Earth:Lakhanda Group
From HandWiki
| Lakhanda Group Stratigraphic range: 1000-1030 Ma | |
|---|---|
| Type | Group |
| Underlies | Ui Group |
| Overlies | Kerpyl' Group |
| Thickness | ~420 m |
| Location | |
| Region | Sakha Republic |
| Country | Russia |
The Lakhanda Group is a group of late Mesoproterozoic formations from Siberia. It contains several of the earliest eukaryotes which can be placed into modern groups, including the earliest xanthophyte algae, fungi and possibly even the first animals.[1]
Paleobiota
Template:Paleobiota-key-compact
Paleobiota
| Paleobiota | ||||
|---|---|---|---|---|
| Genus | Species | Notes | Images | |
| Palaeovaucheria |
|
Filamentous xanthophyte alga.[2] | ||
| Aimonema |
|
Filamentous fungus, possibly within Ascomycota. May be related to nematophagous fungi, and may even have had a similar lifestyle due to possible worm-like fossils also being found in Lakhanda.[3] | ||
| Mucorites |
|
Fungal zygospores, possibly within Mucorales?[4] | ||
| Eosaccharomyces |
|
Fungal fossils, likely related to modern yeast.[4] | ||
| Mycosphaeroides |
|
Material consists of amoeboid aggregations and individual cells, the genus is likely related to Myxomycetes.[4] | ||
| Fungi indet. |
|
Similar to the Canadian Ourasphaira[1] | ||
| Rugosoopsis |
|
Possible vermiform animal, earliest record of Animalia if this is true.[5] | ||
| Porifera? indet. |
Unapplicable |
Microfossils similar to sponges (more specifically members of Hexactinellida), found on numerous other taxa from the site.[6] | ||
| Lomentunella |
|
Multicellular alga, similar to the modern Ulothrix.[7] | ||
| Palmella |
|
Enigmatic fossil[7] | ||
| Eosolena |
|
Enigmatic filamentous fossil, member of the clade Eosolenides[8] | ||
| Elatera |
|
Enigmatic filamentous fossil, member of the clade Eosolenides[8] | ||
| Itirinda |
|
Enigmatic budding fossil, claimed to have affinities to hydrozoan polyps[9] | ||
| Caudosphaera |
|
Sporangium-like fossil[1] | ||
| Germinosphaera |
|
Sporangium-like fossil[1] | ||
| Jacutinema |
|
Sporangium-like fossil[1] | ||
| Siphonophycus |
|
Cyanobacteria[7] | ||
| Polytrichoides |
|
Cyanobacteria[7] | ||
| Palaeolyngbya |
|
Cyanobacteria[7] | ||
| Chuaria |
|
Widespread enigmatic fossil[7] | ||
| Lakhandia |
|
Acritarch[7] | ||
| Trachyhystricosphaera |
|
Acritarch[7] | ||
| Majasphaeridium |
|
Acritarch[9] | ||
| Radiatosphaera |
|
Acritarch[9] | ||
| Cypandinia |
|
Acritarch[9] | ||
| Valeria |
|
Acritarch[1] | ||
| Fabiformis |
|
Colonial microbes, possibly bacteria?[7] | ||
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Shuvalova, J. V.; Nagovitsin, K. E.; Duda, J.-P.; Parkhaev, P. Yu. (September 2021). "Early Eukaryotes in the Lakhanda Biota (Mesoproterozoic, Southeastern Siberia)—Morphological and Geochemical Evidence". Doklady Biological Sciences 500 (1): 127–132. doi:10.1134/S0012496621050100.
- ↑ Butterfield, Nicholas J. (June 2004). "A vaucheriacean alga from the middle Neoproterozoic of Spitsbergen: implications for the evolution of Proterozoic eukaryotes and the Cambrian explosion". Paleobiology 30 (2): 231–252. doi:10.1666/0094-8373(2004)030<0231:AVAFTM>2.0.CO;2.
- ↑ Hermann, T. N.; Podkovyrov, V. N. (July 2010). "A discovery of riphean heterotrophs in the Lakhanda group of Siberia". Paleontological Journal 44 (4): 374–383. doi:10.1134/S0031030110040027.
- ↑ 4.0 4.1 4.2 Hermann, T. N.; Podkovyrov, V. N. (March 2006). "Fungal remains from the Late Riphean". Paleontological Journal 40 (2): 207–214. doi:10.1134/S0031030106020122.
- ↑ Hermann, T. N.; Podkovyrov, V. N. (January 2007). "Rugosoopsis : a new group of Upper Riphean animals". Geological Society, London, Special Publications 286 (1): 429–431. doi:10.1144/SP286.34.
- ↑ German, T. N.; Podkovyrov, V. N. (May 2012). "Records of a new spongelike group in the Riphean biota". Paleontological Journal 46 (3): 219–227. doi:10.1134/S0031030112030069.
- ↑ 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 German, T. N.; Podkovyrov, V. N. (May 2011). "The role of cyanobacteria in the assemblage of the Lakhanda Microbiota". Paleontological Journal 45 (3): 320–332. doi:10.1134/S0031030111020079.
- ↑ 8.0 8.1 German, Tamara N.; Podkovyrov, Victor N. (September 2009). "New insights into the nature of the Late Riphean Eosolenides". Precambrian Research 173 (1-4): 154–162. doi:10.1016/j.precamres.2009.03.018.
- ↑ 9.0 9.1 9.2 9.3 Hermann, T. N.; Podkovyrov, V. N. (2002). "On the Finds of Riphean Dimorphic Organisms". Paleontological Journal 36 (3): 231-239. https://repository.geologyscience.ru/bitstream/handle/123456789/29014/Herm_02.pdf?sequence=1.
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