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''Maiocercus celticus'' is a species of early 
Originally zoologist
trigonotarbid
The Order (biology), order Trigonotarbida is a group of extinct arachnids whose fossil record extends from the late Silurian to the early Permian (Pridoli epoch, Pridoli to Sakmarian).Dunlop, J. A., Penney, D. & Jekel, D. 2020A summary list of fos ...
arachnid
Arachnids are arthropods in the Class (biology), class Arachnida () of the subphylum Chelicerata. Arachnida includes, among others, spiders, scorpions, ticks, mites, pseudoscorpions, opiliones, harvestmen, Solifugae, camel spiders, Amblypygi, wh ...
from the Upper Carboniferous
The Carboniferous ( ) is a Geologic time scale, geologic period and System (stratigraphy), system of the Paleozoic era (geology), era that spans 60 million years, from the end of the Devonian Period Ma (million years ago) to the beginning of the ...
of Westhoughton
Westhoughton ( ) is a List of towns in England, town and civil parish in the Metropolitan Borough of Bolton, Greater Manchester, England, southwest of Bolton, east of Wigan and northwest of Manchester.Lancashire
Lancashire ( , ; abbreviated ''Lancs'') is a ceremonial county in North West England. It is bordered by Cumbria to the north, North Yorkshire and West Yorkshire to the east, Greater Manchester and Merseyside to the south, and the Irish Sea to ...
, 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
In taxonomy, the scientific classification of living organisms, a synonym is an alternative scientific name for the accepted scientific name of a taxon. The botanical and zoological codes of nomenclature treat the concept of synonymy differently.
...
of ''M. celticus''.
''M. celticus'' is the type species of the genus ''Maiocercus''.
Originally zoologist Reginald Innes Pocock
Reginald Innes Pocock, (4 March 1863 – 9 August 1947) was a British zoologist.
Pocock was born in Clifton, Bristol, the fourth son of Rev. Nicholas Pocock and Edith Prichard. He began showing interest in natural history at St. Edward's ...
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".
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.
See also
*Trigonotarbida
The order Trigonotarbida is a group of extinct arachnids whose fossil record extends from the late Silurian to the early Permian ( Pridoli to Sakmarian).Dunlop, J. A., Penney, D. & Jekel, D. 2020A summary list of fossil spiders and their relative ...
* Anthracomartidae
Anthracomartidae, first described by Haase, 1890, is a family of the extinct arachnid order Trigonotarbida. It is likely to be most closely related to the Archaeomartidae, based on a 2014 cladistic analysis, within the clade (Palaeocharinus (Arch ...
References
Trigonotarbids Carboniferous arachnids Carboniferous arthropods of Europe Pennsylvanian animals of Europe Monotypic prehistoric arachnid genera {{Paleo-arachnid-stub