Linked Life Data

9326623

Source:http://linkedlifedata.com/resource/pubmed/id/9326623

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
21
pubmed:dateCreated
1997-11-24
pubmed:databankReference
pubmed:abstractText
Polycystine radiolaria are among few protistan groups that possess a comprehensive fossil record available for study by micropaleontologists. The Polycystinea and the Acantharea, whose skeletons do not become fossilized, were once members of the class "Radiolaria" ("Radiolaria" sensu lato: Polycystinea, Phaeodarea, and Acantharea) originally proposed by Haeckel but are now included in the superclass Actinopoda. Phylogenetic relationships within this superclass remain largely enigmatic. We investigated the evolutionary relationship of the Acantharea and the Polycystinea to other protists using phylogenetic analyses of 16S-like ribosomal RNA (rRNA) coding regions. We circumvented the need to culture these organisms by collecting and maintaining reproductive stages that contain many copies of their genomic DNA. This strategy facilitated extraction of genomic DNA and its purification from symbiont and prey DNA. Phylogenetic trees inferred from comparisons of 16S-like coding regions do not support a shared history between the Acantharea and the Polycystinea. However, the monophyly of the Acantharea and the separate monophyly of the Polycystinea (Spumellarida) are well supported by our molecular-based trees. The acantharian lineage branches among crown organisms whereas the polycystine lineage diverges before the radiation of the crown groups. We conclude that the Actinopoda does not represent a monophyletic evolutionary assemblage and recommend that this taxonomic designation be discarded.
pubmed:grant
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/9326623-1451682, http://linkedlifedata.com/resource/pubmed/commentcorrection/9326623-1585174, http://linkedlifedata.com/resource/pubmed/commentcorrection/9326623-2200342, http://linkedlifedata.com/resource/pubmed/commentcorrection/9326623-2448289, http://linkedlifedata.com/resource/pubmed/commentcorrection/9326623-2509717, http://linkedlifedata.com/resource/pubmed/commentcorrection/9326623-3224833, http://linkedlifedata.com/resource/pubmed/commentcorrection/9326623-3241556, http://linkedlifedata.com/resource/pubmed/commentcorrection/9326623-3939705, http://linkedlifedata.com/resource/pubmed/commentcorrection/9326623-6989987, http://linkedlifedata.com/resource/pubmed/commentcorrection/9326623-8193955, http://linkedlifedata.com/resource/pubmed/commentcorrection/9326623-8302218, http://linkedlifedata.com/resource/pubmed/commentcorrection/9326623-8517756
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0027-8424
pubmed:author
pubmed:issnType
Print
pubmed:day
14
pubmed:volume
94
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
11411-6
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
Phylogenetic relationships between the Acantharea and the Polycystinea: a molecular perspective on Haeckel's Radiolaria.
pubmed:affiliation
The Josephine Bay Paul Center in Comparative Molecular Biology and Evolution, Marine Biological Laboratory, 7 MBL Street, Woods Hole, MA 02543, USA. amaral@evol5.mbl.edu
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't