Related Experiment Video
Updated: Jun 10, 2026
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
Chaetopsinectria (Nectriaceae, Hypocreales), a new genus with Chaetopsina anamorphs
1Key Laboratory of Systematic Mycology and Lichenology Laboratory, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, P.R. China.
Mycologia
|July 23, 2010
Summary
A new fungal genus, Chaetopsinectria, is proposed for four species previously in Cosmospora, based on distinct morphological and molecular characteristics. This genus is well-supported by DNA sequence analyses, differentiating it from related fungi.
Area of Science:
- Mycology
- Fungal Taxonomy
- Molecular Systematics
Background:
- The genus Cosmospora accommodates fungi with specific morphological traits.
- Previous classifications sometimes grouped morphologically similar fungi that are genetically distinct.
- Accurate fungal classification is crucial for understanding biodiversity and ecological roles.
Purpose of the Study:
- To establish a new genus, Chaetopsinectria, for four species previously assigned to Cosmospora.
- To differentiate these species from Cosmospora based on morphological and molecular data.
- To propose new combinations for these species within the established genus.
Main Methods:
- Morphological characterization of fungal species, including anamorphs, perithecia, asci, and ascospores.
- Culturing fungi on Potato Dextrose Agar (PDA) to observe colony characteristics.
- Molecular phylogenetic analyses using nuclear ribosomal DNA sequences (ITS and 28S partial).
- Employing maximum parsimony and Bayesian inference methods for phylogenetic reconstruction.
Main Results:
- Four species previously in Cosmospora exhibit distinct characteristics, including Chaetopsina anamorphs, small red perithecia, and sienna-colored colonies.
- Sequence analyses of nuclear ribosomal DNA strongly support the segregation of these four species into a new genus, Chaetopsinectria.
- Phylogenetic analyses reveal that Chaetopsinectria is distantly related to Cosmospora coccinea, the type species of Cosmospora.
- Four new combinations are proposed: Chaetopsinectria chaetopsinae, C. chaetopsinae-catenulatae, C. chaetopsinae-penicillatae, and C. chaetopsinae-polyblastiae.
Conclusions:
- The establishment of the genus Chaetopsinectria is well-supported by integrated morphological and molecular evidence.
- This taxonomic revision clarifies the phylogenetic position of these fungi within the Ascomycota.
- The proposed new genus and combinations provide a more accurate classification for these fungal species found on decaying substrates.
Related Concept Videos
01:30Bacterial Phylum Spirochaetes
Spirochetes, unique bacteria in the phylum Spirochaetes, are gram-negative, motile, tightly coiled, slender, and flexible. They inhabit aquatic sediments and animals, with some causing diseases like syphilis. Spirochetes are classified into eight genera based on habitat, pathogenicity, phylogeny, and characteristics.Their distinctive motility arises from endoflagella, located within the cell’s periplasm. These endoflagella anchor at the cell poles and extend along the cell length, encased by a...
01:28Anoxygenic Phototrophic Bacteria
Anoxygenic phototrophic bacteria are a diverse group of microorganisms that perform photosynthesis without producing oxygen. They primarily include purple sulfur bacteria, purple nonsulfur bacteria, green sulfur bacteria, and green nonsulfur bacteria. These bacteria are classified into the Gammaproteobacteria, Alphaproteobacteria, Betaproteobacteria, Chlorobi, and Chloroflexi lineages, each with distinct physiological and ecological adaptations.Purple sulfur bacteria belong to the...
01:29Bacterial Phylum Chlamydiae
The phylum Chlamydiae or Chlamydiota is composed of a single order, Chlamydiales. This phylum consists entirely of obligate intracellular parasites that infect eukaryotic hosts. While human pathogens within this group have been studied extensively, the phylum encompasses many species capable of interacting with various eukaryotic organisms. Members of Chlamydiae are typically small cocci, approximately 0.5 μm in diameter, and exhibit a distinctive developmental cycle. As is characteristic of...
01:27Diversity of Archaea III
Crenarchaeota, a prominent phylum of Archaea, is remarkable for its ability to thrive in extreme environments characterized by high temperatures and acidity. These microorganisms inhabit sulfuric hot springs, volcanic systems, and submarine hydrothermal vents, where temperatures often exceed 100°C. The unique adaptations of Crenarchaeota not only allow survival under such extreme conditions but also provide insights into the mechanisms of life in primordial Earth-like environments.Morphological...
01:24Diversity 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...
01:28Fungal Phylum Microsporidia
Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...