Solenopora

Solenopora
Temporal range: Cambrian–Tertiary[1]
Fossils of Solenopora species
Scientific classification
Phylum: Rhodophyta
Class: Florideophyceae
Stem group: Corallinales
Family: Solenoporaceae
Pia, 1927
Genus: Solenopora
Species
  • Solenopora spongiodes Pia, 1927
  • Solenopora guangxiensis Wu 1991
  • Solenopora jurassica Brown 1894
  • Solenopora rectangulata Senowbari-Daryan et al. 2008

[2]

The extinct Solenoporaceae have traditionally been interpreted as a group of red algae ancestral to the Corallinales.[3]

The genus from which they take their name, Solenopora, originates in the Ordovician.[4] Unlike the Corallinaceae, this family has large vegetative cells and an undifferentiated thallus.[4] Additionally there are external, non-calcified sporangia.[5]

The differences in structure suggest that the holotype is not an alga at all, but rather is a chaetetid sponge. Post-Palaeozoic specimens therefore require re-classification.[6] However, some algal taxa are still classified within the genus.[7]

Some specimens of algal Solenopora retain an original pink colouration, which is banded with growth stages of the fossil; this is produced by boron-containing hydrocarbons.[7]

The solenoporaceae mineralized with calcite.[8]

Other genera within the Solenoporaceae

Although the following other genera have been included in this family, their status is uncertain due to the loose definition of the family.[2][2] [6]

See also

References

  1. ↑ Wright, V. P. (1 May 1985). "Seasonal Banding in the Alga Solenopora jurassica from the Middle Jurassic of Gloucestershire, England". Journal of Paleontology (Journal of Paleontology, Vol. 59, No. 3) 59 (3): 485–792. doi:10.2307/1304992. ISSN 0022-3360. JSTOR 1304992.
  2. 1 2 3 Paleobiology Database
  3. ↑ Johnson, J. H. (May 1956). "Ancestry of the Coralline Algae". Journal of Paleontology (Paleontological Society) 30 (3): 563–567. ISSN 0022-3360. JSTOR 1300291. PMID 1300291.
  4. 1 2 Blackwell, W. H.; Marak, J. H.; Powell, M. J. (1982). "THE IDENTITY AND REPRODUCTIVE STRUCTURES OF A MISPLACED SOLENOPORA (RHODOPHYCOPHYTA) FROM THE ORDOVICIAN OF SOUTHWESTERN OHIO AND EASTERN INDIANA". Journal of Phycology 18 (4): 477. doi:10.1111/j.0022-3646.1982.00477.x.
  5. ↑ Lee, R. E. (1999). Phycology. ISBN 978-0-521-63883-8.
  6. 1 2 Riding, R. (2004). "Solenopora is a Chaetetid Sponge, Not an Alga". Palaeontology 47: 117–122. doi:10.1111/j.0031-0239.2004.00351.x.
  7. 1 2 Wolkenstein, K.; Gross, J. H.; Falk, H. (2010). "Boron-containing organic pigments from a Jurassic red alga". Proceedings of the National Academy of Sciences 107 (45): 19374. Bibcode:2010PNAS..10719374W. doi:10.1073/pnas.1007973107.
  8. ↑ Cozar, P.; Vachard, D. (2006). "A new Mississippian red alga from south-western Spain". Geobios 39: 791. doi:10.1016/j.geobios.2005.09.002.
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