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Stramenopiles

Mitchell L Sogin and David J. Patterson *

     ==========================     ?====== Hamatores  (Caecitellus and pseudodendromonads) 
     |
     |     ================================ Proteromonads 
<<===|  ===|
     |  |  ================================ Opalines 
     |  |
     ===|  ================================ Developayella 
        |  |
        |  |        ======================= Diplophrys 
        |  |     ===|
        ===|  ===|  ======================= Labyrinthulids 
           |  |  |
           |  |  ========================== Thraustochytrids 
           |  |
           |  |  ========================== Bicosecids 
           ===|  |
              |  |     ==================== Oomycetes 
              |  |  ===|
              |  |  |  ==================== Hypochytridiomycetes 
              |  |  |
              |  |  |  ==================== Commation 
              ===|  |  |
                 |  |  |=================== Reticulosphaera 
                 |  |  |
                 |  |  |=================== Pelagomonas 
                 |  |  |
                 |  |  |=================== Pelagococcus 
                 |  |  |
                 ===|  |=================== Ollicola 
                    |  |
                    |  |=================== Aureococcus 
                    |  |
                    |  |=================== Parmales 
                    |  |
                    |  |=================== Diatoms 
                    |  |
                    |  |     ============== Xanthophytes 
                    |  |=====|
                    |  |     ============== Phaeophytes (brown algae) 
                    |  |
                    ===|=================== Eustigmatophytes 
                       |
                       |=================== Raphidophytes 
                       |
                       |=================== Synurids 
                       |
                       |                === Rhizochromulinaales 
                       |             ===|
                       |===Axodines==|  === Pedinellales 
                       |             |
                       |             ====== Dictyochales 
                       |
                       |=================== Chrysomeridales 
                       |
                       |=================== Sarcinochrysidales 
                       |
                       |=================== Hydrurales 
                       |
                       |=================== Hibberdiales 
                       |
                       ==================== Chromulinales 

Containing clade(s): Eukaryotes


Table of Contents

Introduction
Characteristics of Stramenopiles
References

Introduction

This grouping of protists arose largely from molecular studies which categorically confirmed that algae (previously referred to as Heterokonts or Chrysophytes) were related to a variety of non algal protists - such as the heterotrophic bicosoecid flagellates and the fungal oomycetes (Leipe et al, 1994). The group was informally named by Patterson (1989) and was based at that time on cytological evidence. The hairs which define this group are a distinctive subset of hairs encountered in protists, and are distinguished by having a long hollow shaft that gives rise to a small number of fine hairs, and the entire structure inserts into the cell by a basal region. These hairs usually occur on the flagella. A number of supposed stramenopiles are thought (opalines) or known (diatoms) to have lost the hairs. The stramenopiles is a very major grouping of eukaryotes containing some organisms with the largest linear dimensions known in the eukaryotic world (brown algae), as well as ecologically very important organisms - such as the diatoms

Characteristics of Stramenopiles

Tubulocristate protists with tripartite tubular hairs or derived from such organisms.

References

Leipe, D.D., Wainright, P.O., Gunderson, J.H., Porter, D., Patterson, 
          D.J.,Valois, F., Himmerich, S. and Sogin, M.L. (1994): 
          The stramenopiles from a molecular perspective: 16S-like 
          rRNA sequences from Labyrinthuloides minuta and Cafeteria 
          roenbergensis. Phycologia. 33:369-377.

Patterson, D.J. (1989): Stramenopiles: chromophytes from a protistan 
          perspective. In: Green J.C., Leadbeater B.S.C. and 
          diver W.L. (eds): The chromophyte algae problems and 
          perspectives, pp. 357-379. Clarendon Press, Oxford.


About this page

Mitchell L Sogin
E-mail: sogin@evol5.mbl.edu.
Marine Biological Laboratory
Woods Hole MA 02543 USA

David J. Patterson
E-mail: djp@bio.usyd.edu.au..
School of Biological Sciences
Sydney University
Sydney, Australia

Page copyright © 1995 Mitchell L. Sogin and David J. Patterson

Last saved 8 September 2000


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