Related Experiment Video
Updated: Jun 6, 2026

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles
Published on: July 11, 2025
The polyphyletic nature of Paecilomyces sensu lato based on 18S-generated rDNA phylogeny
J Jennifer Luangsa-Ard1, Nigel L Hywel-Jones, Robert A Samson
1BIOTEC, NSTDA Science Park, 113 Paholyothin Road, Khlong 1, Khlong Luang, Pathum Thani, Thailand.
Abstract:
Nuclear-encoded small-subunit ribosomal DNA was used to examine phylogenetic relationships in Paecilomyces sensu lato. Phylogenetic analysis of the 18S nr DNA demonstrates that Paecilomyces is polyphyletic across two subclasses, Sordariomycetidae and Eurotiomycetidae. The type species, Paecilomyces variotii, and thermophilic relatives belong in the order Eurotiales (Trichocomaceae), while mesophilic species related to Paecilomyces farinosus are in the order Hypocreales (Clavicipitaceae and Hypocreaceae). One species, Paecilomyces inflatus, had affinities for the order Sordariales. Within the Eurotiales, Paecilomyces is monophyletic. Within the Hypocreales, species of Paecilomyces are polyphyletic, although the data failed to fully resolve these relationships.
Related Concept Videos
Phylogenetic Species Concept in Microbiology
Microbial Phylogeny
The Tree of Life - Bacteria, Archaea, Eukaryotes
Evolutionary Relationships through Genome Comparisons
Gene Evolution - Fast or Slow?
In contrast, regions which code...
Modern Molecular Taxonomy

