Calpionellid: Difference between revisions
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'''Calpionellids''' are an extinct group of [[eukaryote|eukaryotic]] single celled organisms of uncertain affinities. Their fossils are found in marine rocks of [[Upper Jurassic]] to [[Lower Cretaceous]] age.<ref name="Bolli 1989">{{cite book |editor-last=Bolli |editor-first=Hans M. |title=Plankton stratigraphy|year=1989|publisher=Cambridge University Press|location=Cambridge [Cambridgeshire]|isbn=978-0521367196|edition=1st paperback |editor2=Saunders, John B. |editor3=Fancett, Katharina Perch-Nielsen}}</ref> They were [[Plankton|planktonic]] organisms with [[urn]]-shaped, [[Calcite|calcitic]] [[Test (biology)|tests]] that had a widespread distribution across the [[Tethys Ocean]] from the late [[Tithonian]] to the early [[Valanginian]] and were characterised by rapid evolution, and their abundant remains in deep sea sediments from this interval are important as they allow long distance [[Biostratigraphy|biostratigraphic]] correlation and precise dating.<ref>{{Cite book|last=Jain|first=Sreepat|url=http://link.springer.com/10.1007/978-81-322-3962-8|title=Fundamentals of Invertebrate Palaeontology: Microfossils|date=2020|publisher=Springer India|isbn=978-81-322-3960-4|series=Springer Geology|location=New Delhi|language=en|chapter=Calpionellids|doi=10.1007/978-81-322-3962-8|s2cid=209332233 }}</ref> Calpionellids were not confined to the Tethys, as they have also been found in the [[Vaca Muerta]] of northern [[Patagonia]], in what was then the southeastern Pacific.<ref>{{Cite journal|last=Kietzmann|first=Diego A.|date=July 2017|title=Chitinoidellids from the Early Tithonian–Early Valanginian Vaca Muerta Formation in the Northern Neuquén Basin, Argentina|url=https://linkinghub.elsevier.com/retrieve/pii/S0895981117300457|journal=Journal of South American Earth Sciences|language=en|volume=76|pages=152–164|doi=10.1016/j.jsames.2017.03.005|bibcode=2017JSAES..76..152K }}</ref> Calpionellids are divided into two main families, the Chitinoidellidae, which are the earliest members of the group, appearing in the mid Tithonian, characterised by [[microgranular]] [[Lorica (biology)|lorica]]. Calpionellidae appear later, including widespread genera such as ''[[Calpionella]]'' and ''[[Calpionellites]],'' and have combined microgranular and [[hyaline]] lorica. A third family, the Semichitinoidellidae are sometimes recognised.<ref>{{Cite journal|last1=Sallouhi|first1=Houaïda|last2=Boughdiri|first2=Mabrouk|last3=Cordey|first3=Fabrice|date=November 2011|title=Tithonian Chitinoidellids of the South-Tethyan Margin of the Maghreb: New data from northern Tunisia|url=https://linkinghub.elsevier.com/retrieve/pii/S163106831100128X|journal=Comptes Rendus Palevol|language=en|volume=10|issue=8|pages=641–653|doi=10.1016/j.crpv.2011.08.003|bibcode=2011CRPal..10..641S }}</ref> |
'''Calpionellids''' are an extinct group of [[eukaryote|eukaryotic]] single celled organisms of uncertain affinities. Their fossils are found in marine rocks of [[Upper Jurassic]] to [[Lower Cretaceous]] age.<ref name="Bolli 1989">{{cite book |editor-last=Bolli |editor-first=Hans M. |title=Plankton stratigraphy|year=1989|publisher=Cambridge University Press|location=Cambridge [Cambridgeshire]|isbn=978-0521367196|edition=1st paperback |editor2=Saunders, John B. |editor3=Fancett, Katharina Perch-Nielsen}}</ref> They were [[Plankton|planktonic]] organisms with [[urn]]-shaped, [[Calcite|calcitic]] [[Test (biology)|tests]] that had a widespread distribution across the [[Tethys Ocean]] from the late [[Tithonian]] to the early [[Valanginian]] and were characterised by rapid evolution, and their abundant remains in deep sea sediments from this interval are important as they allow long distance [[Biostratigraphy|biostratigraphic]] correlation and precise dating.<ref>{{Cite book|last=Jain|first=Sreepat|url=http://link.springer.com/10.1007/978-81-322-3962-8|title=Fundamentals of Invertebrate Palaeontology: Microfossils|date=2020|publisher=Springer India|isbn=978-81-322-3960-4|series=Springer Geology|location=New Delhi|language=en|chapter=Calpionellids|doi=10.1007/978-81-322-3962-8|s2cid=209332233 }}</ref> Calpionellids were not confined to the Tethys, as they have also been found in the [[Vaca Muerta]] of northern [[Patagonia]], in what was then the southeastern Pacific.