Phylogeny and ultrastructure of Miliammina fusca: evidence for secondary loss of calcification in a Miliolid Foraminifer.
J Eukaryot Microbiol
; 53(3): 204-10, 2006.
Article
em En
| MEDLINE
| ID: mdl-16677344
ABSTRACT
The classification of the Foraminifera, a widely distributed group of largely marine protists, has traditionally been based on morphological characters. The most important of these are the composition and structure of the shell or "test." Here, we use both phylogenetic analysis of the genes for small subunit rRNA and beta-tubulin and ultrastructural analysis to document a reversion in wall type from more derived calcareous tests to an agglutinated test. These data indicate that the genus Miliammina, and possibly other members of the Rzehakinidae, should be placed in the Order Miliolida as opposed to their current assignment in Order Textulariida. We also address the effects this reversion may have had on the ability of rzehakinacids to effectively colonize marginal marine environments. Finally, the hypothesis that some multilocular agglutinated foraminiferans descended from calcareous lineages has implications for interpretation of the foraminiferal fossil record.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Filogenia
/
Eucariotos
Limite:
Animals
Idioma:
En
Revista:
J Eukaryot Microbiol
Assunto da revista:
MICROBIOLOGIA
/
PARASITOLOGIA
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Estados Unidos