Gilbertsmithia

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Gilbertsmithia
Scientific classification OOjs UI icon edit-ltr.svg
(unranked): Viridiplantae
Division: Chlorophyta
Class: Chlorophyceae
Order: Sphaeropleales
Family: Scenedesmaceae
Genus: Gilbertsmithia
M.O.P.Iyengar, 1975
Species:
G. grandis
Binomial name
Gilbertsmithia grandis
M.O.P.Iyengar, 1975 [1]

Gilbertsmithia is a genus of green algae in the family Scenedesmaceae, containing the single species Gilbertsmithia grandis. [1] It was named after the American botanist Gilbert Morgan Smith. [2] This remarkable alga has only been recorded once from a muddy rainwater pool in Madras (now Chennai), India. [1]

Gilbertsmithia grandis consists of flattened colonies of cells, termed coenobia. Colonies contain rings of four or eight cells in a ring, akin to beads on a rosary. Cells are uninucleate (with one nucleus) and contain one cup-shaped chloroplast, each with a single pyrenoid in the thicker part of the chloroplast. Colonies are surrounded by a thin layer of mucilage. [2]

Gilbertsmithia grandis reproduces asexually by the formation of autospores. Each cell divides into four or eight protoplasts, and a released via a slit in the mother cell wall. The mother cell wall is retained and becomes angular, and remain attached to each other; therefore, multiple rings may be present on a single colony. [2] Sexual reproduction is not known to occur in this genus. [1]

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References

  1. 1 2 3 4 Guiry, M.D.; Guiry, G.M. "Gilbertsmithia". AlgaeBase . World-wide electronic publication, National University of Ireland, Galway. Retrieved 2023-11-26.
  2. 1 2 3 Iyengar, M.O.P. (1975). "Contributions to our knowledge of South Indian Algae—VIII". Proceedings of the Indian Academy of Science. 81B (1): 29–60.


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