Strabopidae: Difference between revisions
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The order Strabopida contains three valid genera and one doubtful, ''[[Khankaspis]]'', ''[[Paleomerus]]'', ''[[Parapaleomerus]]'' and ''[[Strabops]]'', all assigned in the family Strabopidae.<ref name="3h">{{cite journal|title=Trilobite and xiphosuran affinities for putative aglaspidid arthropods ''Caryon'' and ''Drabovaspis'', Upper Ordovician, Czech Republic|author=Javier Ortega-Hernández|author2=Simon J. Braddy|author3=Štěpán Rak|journal=Lethaia|date=9 March 2010|volume=43|issue=3|pages=427–431|doi=10.1111/j.1502-3931.2010.00216.x}}</ref> Previously, it also contained the genera ''[[Caryon]]'', ''[[Lemoneites]]'' and ''[[Neostrabops]]'', but after a study, they were reassigned as a [[trilobite]], a [[Glyptocystitida|glyptocystitid]] [[echinoderm]] and a [[cheloniellid]] arthropod, respectively.<ref name="3h" /> |
The order Strabopida contains three valid genera and one doubtful, ''[[Khankaspis]]'', ''[[Paleomerus]]'', ''[[Parapaleomerus]]'' and ''[[Strabops]]'', all assigned in the family Strabopidae.<ref name="3h">{{cite journal|title=Trilobite and xiphosuran affinities for putative aglaspidid arthropods ''Caryon'' and ''Drabovaspis'', Upper Ordovician, Czech Republic|author=Javier Ortega-Hernández|author2=Simon J. Braddy|author3=Štěpán Rak|journal=Lethaia|date=9 March 2010|volume=43|issue=3|pages=427–431|doi=10.1111/j.1502-3931.2010.00216.x}}</ref> Previously, it also contained the genera ''[[Caryon]]'', ''[[Lemoneites]]'' and ''[[Neostrabops]]'', but after a study, they were reassigned as a [[trilobite]], a [[Glyptocystitida|glyptocystitid]] [[echinoderm]] and a [[cheloniellid]] arthropod, respectively.<ref name="3h" /> |
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Paleomeridae was also previously included as a family, but after the discovery of a fourth ''Paleomerus'' [[Biological specimen|specimen]] and its study, Paleomeridae was synonymized into Strabopidae.<ref name=":1">{{cite journal|title=A new specimen of ''Paleomerus hamiltoni'' (Arthropoda; Arachnomorpha)|author=O. Erik Tetlie|author2=Rachel A. Moore|journal=Transactions of the Royal Society of Edinburgh: Earth Sciences|volume=94|issue=3|pages=195–198|year=2004|doi=10.1017/S0263593300000602|citeseerx = 10.1.1.717.1248|s2cid=129086749}}</ref> Although often suggested to be closely related to [[Aglaspidida|aglaspidids]] due to their similar morphology, their exact phylogenetic placement is uncertain due to the poor preservation of all known strabopids. A 2013 attempt to place them in a phylogenetic analysis recovered them as part of a [[polytomy]] with [[megacheira]]ns, [[Marrellomorpha|marrellomorphs]], [[crustacean]]s and [[artiopoda]]ns.<ref name=":0">{{Cite journal |last=Ortega-Hernández |first=Javier |last2=Legg |first2=David A. |last3=Braddy |first3=Simon J. |date=February 2013 |title=The phylogeny of aglaspidid arthropods and the internal relationships within Artiopoda |url=https://onlinelibrary.wiley.com/doi/10.1111/j.1096-0031.2012.00413.x |journal=Cladistics |language=en |volume=29 |issue=1 |pages=15–45 |doi=10.1111/j.1096-0031.2012.00413.x}}</ref> Still, strabopids are often classified as part of the clade [[Arachnomorpha]].<ref name=":1" /> |
Paleomeridae was also previously included as a family, but after the discovery of a fourth ''Paleomerus'' [[Biological specimen|specimen]] and its study, Paleomeridae was synonymized into Strabopidae.<ref name=":1">{{cite journal|title=A new specimen of ''Paleomerus hamiltoni'' (Arthropoda; Arachnomorpha)|author=O. Erik Tetlie|author2=Rachel A. Moore|journal=Transactions of the Royal Society of Edinburgh: Earth Sciences|volume=94|issue=3|pages=195–198|year=2004|doi=10.1017/S0263593300000602|citeseerx = 10.1.1.717.1248|s2cid=129086749}}</ref> Although often suggested to be closely related to [[Aglaspidida|aglaspidids]] due to their similar morphology, their exact phylogenetic placement is uncertain due to the poor preservation of all known strabopids. A 2013 attempt to place them in a phylogenetic analysis recovered them as part of a [[polytomy]] with [[megacheira]]ns, [[Marrellomorpha|marrellomorphs]], [[crustacean]]s and [[artiopoda]]ns.