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Related Concept Videos

Diversity of Protists I01:15

Diversity of Protists I

Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...
Diversity of Protists IV01:27

Diversity of Protists IV

Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...
Diversity of Protists III01:27

Diversity of Protists III

Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
Diversity of Protists II01:27

Diversity of Protists II

Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
Overview of Protists01:27

Overview of Protists

Protists are diverse eukaryotic microorganisms that lack the specialized tissues of plants and animals and the chitinous cell walls of fungi. Their early divergence within Eukarya resulted in structural, functional, and ecological diversity. They are classified into supergroups such as Archaeplastida, Excavata, Amoebozoa, Rhizaria, Alveolata, and Stramenopiles, determined through genetic analysis and structural similarities.Structural and Functional AdaptationsProtists have various adaptations...
Diversity of Archaea II01:24

Diversity of Archaea II

Archaea, one of the three domains of life, exhibit remarkable diversity and adaptability, thriving in both extreme and moderate environments. Historically, most identified archaea have been classified into two major phyla: Euryarchaeota and Crenarchaeota. However, recent molecular studies have expanded this classification to include three additional phyla: Thaumarchaeota, Nanoarchaeota, and Korarchaeota, each exhibiting unique characteristics and ecological roles.Thaumarchaeota: Mesophiles...

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Updated: Jun 30, 2026

Establishment of Microbial Eukaryotic Enrichment Cultures from a Chemically Stratified Antarctic Lake and Assessment of Carbon Fixation Potential
14:38

Establishment of Microbial Eukaryotic Enrichment Cultures from a Chemically Stratified Antarctic Lake and Assessment of Carbon Fixation Potential

Published on: April 20, 2012

Cryptic diversity in intestinal protists.

C G Clark1

  • 1Infectious and Tropical Disease, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, GB. graham.clark@lshtm.ac.uk

Parasite (Paris, France)
|September 26, 2008
PubMed
Summary
This summary is machine-generated.

Recent genetic data has reshaped understanding of intestinal parasitic protists, leading to revised species classifications. Further research requires careful interpretation to avoid premature conclusions.

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Establishment of Microbial Eukaryotic Enrichment Cultures from a Chemically Stratified Antarctic Lake and Assessment of Carbon Fixation Potential
14:38

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Published on: April 20, 2012

Selective Cleaning of Wild Caenorhabditis Nematodes to Enrich for Intestinal Microbiome Bacteria
09:47

Selective Cleaning of Wild Caenorhabditis Nematodes to Enrich for Intestinal Microbiome Bacteria

Published on: August 13, 2021

Area of Science:

  • * Parasitology
  • * Molecular Biology
  • * Genetics

Background:

  • * Significant advancements in understanding genetic variation within and between species of intestinal parasitic protists have occurred.
  • * This has led to a re-evaluation of existing species classifications.

Purpose of the Study:

  • * To summarize recent findings on the genetic variation of intestinal parasitic protists.
  • * To discuss the implications of these findings for future research.
  • * To highlight the need for caution in interpreting new data.

Main Methods:

  • * Review of recent scientific literature and genetic data.
  • * Analysis of taxonomic changes in intestinal parasitic protists.
  • * Synthesis of findings to guide future research methodologies.

Main Results:

  • * New species names have been assigned to intestinal parasitic protists based on genetic evidence.
  • * Several previously recognized species have been invalidated or reclassified.
  • * The data indicates a dynamic and evolving understanding of protist taxonomy.

Conclusions:

  • * Recent genetic discoveries necessitate a revision of intestinal parasitic protist taxonomy.
  • * Future studies should exercise caution to prevent premature conclusions.
  • * Continued genetic analysis is crucial for accurate classification and understanding of these parasites.