Article
Evidence from 18S ribosomal RNA sequences that lampreys and hagfishes form a natural group.
Science (New York, N.Y.) - 7 Aug 1992
Stock D W, Whitt G S
Abstract excerpt
Lampreys and hagfishes (cyclostomes) traditionally were considered to be a natural (monophyletic) group. Recently, the consensus of opinion, based largely on morphological analyses, has shifted to a view that lampreys are more closely related to jawed vertebrates (gnathostomes) than to hagfishes. Phylogenetic comparisons of 18S ribosomal RNA sequences from two hagfishes, two lampreys, a tunicate, a lancelet, and...
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