Leiorhynchus Explained

Leiorhynchus is an extinct genus of brachiopod belonging to the order Rhynchonellida and family Leiorhynchidae.^[1] Specimens have been found in South America, North America, and Russia in beds of middle Devonian to Mississippian age (372 to 325 million years old).^[2] The genus may have been adapted to dysaerobic environments, colonizing areas of reduced oxygen concentrations rich in organic matter.^[3] The genus has been used as an index fossil in North America.^[4]

Species

• L. carboniferum^[2]
• L. castanea Meek 1868^[5]
• L. hippocastanea Crickmay 1960^[5]
• L. kelloggi Hall 1867^[6]
• L. mesacostale Hall 1843^[5]
• L. miriam Johnson 1971^[7]
• L. quadracostatus Vanuxem 1842^[8]
• L. ripheicus Stepanov 1948^[9]
• L. rockymontanum Marcou 1858^[10]

Notes and References

1. Book: A. . Williams . C. H. C. . Brunton . S. J. . Carlson . F. . Alvarez . R. B. . Blodgett . A. J. . Boucot . P. . Copper . A. S. . Dagys . R. E. . Grant . Y.-G. . Jin . D. I. . MacKinnon . M. O. . Mancenido . E. F. . Owen . J.-Y. . Rong . N. M. . Savage . D.-L. . Sun . 2002 . 4 . Treatise on Invertebrate Paleontology H: Brachiopoda . 921–1688.
2. Laudon . L.R. . Chronic . B.J. Jr. . Mississippian Rocks of Meramec Age Along Alcan Highway, Northern British Columbia . AAPG Bulletin . 1947 . 31 . 1608–1618 . 10.1306/3D933A37-16B1-11D7-8645000102C1865D.
3. Thompson . Joel B. . Newton . Cathryn R. . Ecological Reinterpretation of the Dysaerobic Leiorhynchus Fauna: Upper Devonian Geneseo Black Shale, Central New York . PALAIOS . 1987 . 2 . 3 . 274 . 10.2307/3514677. 3514677 . 1987Palai...2..274T .
4. Paul . Sartenaer . Two new North American Givetian Rhynchonellid (Brachiopod) zones . Annales de la Société géologique de Belgique . 117 . 1994 . 1 . 245–257 . 11 January 2022 .
5. Johnson . J. G. . Taghanic Onlap and the End of North American Devonian Provinciality . Geological Society of America Bulletin . 1970 . 81 . 7 . 2077 . 10.1130/0016-7606(1970)81[2077:TOATEO]2.0.CO;2. 1970GSAB...81.2077J .
6. Morphology and Paleoecology of the Brachiopod Leiorhynchus kelloggi Hall, Middle Devonian, Ohio, Michigan, Ontario . Egbert G. . Driscoll . Donald D. . Hall . David G.. Nussmann . Journal of Paleontology . 39 . 5 . 1965 . 916–933 . 3555313.
7. J. G. . Johnson . 1971 . Lower Givetian brachiopods from Central Nevada . Journal of Paleontology . 45 . 2 . 301–326.
8. Redescription of Leiorhynchus quadracostatus (Vanuxem), Type Species of Leiorhynchus Hall, 1860 (Rhynchonellacea) . Paul . Sartenaer . Journal of Paleontology . 35 . 5 . 1961 . 963–976 . 1301183.
9. V. I. . Ustritsky . G. E. . Chernyak . 1963 . Biostratigrafiya i Brakhiopody Verknego Paleozoya Taimyra [Biostratigraphy and Brachiopods of the upper Paleozoic of Taimyr] . Trudy Nauchno-Issledoratel'skogo Instituta Geologii Arktiki . 134 . 1–139.
10. J. . Chronic . 1953 . Part II, Invertebrate paleontology (excepting fusulinids and corals), in Upper Paleozoic of Peru . Geological Society of America Memoir . 58 . 43–165.