the hagfishes and the lampreys and many extinct groups, such as the ostracoderms.

ag′na·than adj.
References in periodicals archive ?
As noted above, there are two copies of Aqp3 in the agnathan lamprey genome (sea lamprey Petromyzon marinus Linnaeus, 1758; Finn et al.
Antigen-receptor genes of the agnathan lamprey are assembled by a process involving copy choice.
In middle Saaremaa, microlaminated argillaceous Eurypterus-dolostones or domerites contain often lingulid, eurypterid, and agnathan remains (Uduvere-968 core, depth 3.
Some marl levels downstream along the Lemovzha River contain well-preserved remains of agnathans and fishes (Ivanov & Lebedev 2011; Skutschas et al.
The taxonomy and distribution of agnathans and fishes in southern Britain have been investigated, the regional vertebrate zonal scheme has been updated and characteristic vertebrate assemblages have been correlated with the conodont zonation (Miller & Marss 1999; Turner 2000; Marss & Miller 2004).
The fossil fishes that have so far been used for distinguishing zones are agnathans, placoderms and acanthodians (e.
Kompleksy srednedevonskikh psammosteidnykh beschelyustnykh vostochnoj chasti Glavnogo devonskogo polya [The assemblages of Middle Devonian psammosteid agnathans from the eastern part of Main Devonian Field].