Axodine

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For Dictyochophyceae Silva, 1980, sensu stricto, see Dictyochales.
Axodines
Scientific classification
Domain: Eukaryota
(unranked): Sar
Phylum: Heterokontophyta
Class: Actinochrysophyceae
Mikrjukov & Patterson, 2001
Genera

Dictyochales/Silicoflagellates
   Dictyocha
Rhizochromulinales    Rhizochromulina
Actinodines
   Pedinellales
      Pedinella
      Apedinella
      Pseudopedinella
      Mesopedinella
      Parapedinella
      Actinomonas
      Pteridomonas
   Ciliophryida
      Ciliophrys
   Actinophryida
      Actinophrys
      Actinosphaerium
Florenciellales
   Pseudochattonella

Synonyms
  • Actinochrysea Cavalier-Smith et al. 1995[1]
  • Axodines Patterson, 1994
  • Dictyochophyceae Silva, 1980, emend. Moestrup, 1995, sensu lato

The axodines (Actinochrysophyceae, Actinochrysea or Dictyochophyceae sensu lato)[2] are a group of unicellular heterokont algae, previously classified in the Chrysophyceae.[3]

They include pedinellids, silicoflagellates, and Rhizochromulinales.[2]

Characteristics[edit]

They characteristically have a single emergent flagellum, which lacks the root structure found in related groups, and is extended into a wing-like form supported by an internal rod. They also have tentacles or axopods supported by triads of microtubules, arising from the surface of the nucleus.

Classification and history[edit]

Order Dictyochales[edit]

Main article: Dictyochales

The most notable group is the silicoflagellates, marine plankton that form siliceous skeletons and are well known as fossils.

Order Pedinellales[edit]

Main article: Pedinellales

Most other axodines form a group variously called the pedinellids.

Order Rhizochromulinales[edit]

In addition to the silicoflagellates and actinodines, the marine amoeboid Rhizochromulina marina is included here based on the structure of its zoospores. It is considered closer to the latter group than the former.

References[edit]

  1. ^ Cavalier-Smith T., Chao E. E., Allsopp M. T. E. P. (1995) Ribosomal RNA evidence for chloroplast loss within Heterokonta: pedinellid relationships and a revised classification of ochristan algae. Arch. Protistenkd. 145: 209-220.
  2. ^ a b Mikrjukov K.A., Patterson D.J. (2001) Taxonomy and Phylogeny of Heliozoa. III. Actinophryids. Acta Protozoologica 40: 3-25
  3. ^ Sandgren, C.D.; Smol, J.P.; Kristiansen, J. (1995). Chrysophyte Algae: Ecology, Phylogeny and Development. Cambridge University Press. p. 49. ISBN 9780521462600. Retrieved 2014-12-12.