Chromista is a proposed but polyphyletic [1] [2] [3] biological kingdom, refined from the Chromalveolata, consisting of single-celled and multicellular eukaryotic species that share similar features in their photosynthetic organelles . [4]

Chromista is one of five eukaryotic kingdoms recognised in a comprehensive seven-kingdom classification of life (Ruggiero et al. 2015).

The photoautotrophic species of Chromista inhabit a large range of contrasting adaptive zones and include the vast majority of marine, freshwater as well as soil algae. The size, shape and biology of photoautotrophic Chromista species are also very diverse.

Chromista Quick Reference The name proposed by T. Cavalier-Smith for a kingdom to contain those eukaryotic species that show the following specific ultrastructural similarities.

Dec 19, 2023 · Chromista and Protista represent classifications of the biological world that have caused debate among taxonomists. Chromista primarily comprises photosynthetic organisms, most notably the brown algae, diatoms, and water molds. In contrast, Protista encapsulates a broader group of eukaryotic microorganisms.

Nov 3, 2024 · Chromista. A taxonomic taxon within the subkingdom Biciliata – all algae whose chloroplasts contain chlorophylls a and c. [from 1981] A taxonomic kingdom within the superkingdom Eukaryota. [1]

Chromista is a biological kingdom consisting of single-celled and multicellular eukaryotic species that share similar features in their photosynthetic organelles (plastids). It includes all protists whose plastids contain chlorophyll c, such as some algae, diatoms, oomycetes, and protozoans.

Chromista - The Chromista are a paraphyletic eukaryotic supergroup, which may be treated as a separate kingdom or included among the Protista. They include all algae whose chloroplasts contain chlorophylls a and c, as well as various colorless forms that are closely related to them.

Pythium, genus of destructive root parasites of the family Pythiaceae (phylum Oomycota, kingdom Chromista). Pythium species have filamentous sporangia, smooth-walled spherical oogonia, and stalked antheridia.

The original definition of the kingdom Chromista (Cavalier-Smith, 1981) was “all chromophyte algae where chloroplasts are separated from the cytosol by four topologically distinct membranes as well as all heterotrophic protists that descended secondarily from them by losing plastids.”