<ref>{{Cite journal|last=Kietzmann|first=Diego A.|date=July 2017|title=Chitinoidellids from the Early Tithonian–Early Valanginian Vaca Muerta Formation in the Northern Neuquén Basin, Argentina|url=https://linkinghub.elsevier.com/retrieve/pii/S0895981117300457|journal=Journal of South American Earth Sciences|language=en|volume=76|pages=152–164|doi=10.1016/j.jsames.2017.03.005|bibcode=2017JSAES..76..152K |hdl=11336/20014|hdl-access=free}}</ref> Calpionellids are divided into two main families, the Chitinoidellidae, which are the earliest members of the group, appearing in the mid Tithonian, characterised by [[microgranular]] [[Lorica (biology)|lorica]]. Calpionellidae appear later, including widespread genera such as ''[[Calpionella]]'' and ''[[Calpionellites]],'' and have combined microgranular and [[hyaline]] lorica. A third family, the Semichitinoidellidae are sometimes recognised.<ref>{{Cite journal|last1=Sallouhi|first1=Houaïda|last2=Boughdiri|first2=Mabrouk|last3=Cordey|first3=Fabrice|date=November 2011|title=Tithonian Chitinoidellids of the South-Tethyan Margin of the Maghreb: New data from northern Tunisia|url=https://linkinghub.elsevier.com/retrieve/pii/S163106831100128X|journal=Comptes Rendus Palevol|language=en|volume=10|issue=8|pages=641–653|doi=10.1016/j.crpv.2011.08.003|bibcode=2011CRPal..10..641S }}</ref> |
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[[Category:Alveolata families]] |
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Latest revision as of 03:47, 29 July 2024
| Calpionellid Temporal range: Upper Jurassic to Lower Cretaceous
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| Calpionellids seen in cross section | |
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| Order: | Calpionellida
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Calpionellids are an extinct group of eukaryotic single celled organisms of uncertain affinities. Their fossils are found in marine rocks of Upper Jurassic to Lower Cretaceous age.[1] They were planktonic organisms with urn-shaped, calcitic tests that had a widespread distribution across the Tethys Ocean from the late Tithonian to the early Valanginian and were characterised by rapid evolution, and their abundant remains in deep sea sediments from this interval are important as they allow long distance biostratigraphic correlation and precise dating.[2] Calpionellids were not confined to the Tethys, as they have also been found in the Vaca Muerta of northern Patagonia, in what was then the southeastern Pacific.[3] Calpionellids are divided into two main families, the Chitinoidellidae, which are the earliest members of the group, appearing in the mid Tithonian, characterised by microgranular lorica. Calpionellidae appear later, including widespread genera such as Calpionella and Calpionellites, and have combined microgranular and hyaline lorica. A third family, the Semichitinoidellidae are sometimes recognised.[4]
Naming
[edit]The name is derived from the Greek "κάλπις", meaning "water jug".
References
[edit]- ^ Bolli, Hans M.; Saunders, John B.; Fancett, Katharina Perch-Nielsen, eds. (1989). Plankton stratigraphy (1st paperback ed.). Cambridge [Cambridgeshire]: Cambridge University Press. ISBN 978-0521367196.
- ^ Jain, Sreepat (2020). "Calpionellids". Fundamentals of Invertebrate Palaeontology: Microfossils. Springer Geology. New Delhi: Springer India. doi:10.1007/978-81-322-3962-8. ISBN 978-81-322-3960-4. S2CID 209332233.
- ^ Kietzmann, Diego A. (July 2017). "Chitinoidellids from the Early Tithonian–Early Valanginian Vaca Muerta Formation in the Northern Neuquén Basin, Argentina". Journal of South American Earth Sciences. 76: 152–164. Bibcode:2017JSAES..76..152K. doi:10.1016/j.jsames.2017.03.005. hdl:11336/20014.
- ^ Sallouhi, Houaïda; Boughdiri, Mabrouk; Cordey, Fabrice (November 2011). "Tithonian Chitinoidellids of the South-Tethyan Margin of the Maghreb: New data from northern Tunisia". Comptes Rendus Palevol. 10 (8): 641–653. Bibcode:2011CRPal..10..641S. doi:10.1016/j.crpv.2011.08.003.
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