<ref name=":0">{{Cite journal |last=Ortega-Hernández |first=Javier |last2=Legg |first2=David A. |last3=Braddy |first3=Simon J. |date=February 2013 |title=The phylogeny of aglaspidid arthropods and the internal relationships within Artiopoda |url=https://onlinelibrary.wiley.com/doi/10.1111/j.1096-0031.2012.00413.x |journal=Cladistics |language=en |volume=29 |issue=1 |pages=15–45 |doi=10.1111/j.1096-0031.2012.00413.x}}</ref> Still, strabopids are often classified as part of the clade [[Arachnomorpha]].<ref name=":1" /> In fact, Dunlop & Selden (1998) defined ''Paleomerus'' as "perhaps the best model of a primitive arachnomorph".<ref>{{cite book|title=The early history and phylogeny of the chelicerates|last1=Dunlop|first1=J. A.|last2=Selden|first2=Paul A.|year=1998|journal=Arthropod Relationships. The Systematics Association Special Volume Series|volume=55|page=229|doi=10.1007/978-94-011-4904-4_17|isbn = 978-94-010-6057-8}}</ref> |
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==References== |
==References== |
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Revision as of 11:00, 17 June 2023
| Strabopidae Temporal range:
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|---|---|
| |
| Fossil of Strabops thacheri. | |
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| (unranked): | |
| Order: | †Strabopida Hou & Bergström, 1997
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| Family: | †Strabopidae Gerhardt, 1932
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| Type species | |
| †Strabops thacheri Beecher, 1901
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| Genera | |
Strabopidae is the only family of the order Strabopida, an extinct group of arthropods known from the Cambrian period.[1]
The order Strabopida contains three valid genera and one doubtful, Khankaspis, Paleomerus, Parapaleomerus and Strabops, all assigned in the family Strabopidae.[2] Previously, it also contained the genera Caryon, Lemoneites and Neostrabops, but after a study, they were reassigned as a trilobite, a glyptocystitid echinoderm and a cheloniellid arthropod, respectively.[2]
Paleomeridae was also previously included as a family, but after the discovery of a fourth Paleomerus specimen and its study, Paleomeridae was synonymized into Strabopidae.[3] Although often suggested to be closely related to aglaspidids due to their similar morphology, their exact phylogenetic placement is uncertain due to the poor preservation of all known strabopids. A 2013 attempt to place them in a phylogenetic analysis recovered them as part of a polytomy with megacheirans, marrellomorphs, crustaceans and artiopodans.[1] Still, strabopids are often classified as part of the clade Arachnomorpha.[3] In fact, Dunlop & Selden (1998) defined Paleomerus as "perhaps the best model of a primitive arachnomorph".[4]
References
- ^ a b Ortega-Hernández, Javier; Legg, David A.; Braddy, Simon J. (February 2013). "The phylogeny of aglaspidid arthropods and the internal relationships within Artiopoda". Cladistics. 29 (1): 15–45. doi:10.1111/j.1096-0031.2012.00413.x.
- ^ a b Javier Ortega-Hernández; Simon J. Braddy; Štěpán Rak (9 March 2010). "Trilobite and xiphosuran affinities for putative aglaspidid arthropods Caryon and Drabovaspis, Upper Ordovician, Czech Republic". Lethaia. 43 (3): 427–431. doi:10.1111/j.1502-3931.2010.00216.x.
- ^ a b O. Erik Tetlie; Rachel A. Moore (2004). "A new specimen of Paleomerus hamiltoni (Arthropoda; Arachnomorpha)". Transactions of the Royal Society of Edinburgh: Earth Sciences. 94 (3): 195–198. CiteSeerX 10.1.1.717.1248. doi:10.1017/S0263593300000602. S2CID 129086749.
- ^ Dunlop, J. A.; Selden, Paul A. (1998). The early history and phylogeny of the chelicerates. Vol. 55. p. 229. doi:10.1007/978-94-011-4904-4_17. ISBN 978-94-010-6057-8.
{{cite book}}:|journal=ignored (help)
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