Publication Date:
2015-04-24
Description:
Over the past 200 years, almost every invertebrate phylum has been proposed as a starting point for evolving vertebrates. Most of these scenarios are outdated, but several are still seriously considered. The short-range transition from ancestral invertebrate chordates (similar to amphioxus and tunicates) to vertebrates is well accepted. However, longer-range transitions leading up to the invertebrate chordates themselves are more controversial. Opinion is divided between the annelid and the enteropneust scenarios, predicting, respectively, a complex or a simple ancestor for bilaterian animals. Deciding between these ideas will be facilitated by further comparative studies of multicellular animals, including enigmatic taxa such as xenacoelomorphs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holland, Nicholas D -- Holland, Linda Z -- Holland, Peter W H -- England -- Nature. 2015 Apr 23;520(7548):450-5. doi: 10.1038/nature14433.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Marine Biology Research Division, Scripps Institution of Oceanography, University of California at San Diego, La Jolla, California 92093, USA. ; Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25903626" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Annelida/anatomy & histology/classification
;
Invertebrates/anatomy & histology/classification
;
Models, Biological
;
*Phylogeny
;
Research
;
*Vertebrates/anatomy & histology/classification
Print ISSN:
0028-0836
Electronic ISSN:
1476-4687
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
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