Dedicated to Luigi Provasoli on the occassion of his official academic retirement with sincere wishes for contiuned scholarly productivity.
CRYPTOGLENA PIGRA: A EUGLENOID WITH ONE CHLOROPLAST12
Article first published online: 6 APR 2006
Journal of Phycology
Volume 14, Issue 2, pages 160–166, June 1978
How to Cite
Rosowski, J. R. and Lee, K. W. (1978), CRYPTOGLENA PIGRA: A EUGLENOID WITH ONE CHLOROPLAST1. Journal of Phycology, 14: 160–166. doi: 10.1111/j.1529-8817.1978.tb02442.x
- Issue published online: 6 APR 2006
- Article first published online: 6 APR 2006
- Accepted: 2 December 1977.
The taxonomic status of Cryptoglena pigra Ehrb., interpreted from observations based on bright-field microscopy, has been uncertain. Examination with the electron microscope of a clone of C pigra isolated by E. G. Pringsheim reveals certain features which, collectively, are distinctly euglenoid: periplast associated with muciferous bodies and subpellicular microtubules; canal and reservoir with microtubules; one flagellum with a swelling and emergent through a canal, and a second flagellum without a swelling and nonremergent; stigma (eyetpot) closely apprrssed to but not part of the chloroplast; nucleus with permanently condensed chromosomes attached to the inner nuclrar membrane; mitochondria with disc-shaped cristae constricted at the base; chloroplast with thylakoids often in triplets; and paramylon grains in the cytoplasm. Unlike most euglenoids, C. pigra possesses a single chloroplast that in transverse thin sections is U-shaped.