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THE CLASSIFICATION OF SOME COLONIAL CHLAMYDOMONADS.

THE CLASSIFICATION OF SOME COLONIAL CHLAMYDOMONADS. 15 i HE Isokontae show at least three distinct types of plam: structure, the filamentous, the coenocytic and the unicellular. The unicellular forms may be regarded as belonging to one order [21] although a few are best excluded in view of their probable origin by reduction from filamentous forms. This unicellular group is spoken of as the Protococcoidete [1, 19] or Protococcales [21], names which should be abandoned however because the generic name Protococcus has been used to denote a heterogeneous collection of Algse, and is now used [21, p. 191] to designate forms i^=Pleurococcits) which are probably reduced members of the Ulotrichales. The name Volvocales is also unsuitable, since Volvox is not a typical representative of the group, and the term is in general use to indicate the motile members [14, 15, etc.]. On the whole the general characters are better expressed by the designation Chlamydomonadaies, for the whole morphology of the group can be described in reference to that of Chlainydoinonas. We are here only concerned with the normally motile members, which were formerly subdivided into (a) solitary (b) colonial forms [1, 2, 3, 6, 19], groups which are now known to represent different types of http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png New Phytologist Wiley

THE CLASSIFICATION OF SOME COLONIAL CHLAMYDOMONADS.

Crow, W. Bernard
New Phytologist , Volume 17 (7) – Jul 1, 1918
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References (16)

Publisher
Wiley
Copyright
Copyright © 1918 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0028-646X
eISSN
1469-8137
DOI
10.1111/j.1469-8137.1918.tb07276.x
Publisher site
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Abstract

15 i HE Isokontae show at least three distinct types of plam: structure, the filamentous, the coenocytic and the unicellular. The unicellular forms may be regarded as belonging to one order [21] although a few are best excluded in view of their probable origin by reduction from filamentous forms. This unicellular group is spoken of as the Protococcoidete [1, 19] or Protococcales [21], names which should be abandoned however because the generic name Protococcus has been used to denote a heterogeneous collection of Algse, and is now used [21, p. 191] to designate forms i^=Pleurococcits) which are probably reduced members of the Ulotrichales. The name Volvocales is also unsuitable, since Volvox is not a typical representative of the group, and the term is in general use to indicate the motile members [14, 15, etc.]. On the whole the general characters are better expressed by the designation Chlamydomonadaies, for the whole morphology of the group can be described in reference to that of Chlainydoinonas. We are here only concerned with the normally motile members, which were formerly subdivided into (a) solitary (b) colonial forms [1, 2, 3, 6, 19], groups which are now known to represent different types of

Journal

New Phytologist – Wiley

Published: Jul 1, 1918

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