A new morphotype of chrysophycean stomatocyst from the pond of Peter the Great Botanical Garden (Saint Petersburg)


T. V. Safronova


DOI: https://doi.org/10.31111/nsnr/2015.49.47


Abstract

The paper deals with the problem of identifying chrysophycean stomatocysts. An historical essay of classification schemes for chrysophycean stomatocysts is presented. It is noted that the stomatocysts are widely used in palaeolimnological studies. A new 395/13 morphotype of a chrysophycean stomatocyst from the pond of Peter the Great Botanical Garden is described on the basis of plankton samples. The stomatocyst is spherical (5.3 μm diam.) and has a short cylindrical collar (1.8 μm diam., 0.2 μm high), with a conical pore (0.3 μm diam.). The entire stomatocyst surface is covered with rounded scabrae 0.1–0.2 μm in diameter. Morphology of the new stomatocyst morphotype was studied and its original micrograph was made with a scanning electron microscope.


Keywords: Chrysophyta, stomatocyst, electron-microscopic study


Section: Algae


How to cite

Safronova T. V. 2015. A new morphotype of chrysophycean stomatocyst from the pond of Peter the Great Botanical Garden (Saint Petersburg). Novosti Sist. Nizsh. Rast. 49: 47–51. https://doi.org/10.31111/nsnr/2015.49.47


References

Cronberg G. 1986. Chrysophycean cysts and scales in lake sediments: a review. Chrysophytes. Aspects and problems. New York: 281–315.

Cronberg G., Sandgren C. D. 1986. A proposal for the development of standardized nomenclature and terminology for chrysophycean statospores. Chrysophytes. Aspects and problems. New York: 317–328.

Deflandre G. 1936. Les flagellés fossils. Aperçu biologique et paleolimnologique. Role géologique. Actual. Sci. Industr. Expos. Géol. Paris: 8–97.

Duff K. E., Zeeb B. A., Smol J. P. 1995. Atlas of Chrysophycean cysts. Developm. Hydrobiol. Vol. 99. Dordrecht: 189 p. https://doi.org/10.1007/978-94-017-0809-8

Hansen P. 2001. Chrysophyte stomatocysts in the Azores — biogeographical implications and 110 new morphotypes. Opera Bot. 138: 1–96.

Leventhal E. A. 1970. The Chrysomonadina. Trans. Amer. Philos. Soc. 60: 123–142.

Linnaeus C. 1751. Philosophia botanica in qua explicantur fundamenta botanica cum definitionibus partium, exemplis terminorum, observationibus rariorum, adjectis figuris aeneis. Stockholmiae: 362 p. https://doi.org/10.5962/bhl.title.37652

Nygaard G. 1956. Ancient and recent flora of diatoms and chrysophyceae in Lake Gribsø. Folia Limnol. Scand. 8: 32–93.

Safronova T. V. 2014. Seasonal changes of taxonomic composition of Chrysophycean algae (Chrysophyceae, Synurophyceae) in the ponds of Botanical garden BIN RAS (St.-Petersburg). Bot. Zhurn. 99(4): 443–458. (In Russ. with Engl. summary).

Sandgren C. D. 1983. Survival strategies of chrysophycean flagellates: reproduction and the formation of resistant resting cysts. Survival strategies of the algae. New York: 23–48.

Sandgren C. D., Carney H. J. 1983. A flora of fossil Chrysophycean stomatocysts from the recent sediments of Frains Lake, Michigan, USA. Nova Hedwigia. 38: 129–163.

Wilkinson A. N., Zeeb B. A., Smol J. P. 2001. Atlas of chrysophycean cysts. Developm. Hydrobiol. Vol. 157. Dordrecht: 169 p. https://doi.org/10.1007/978-94-017-0811-1

Zeeb B. A., Duff K. E., Smol J. P. 1990. Morphological descriptions and stratigraphic profiles of chrysophycean stomatocysts from the recent sediments of Little Round Lake, Ontario. Nova Hedwigia. 51: 361–380.