Biology:Maiocercus
| Maiocercus | |
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| Fossil of Maiocercus celticus located in Musee d'Histoire Naturelle, Brussels, Belgium. | |
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| Kingdom: | Animalia
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| Genus: | ✝Maiocercus Pocock, 1902
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| Species: | ✝M. celticus
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Maiocercus celticus is a species of early trigonotarbid arachnid from the Upper Carboniferous of Westhoughton, Lancashire, UK. The species was first described in 1902, with a "new species" being described in 1911 (M. orbicularis) which has been proven as being a junior synonym of M. celticus.[1][2]
M. celticus is the type species of the genus Maiocercus.[3]
Originally zoologist Reginald Innes Pocock compared M. celticus to Brachypyge, with later evidence showing that Brachypyge had "opisthosoma which were much longer than wide; with the pleural laminæ of the second and third pleura-bearing terga being inclined slightly backwards" (Brachypyge) with Maiocercus having the “opisthosoma much wider than long; the pleural laminæ of the first, second, third, and fourth sterna being inclined slightly forwards”.[4]
The original drawing which showed Maiocercus described a pitting on the underside of the slightly forwarded laminæ, with a non-uniform concavity on the outer margins of them. The concavity is most well-marked in the fifth, sixth, seventh and eighth somites, with the opposite happening on the second, third and fourth somites.[5]
See also
References
- ↑ Dunlop, Jason A.; Horrocks, Carl A. (1996). "A new specimen of the Carboniferous trigonotarbid arachnid Maiocercus celticus (Pocock 1902) from Lancashire, UK". Proceedings of the Yorkshire Geological Society 51: 23–31. doi:10.1144/pygs.51.1.23. https://www.lyellcollection.org/doi/10.1144/pygs.51.1.23.
- ↑ Craven, D. J.; Dunlop, J. A. (2008). "The holotype of the trigonotarbid arachnid Maiocercus orbicularis Gill, 1911, a junior synonym of M. Celticus (Pocock, 1902)". Proceedings of the Yorkshire Geological Society 57: 61–62. doi:10.1144/pygs.57.1.61.
- ↑ Yorkshire Geological Society. Yorkshire Geological Society. September 17, 2009. https://books.google.com/books?id=P_DiAAAAMAAJ&q=Maiocercus. Retrieved August 12, 2022.
- ↑ Gill, E. Leonard (1911). "II.—A Carboniferous Arachnid from Lancashire". Geological Magazine 8 (9): 395–398. doi:10.1017/S0016756800116383. Bibcode: 1911GeoM....8..395G. https://www.cambridge.org/core/journals/geological-magazine/article/abs/iia-carboniferous-arachnid-from-lancashire/A6731122CDBA2AD4F6E9CEA20E307ABC.
- ↑ Geological Magazine. Cambridge University Press. July 10, 2015. https://books.google.com/books?id=mw5KAQAAMAAJ&q=Maiocercus. Retrieved August 12, 2022.
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