Cytoskeletal organization, phylogenetic affinities and systematics in the contentious taxon Excavata (Eukaryota)
Cytoskeletal organization, phylogenetic affinities and systematics in the contentious taxon Excavata (Eukaryota)
复制标题
DOI：
10.1099/ijs.0.02578-0
复制
发表时间：
2003-11-01
影响因子：
2.8
通讯作者：
Simpson, AGB
中科院分区：
文献类型：
--
作者：
Simpson, AGB
本文概述了关于主要真核生物分类单元"掘孔纲"的争议性建议。据预测，出土动物至少包括十个不同的类群：jakobids，Malawimonas，Trimastix，Carpediemonas，Acutamonads，Acutamonads，Heterolobosea，oxymonads，parabasalids和Euglenozoa。这些“挖掘”具有广泛相似的鞭毛器组织，并为其提供了“通用”术语。大多数，但不是全部，这些生物体共享一个独特的悬浮液喂养槽，以及一些或全部的一组其他七个建议的细胞骨架无定形。形态学数据的分支分析并不能解决挖掘动物门内的高层次关系。挖掘丰富的分子系统学恢复了一些强大的分支，但不支持或强烈反驳的单系挖掘。挖掘的部分分类，系统发育诊断挖掘和两个新的分类单元的名称，穹窿（Carpediemonas的，pastamonads，pastamonads）和Preaxostyla（Trimastix，oxymonads）。
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).