Received 23 September 1994. Accepted 17 February 1995.
GOMPHONEIS MESTA (BACILLARIOPHYTA). II. MORPHOLOGY OF THE INITIAL FRUSTULES AND PERIZONIUM ULTRASTRUCTURE WITH SOME INFERENCES ABOUT DIATOM EVOLUTION1
Version of Record online: 28 JUN 2008
Journal of Phycology
Volume 31, Issue 3, pages 447–456, June 1995
How to Cite
Passy-Tolar, S. I. and Lowe, R. L. (1995), GOMPHONEIS MESTA (BACILLARIOPHYTA). II. MORPHOLOGY OF THE INITIAL FRUSTULES AND PERIZONIUM ULTRASTRUCTURE WITH SOME INFERENCES ABOUT DIATOM EVOLUTION. Journal of Phycology, 31: 447–456. doi: 10.1111/j.0022-3646.1995.00447.x
- Issue online: 28 JUN 2008
- Version of Record online: 28 JUN 2008
- Gomphoneis mesta;
- initial frustules;
- life history;
- ontogeny perizonium;
The morphology of initial frustules of Gomphoneis mesta Passy-Tolar & Lowe was studied with light and scanning electron microscopy The structure of the raphe, central nodule, stigma, striae, and apical pore field in post-auxospore generations was described. Discovery of internal chambers and an axial plate in very early stages of the life cycle of G. mesta reveals a possible evolutionary connection with the Herculeana group (sensu Kociolek and Stoermer 1989) and suggests that the loss of axial plates is a secondary event. Polarization of the characters “stigma number” and “outline of the internal stigmal opening” is proposed. A perizonium, composed of transverse and longitudinal bands, is reported for the first time in the genus Gomphoneis.