Ivanovia
Temporal range: Pennsylvanian-Triassic
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Scientific classification Edit this classification
(unranked): Viridiplantae
Division: Chlorophyta
Class: Ulvophyceae
Order: Bryopsidales
Family: Codiaceae
Genus: †Ivanovia
Khvorova 1946
Species[1][2][3]

Ivanovia permica
Ivanovia tebagaensis
Ivanovia tenuissima
Ivanovia triassica

Ivanovia is an extinct genus of marine green algae belonging to the order Bryopsidales and family Codiaceae. Species belonging to the genus lived from the Pennsylvanian to the Permian and have been found in the Moscow basin, North America, Italy, Tunisia, and China.[1][4][2][3]

Members of the genus have thalli (leaflike photosynthetic structures) that are cyathiform (cuplike in shape.) There are indications that asexual reproduction took place through budding of the thalli.[2] Sexual reproduction also took place, through reproductive structures in stalked outgrowths of the thalli (oogonia and gametangia, the female and male reproductive structures of green algae.)[3]

Bioherms (fossil algal mounds) constructed by Ivanovia are prominent in the Paradox Formation of the Colorado Plateau, where they are important petroleum reservoirs.[5][6]

It is possible that Ivanovia is a taphotaxon of Anchicondium or Eugonophyllum; that is, a characteristic diagenetic alteration of an original fossil organism that lacks taxonomic significance.[7]

References

  1. 1 2 "Ivanovia Khvorova 1946 (green algae)". Fossilworks. Macquarie University. 2007. Retrieved 17 December 2021.
  2. 1 2 3 Torres, Andrew M. (1995). "Ivanovia tebagaensis Was a Cyathiform Permian Codiacean Membranous Alga with Dimorphic Cortices". Journal of Paleontology. 69 (2): 381–387. doi:10.1017/S0022336000034703. JSTOR 1306267. S2CID 87160638.
  3. 1 2 3 Torres, Andrew M. (1 January 2003). "Sexual reproductive structures in the green alga Ivanovia triassica". Lethaia. 36 (1): 33–40. doi:10.1080/00241160310001236.
  4. ↑ Khvorova, I.V. (1946). "A new genus of algae from the middle Carboniferous deposits of the Moscow Basin". Comptes Rendus de l'Académie des Sciences de l'URSS. 23: 737–739.
  5. ↑ Baars, D. L.; Torres, Andrew M. (October 1991). "Late Paleozoic Phylloid Algae: A Pragmatic Review". PALAIOS. 6 (5): 513. Bibcode:1991Palai...6..513B. doi:10.2307/3514989. JSTOR 3514989.
  6. ↑ Fillmore, Robert (2010). Geological evolution of the Colorado Plateau of eastern Utah and western Colorado, including the San Juan River, Natural Bridges, Canyonlands, Arches, and the Book Cliffs. Salt Lake City: University of Utah Press. pp. 56–57. ISBN 9781607810049.
  7. ↑ Corrochano, Diego; Vachard, Daniel (September 2014). "Remarks on the Cortical Structure of Late Paleozoic "Phylloid Algae"". Journal of Paleontology. 88 (5): 1019–1030. doi:10.1017/S0022336000057620. S2CID 232346413.


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