Flexicalymene: Difference between revisions
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Revision as of 12:04, 23 February 2021
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| Flexicalymene tazarensis | |
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| Genus: | †Flexicalymene
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Flexicalymene Shirley, 1936,[1]is a genus of trilobites belonging to the order Phacopida, suborder Calymenina and Family Calymenidae. Flexicalymene specimens can be mistaken for Calymene, Gravicalymene, Diacalymene and a few other Calymenina genera. They are used as an index fossil in the Ordovician. Ohio and North America are particularly known for being rich with Flexicalymene fossils.
Type species
By original designation, Calymene blumenbachii var. Caractaci Salter, 1865 from the Marshbrookian, Dalmanella unguis Biozone (Caradoc Series) of Marshwood Quarry, near Marshbrook, Shropshire, England.[2]
Other species
- Flexicalymene cambrensis (Salter, 1865), from the Lower Llandeilo Group of Llan Mill, near Narberth, Dyfed, Wales.
- Flexicalymene acantha Bancroft, 1949, from the Harnage Shale Formation (Harnagian Stage), near Horderley, Shropshire, England.[3]
- Flexicalymene incerta Barrande, 1852.[4] Found only at Lower part of wooded slope above railroad facing Přeštínská Railway Station (Ordovician of Czech Republic). Assigned by Dean (1963).
- Flexicalymene planimarginata (Reed, 1906), from the Lower Longvillian (Caradoc Series) of Ynys Galed, 4 km west of Dolbenmaen, Gwynedd, Wales.[5]
- Flexicalymene cavei Price, 1974, from a Cautleyan marine limestone in the Sholeshook Formation of Moldin, near Llanddowror, Carmarthenshire, Wales.[6]
- Flexicalymene shirleyi Tripp, 1954. Caradoc marine mudstone in the Craighead Formation (Balclatchie Group), Caradoc Series, of Craighead Quarry near Girvan, Ayrshire, Scotland.[7]
- Flexicalymene scotica Lamont, (1949, p. 315, P1. 18, figs. 6, 7), uppermost Ordovician (Hirnantian), Girvan, Ayrshire, Scotland.[8]
- Flexicalymene croneisi Roy, 1941. Upper Ordovician, Baffin Island, (Ontario).<ref>Roy, S. K. 1941. The Upper Ordovician fauna of Frobisher Bay, Baffin Island. Field Museum of Natural History. Geology, Memoirs 2: 1 - 212.
- Flexicalymene meeki (Ohio, Kentucky and Indiana).
- Flexicalymene retrorsa (Ohio, Kentucky and Indiana).
- Flexicalymene granulosa (Ohio, Kentucky and Quebec).
- Flexicalymene senaria (Quebec, Vermont and New York).
- Flexicalymene ouzregui Ordovician, Morocco.
- Flexicalymene tazarensis Ordovician, Morocco.
Gallery
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Flexicalymene meeki; Waynesville Formation; Upper Ordovician; Caesar Creek, Ohio. -
Flexicalymene meeki; Waynesville Formation; Upper Ordovician; Caesar Creek, Ohio. -
F. meeki -
Flexicalymene species on display at State Museum of Pennsylvania. Specimen is approximately 3 cm long -
Rolled F. ouzregui
References
- ^ "†Flexicalymene Shirley 1936 (trilobite)". Paleobiology Database. Retrieved 21 August 2011.
- ^ Salter, J. W. 1865. A monograph of the British trilobites from the Cambrian, Silurian and Devonian formations. Monograph of the Palaeontographical Society, 81 - 128, pls. 17 - 14.
- ^ Dean, W. T., 1963, The Ordovician trilobite faunas of South Shropshire, III; British Mus. Nat. History Bull., Geology, v. 7, no. 8, p. 216 , pl. 37, figs. 1, 3 - 6, 14.
- ^ BARRANDE, J. 1852. Systême silurien du centre de la Bohême: lère partie, Crustacés: Trilobites. 935 pp. Privately published, Prague & Paris.
- ^ Reed. 1906. The Lower Palaeozoic trilobites of the Girvan district, Ayrshire. Part 3. Monographs of the Palaeontographical Society, 97 - 186, pls. 14 - 20.
- ^ Price, D. 1974. Trilobites from the Sholeshook Limestone (Ashgill) of South Wales. Palaeontology 17 (4): 841 - 868.
- ^ Tripp, R. P. 1954. Caradocian trilobites from the mudstones at Craighead Quarry, near Girvan, Ayrshire. Transactions of the Royal Society of Edinburgh 62 (3): 655 - 693.
- ^ Owen, A. W. 1986. The uppermost Ordovician (Hirnantian) trilobites of Girvan, SW Scotland with a review of coeval trilobite faunas. Transactions of the Royal Society of Edinburgh 77: 231 - 239.
External links
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