It is likely that Tenticospirifer, that itself appeared during early Givetian, includes the ancestor of Cyrtospirifer. Cyrtospirifer first occurs in western Europe in the Late Givetian. Tenticospirifer has a relatively narrow hinge line and an inflated and thick shell in common with two of the oldest species known, C. verneuiliformis and C. aperturatus. This group dominated during the late Givetian, but was replaced by other species, such as C. syringothyriformis and C. verneuili which have wide hinge lines and thinner shells.[2]
Descriptionedit
Cyrtospirifer has a medium to large sized shell, wider than long.
Cyrtospirifer verneuili, 24mm long and about 60mm wide, brachial valve
^ abRémy Gourvennec (2019). "Silurian-Devonian Spiriferida and Spiriferinida (Brachiopods) from the Tindouf Basin (Algeria)". Palaeontographica Abteilung A. 313 (4–6): 81–149. Bibcode:2019PalAA.313...81G. doi:10.1127/pala/2019/0083.
^Ma, Xueping; Day, Jed (2003). "Revision of Selected North American and Eurasian Late Devonian (Frasnian) species of Cyrtospirifer and Regelia (Brachiopoda)". Journal of Paleontology. 77 (2): 267–292. doi:10.1666/0022-3360(2003)077<0267:rosnaa>2.0.co;2.
cyrtospirifer, extinct, genus, brachiopods, fossils, present, middle, upper, devonian, temporal, range, upper, givetian, lower, famennian, preꞒ, verneuili, from, namur, belgium, upper, devonian, scientific, classification, domain, eukaryota, kingdom, animalia,. Cyrtospirifer is an extinct genus of brachiopods The fossils are present in the Middle and Upper Devonian CyrtospiriferTemporal range Upper Givetian Lower Famennian PreꞒ Ꞓ O S D C P T J K Pg N Cyrtospirifer verneuili from Namur Belgium Upper Devonian Scientific classification Domain Eukaryota Kingdom Animalia Phylum Brachiopoda Class Rhynchonellata Order Spiriferida Family Cyrtospiriferidae Genus CyrtospiriferNalivkin 1924 Species C verneuili Murchison 1840 type Spirifer verneuili S lonsdaliiC ainosawensis Tazawa Inose amp Kaneko 2017C aouinetensis Gourvennec 2019 1 C archiaci Murchison 1840 C chemungensis Conrad 1842 Delthyris chemungensis C altiplicusC choanjiensis Tazawa 2017C conoideus Roemer 1843 C disjunctus Sowerby 1840 C inermis Hall 1843 Delthyris inermisC hornellensis Greiner 1957C kharaulakhensis Fredericks 1919C loonesi Brice 2002C mylaensis Sokiran 2006C placitus Stainbrook 1945C preshoensis Greiner 1957C robardeti Gourvennec 2019 1 C rudkinensis Sokiran 2006C schelonicus Nalivkin 1941C syringothyriformis Paeckelmann 1942 C tenticulum Verneuil 1845 Spirifer tenticulumC whitneyi Hall 1858 Contents 1 Taxonomy 2 Description 3 Reassigned species 4 ReferencesTaxonomy editIt is likely that Tenticospirifer that itself appeared during early Givetian includes the ancestor of Cyrtospirifer Cyrtospirifer first occurs in western Europe in the Late Givetian Tenticospirifer has a relatively narrow hinge line and an inflated and thick shell in common with two of the oldest species known C verneuiliformis and C aperturatus This group dominated during the late Givetian but was replaced by other species such as C syringothyriformis and C verneuili which have wide hinge lines and thinner shells 2 Description editCyrtospirifer has a medium to large sized shell wider than long nbsp Cyrtospirifer verneuili 24mm long and about 60mm wide brachial valve nbsp pedicle valve nbsp lateral nbsp posterior nbsp anteriorReassigned species editC glaucus Regelia glaucaReferences edit a b Remy Gourvennec 2019 Silurian Devonian Spiriferida and Spiriferinida Brachiopods from the Tindouf Basin Algeria Palaeontographica Abteilung A 313 4 6 81 149 Bibcode 2019PalAA 313 81G doi 10 1127 pala 2019 0083 Ma Xueping Day Jed 2003 Revision of Selected North American and Eurasian Late Devonian Frasnian species of Cyrtospirifer and Regelia Brachiopoda Journal of Paleontology 77 2 267 292 doi 10 1666 0022 3360 2003 077 lt 0267 rosnaa gt 2 0 co 2 nbsp Paleontology portal nbsp This brachiopod related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Cyrtospirifer amp oldid 1218540691, wikipedia, wiki, book, books, library,
