Publication Date:
1999-03-19
Description:
Because of their simple organization the Acoela have been considered to be either primitive bilaterians or descendants of coelomates through secondary loss of derived features. Sequence data of 18S ribosomal DNA genes from non-fast evolving species of acoels and other metazoans reveal that this group does not belong to the Platyhelminthes but represents the extant members of the earliest divergent Bilateria, an interpretation that is supported by recent studies on the embryonic cleavage pattern and nervous system of acoels. This study has implications for understanding the evolution of major body plans, and for perceptions of the Cambrian evolutionary explosion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ruiz-Trillo, I -- Riutort, M -- Littlewood, D T -- Herniou, E A -- Baguna, J -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 1999 Mar 19;283(5409):1919-23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Departament de Genetica, Facultat de Biologia, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10082465" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
*Biological Evolution
;
DNA, Helminth/chemistry/genetics
;
DNA, Ribosomal/chemistry/genetics
;
Evolution, Molecular
;
*Genes, rRNA
;
Invertebrates/anatomy & histology/*classification/embryology/genetics
;
Molecular Sequence Data
;
*Phylogeny
;
Platyhelminths/anatomy & histology/*classification/embryology/genetics
;
RNA, Ribosomal, 18S/genetics
;
Sequence Analysis, DNA
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
Permalink
