Volvox globator

Volvox globator is a species of green algae of the genus Volvox. It was originally described by Carl Linnaeus in his 1758 work Systema Naturae.[1] In 1856 its sexuality was described by Ferdinand Cohn and is the same as Sphaeroplea annulina.[2] It is colonial flagellate found in freshwaters. The colony consists of thousands of zooids (somatic cells) arranged in a single peripheral layer. each zooids shows two flagella, two or more contractile vacuoles, cup like chloroplast, a single nucleus, a red stigma but no gullet. Nutrition is holophytic. Size of colony increases by binary fission. In the colony the zooids called parthenogonidia repeatedly divide to form daughter colonies which are released from parent colony.

Volvox globator
Scientific classification
Phylum:	Chlorophyta
Class:	Chlorophyceae
Order:	Chlamydomonadales
Family:	Volvocaceae
Genus:	Volvox
Species:	V. globator
Binomial name
Volvox globator L.

References

1. Guiry, M.D.; Guiry, G.M. (2008). "Volvox globator Linnaeus'". AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.
2. http://www.pnf.org/compendium/Ferdinand_Julius_Cohn.pdf%5B%5D

Further reading

• Mast, S. O. (1907). "Light reaction in lower organisms. II. Volvox globator" (PDF). Journal of Comparative Neurology and Psychology. 17 (2): 99–180. doi:10.1002/cne.920170202.
• Mast, S. O. (1919). "Reversion in the sense of orientation to light in the colonial forms, Volvox globator and Pandorina morum". Journal of Experimental Zoology. 27 (3): 367–90. doi:10.1002/jez.1400270304.
• Mast, S. O. (1932). "The rate of adaptation to light and to darkness in Volvox globator". Zeitschrift für Vergleichende Physiologie. 17 (3): 644–58. doi:10.1007/BF00340895.
• Zimmermann, Walter (1925). "Die ungeschlechtliche Entwicklung von Volvox" [Asexual development of Volvox]. Die Naturwissenschaften (in German). 13 (19): 397–402. Bibcode:1925NW.....13..397Z. doi:10.1007/BF01560949.
• Höhn, Stephanie; Hallmann, Armin (2011). "There is more than one way to turn a spherical cellular monolayer inside out: Type B embryo inversion in Volvox globator". BMC Biology. 9: 89. doi:10.1186/1741-7007-9-89. PMC 3324393. PMID 22206406.