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Hanusia phi gen. et sp. nov. (Cryptophyceae): characterization of ‘Cryptomonas sp. Φ’

Published online by Cambridge University Press:  01 May 1998

JAMES A. DEANE ,
DAVID R. A. HILL ,
STEVEN J. BRETT  and
GEOFFREY I. McFADDEN
JAMES A. DEANE
Affiliation:
Plant Cell Biology Research Centre, School of Botany, University of Melbourne, Parkville, 3052, Australia
DAVID R. A. HILL
Affiliation:
School of Botany, The University of Melbourne, Parkville 3052, Australia
STEVEN J. BRETT
Affiliation:
The Department of Ecology and Evolutionary Biology, Monash University, Clayton, 3168, Australia
GEOFFREY I. McFADDEN
Affiliation:
Plant Cell Biology Research Centre, School of Botany, University of Melbourne, Parkville, 3052, Australia
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Abstract

Cryptomonas sp. Φ is an undescribed cryptomonad used for many studies into the endosymbiotic origin of plastids. Cryptomonas sp. Φ was characterized using electron microscopy, DNA sequencing and karyotyping. DNA sequence data show that Cryptomonas sp. Φ has been confused with the related cryptomonad, Guillardia theta, which is the organism actually used in most published studies on cryptomonad endosymbiosis to date. It is proposed that the strain Cryptomonas sp. Φ be recognized as a distinct species under the name Hanusia phi. Although Hanusia phi shares molecular and karyotypic features with G. theta, it cannot be assigned to Guillardia because it does not fit the morphological description of this genus. H. phi differs from G. theta in periplast structure, configuration of the furrow-gullet system, and cell size. Morphologically, however, H. phi is very similar to Teleaulax acuta, Teleaulax merimbula and the diplomorph of Proteomonas sulcata.

Keywords

cryptomonadCryptomonas sp. ΦHanusia phinucleomorph
Type
Research Article
Information
European Journal of Phycology , Volume 33 , Issue 2 , May 1998 , pp. 149 - 154
Copyright
© 1998 British Phycological Society

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