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Camarosporidiella, a challenge

W M Jaklitsch1, M N Blanco2, F J Rejos2

  • 1Division of Systematic and Evolutionary Botany, Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, 1030 Wien, Austria.

Studies in Mycology
|May 15, 2025
PubMed

Insights

This study revises the fungal genus Camarosporidiella, describing 15 new species and clarifying 34 accepted taxa using molecular phylogenetics. Host identification is crucial for species determination when molecular data is unavailable.

Area of Science:

  • Mycology
  • Plant Pathology
  • Molecular Systematics

Background:

  • The fungal genus Camarosporidiella, primarily associated with Fabaceae hosts, requires phylogenetic and species composition assessment.
  • Previous taxonomic studies lacked comprehensive molecular data for accurate species delineation.

Purpose of the Study:

  • To conduct a molecular phylogenetic analysis of Camarosporidiella to resolve its species composition.
  • To stabilize taxonomic concepts by re-evaluating type specimens and establishing lectotypes and epitypes for several species.

Main Methods:

  • DNA extraction from over 160 pure cultures of ascospores and conidia.
  • Multigene phylogenetic analyses using nuSSU, ITS, LSU rDNA, rpb2, tef1, and tub2 sequences.
  • Type studies including lectotypification and epitypification of established species.

Main Results:

  • Phylogenetic analyses resolved 27 statistically supported phylogenetic species, including 15 newly described species.
  • A total of 34 species are now accepted within the genus Camarosporidiella.
  • Morphological characteristics alone are insufficient for species identification; host association is a key diagnostic feature.

Conclusions:

  • The study provides a robust phylogenetic framework for the genus Camarosporidiella.
  • Fifteen new species and several new combinations are proposed, significantly expanding the known diversity.
  • Accurate host identification is recommended for routine species determination in the absence of molecular data.
Keywords:
CamarosporiumCucurbitariaPleosporalesnew taxataxonomy

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