Publication Date:
1992-08-07
Description:
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 a number of gnathostomes support the monophyly of the cyclostomes. These data force a reassessment of several features of early vertebrate evolution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stock, D W -- Whitt, G S -- New York, N.Y. -- Science. 1992 Aug 7;257(5071):787-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ecology, Ethology, and Evolution, University of Illinois, Urbana 61801.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1496398" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Base Sequence
;
DNA, Ribosomal/*genetics
;
Genetic Variation
;
Hagfishes/classification/*genetics
;
Lampreys/classification/*genetics
;
Molecular Sequence Data
;
Oligodeoxyribonucleotides
;
*Phylogeny
;
Polymerase Chain Reaction/methods
;
RNA, Ribosomal, 18S/*genetics
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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