Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
Int J Syst Evol Microbiol. 2003 Nov;53(Pt 6):1759-77.

Cytoskeletal organization, phylogenetic affinities and systematics in the contentious taxon Excavata (Eukaryota).

Author information

  • Canadian Institute for Advanced Research, Program in Evolutionary Biology, Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada B3H 4J1.

Abstract

An overview of the controversial proposal for the major eukaryote taxon "Excavata" is presented. Excavata is predicted to include at least ten distinct groups: jakobids, Malawimonas, Trimastix, Carpediemonas, retortamonads, diplomonads, Heterolobosea, oxymonads, parabasalids and Euglenozoa. These "excavates" have broadly similar flagellar apparatus organizations, for which a "universal" terminology is provided. Most, but not all, of these organisms share a distinctive suspension-feeding groove, as well as some or all of a set of seven other proposed cytoskeletal apomorphies. Cladistic analyses of morphological data do not resolve high-level relationships within Excavata. Excavate-rich molecular phylogenies recover some robust clades, but do not support or strongly refute the monophyly of Excavata. A partial classification for excavates is presented, with phylogenetic diagnoses for Excavata and for two novel taxon names, Fornicata (Carpediemonas, retortamonads, diplomonads) and Preaxostyla (Trimastix, oxymonads).

PMID:
14657103
[PubMed - indexed for MEDLINE]
Free full text
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire
    Loading ...
    Write to the Help Desk