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IRMNG taxon detailsSigmopollis R.W. Hedlund, 1965 †
marine, fresh,
fossil only
Not documented
Taxonomic remark Transferred to the algae by S.K. Srivastava, Pollen & Spores 26: 521. Jun-Dec 1985. (Index Nominum Genericorum). Treated as...
Taxonomic remark Transferred to the algae by S.K. Srivastava, Pollen & Spores 26: 521. Jun-Dec 1985. (Index Nominum Genericorum). Treated as an acritarch by Schrank, 2003; some forms previously in Micrhystridium, refer that work. Treated as Chlorophyta in IRMNG at this time; Worobiec, 2014 lists this genus as incertae sedis, but notes: The fossil genus Sigmopollis (in Quaternary deposits often determined as Type 128; e.g., van der Wiel 1982, van Geel et al. 1983, 1989, Miola et al. 2006) remains of unknown systematic affinity although these microfossils are valuable palaeoenvironmental indicators and in some samples are very frequent. The Sigmopollis microfossils are believed to be spores of freshwater algae (Srivastava 1984). These microfossils are usually regarded as Cyanobacteria (Cyanophyta) or green algae. Probably at least Sigmopollis laevigatoides is related to Chlorophyta (it resembles e.g. zygospores of the extant Carteria Diesing). Possibly the various species of Sigmopollis have different botanical affinities. ... Species of Sigmopollis are associated with eutrophic to mesotrophic open waters in Holocene deposits. [details]
IRMNG (2025). Sigmopollis R.W. Hedlund, 1965 †. Accessed at: https://www.irmng.org/aphia.php?p=taxdetails&id=1006298 on 2025-04-01
Date action by
basis of record
Farr, E. R.; Zijlstra, G. (eds). (1996-current). Index Nominum Genericorum (ING). A compilation of generic names published for organisms covered by the ICN: International Code of Nomenclature for Algae, Fungi, and Plants. [previously: organisms covered by the International Code for Botanical Nomenclature] (2007 version). , available online at https://naturalhistory2.si.edu/botany/ing/ [details]
basis of record Museum Victoria KEmu database (Oct 2006) [details] verified source for family Schrank, E. (2003). Small acritarchs from the Upper Cretaceous: taxonomy, biological affinities and palaeoecology. <em>Review of Palaeobotany and Palynology.</em> 123(3-4): 199-235., available online at https://doi.org/10.1016/s0034-6667(02)00228-2 note: notes some occurrences are nonmarine [details] verified source for family Worobiec, E. (2014). Fossil zygospores of Zygnemataceae and other microremains of freshwater algae from two Miocene palaeosinkholes in the Opole region, SW Poland. <em>Acta Palaeobotanica.</em> 54(1): 113-157., available online at https://doi.org/10.2478/acpa-2014-0005 [details] name verified source Farr, E. R.; Zijlstra, G. (eds). (1996-current). Index Nominum Genericorum (ING). A compilation of generic names published for organisms covered by the ICN: International Code of Nomenclature for Algae, Fungi, and Plants. [previously: organisms covered by the International Code for Botanical Nomenclature] (2007 version). , available online at https://naturalhistory2.si.edu/botany/ing/ [details] current name source Schrank, E. (2003). Small acritarchs from the Upper Cretaceous: taxonomy, biological affinities and palaeoecology. <em>Review of Palaeobotany and Palynology.</em> 123(3-4): 199-235., available online at https://doi.org/10.1016/s0034-6667(02)00228-2 [details] extant flag source Farr, E. R.; Zijlstra, G. (eds). (1996-current). Index Nominum Genericorum (ING). A compilation of generic names published for organisms covered by the ICN: International Code of Nomenclature for Algae, Fungi, and Plants. [previously: organisms covered by the International Code for Botanical Nomenclature] (2007 version). , available online at https://naturalhistory2.si.edu/botany/ing/ [details] Unreviewed
Descriptive info Miocene. (Index Nominum Genericorum) [details]Taxonomic remark Transferred to the algae by S.K. Srivastava, Pollen & Spores 26: 521. Jun-Dec 1985. (Index Nominum Genericorum). Treated as an acritarch by Schrank, 2003; some forms previously in Micrhystridium, refer that work. Treated as Chlorophyta in IRMNG at this time; Worobiec, 2014 lists this genus as incertae sedis, but notes: The fossil genus Sigmopollis (in Quaternary deposits often determined as Type 128; e.g., van der Wiel 1982, van Geel et al. 1983, 1989, Miola et al. 2006) remains of unknown systematic affinity although these microfossils are valuable palaeoenvironmental indicators and in some samples are very frequent. The Sigmopollis microfossils are believed to be spores of freshwater algae (Srivastava 1984). These microfossils are usually regarded as Cyanobacteria (Cyanophyta) or green algae. Probably at least Sigmopollis laevigatoides is related to Chlorophyta (it resembles e.g. zygospores of the extant Carteria Diesing). Possibly the various species of Sigmopollis have different botanical affinities. ... Species of Sigmopollis are associated with eutrophic to mesotrophic open waters in Holocene deposits. [details] |
