Leptaena
{{Short description|Genus of paleozoic brachiopods}}
{{Automatic taxobox
| fossil_range = {{fossil range|Darriwilian|Emsian|latest=Tournaisian}}
| image = Leptaena romboidalis 4.jpg
| image_caption = Leptaena rhomboidalis
| taxon = Leptaena
| authority = Dalman, 1828
| type_species = Leptaena rugosa
| type_species_authority = Dalman, 1828
| subdivision_ranks = Species
| subdivision =
{{center|See Species}}
| synonyms = *Kurnamena Roomusoks, 1989
- Leptaenopoma Marek and Havlíček, 1967
- Orhoria Havlicek and Storch, 1990
- Similoleptaena Roomusoks, 1989
- Turgenostrophia
}}
Leptaena is an extinct genus of mid-sized brachiopod that existed from the Dariwilian epoch to the Emsian epoch,{{cite web |last1=Plaza-Torres |first1=Stephanie |last2=Darroch |first2=Simon |last3=Wagner |first3=Peter |title=Family tree of a mass extinction survivor: Phylogenetic analysis of the brachiopod genus Leptaena |url=https://naturalhistory.si.edu/sites/default/files/media/file/2015-plaza-torres-poster.pdf |publisher=Smithsonian |accessdate=31 March 2020}}{{cite journal |last1=Hoel |first1=Ole |title=Palaeobiology of Silurian Leptaeninae (Brachiopoda) from Gotland, Sweden |journal= Paleontology Journal|date=21 January 2014 |volume=2014 |pages=1–14 |doi=10.1155/2014/716053 |doi-access=free }} though some specimens have been found in strata as late in age as the Tournasian epoch.[https://paleobiodb.org/classic/basicTaxonInfo?taxon_no=319542 Paleobiology Database] Like some other Strophomenids, Lepteana were epifaunal, meaning they lived on top of the seafloor, not buried within it, and were suspension feeders.{{cite web |last1=Stigall |first1=Alycia |title=Leptaena |url=http://www.ordovicianatlas.org/atlas/brachiopoda/strophomenata/strophomenida/rafinesquinidae/leptaena/ |website=Atlas of Ordovician Life |date=3 December 2013 |publisher=National Science Foundation |accessdate=26 March 2020}}
Physical description
Leptaena usually have concentric wrinkling and concentric lines on the shell. Leptaena have a concavo-convex profile, and are sometimes Semiquadrate to semielliptical. The Cardinal Process is split in two and the hinge line is straight. Their width is usually greater than their length, like most Strophomenids.
Distribution
Species
Leptaena was a diverse genus, with over 70 recognized species and subgenera. Species in the genus Leptaena include the following.[http://www.catalogueoflife.org/annual-checklist/2019/browse/tree/id/a46215ccac957d327beae93d4a649dea Catalog of Life] Any synonymous genera to which a given species may belong to are labelled with the synonymous genus in parentheses.
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- L. acuta (Kurnamena) (Roomusoks, 2004)
- L. acuticuspidata Amsden, 1958
- L. aequalis Amsden, 1974
- L. alliku (Oraspold, 1956)
- L. altera Rybnikova, 1966
- L. amelia (Havlicek, 1967)
- L. analogaeformis Biernat, 1966
- L. arberae Kelly, 1967
- L. argentina (Thomas, 1905)
- L. bergstroemi Cocks, 2005
- L. borghiana Mergl & Massa, 1992
- L. boyaca Caster, 1939
- L. contermina Cocks, 1968
- L. convexa Weller, 1914
- L. cooperi Easton et al., 1958
- L. crassorugata (Similoleptaena) (Rõõmusoks, 2004)
- L. croma (Havlicek & Storch, 1990)
- L.crypta Opik, 1930
- L. cryptoides (Oraspold, 1956)
- L. dejecta (Baarli, 1995)
- L. delicata Amsden, 1949
- L. depressa (Sowerby, 1825)
- L. diademata (Williams, 1962)
- L. electra (Havlicek, 1967)
- L. ennessbe Spjeldnaes, 1957
- L. enucleata Klenina, 1984
- L. friedrichi (Similoleptaena) (Rõõmusoks, 2004)
- L. gibbosa (James, 1874)
- L. haverfordensis Bancroft, 1949
- L. holcrofti Bassett, 1974
- L. indigena Spjeldnaes, 1957
- L. infrunita (Williams, 1962)
- L. ingrica (Similoleptaena) (Rõõmusoks, 2004)
- L. juvenilis (Öpik, 1930)
- L. kentuckiana Pope, 1982
- L. lappa (Havlicek & Storch, 1990)
- L. lappina (Havlicek & Storch, 1990)
- L. laterorugata (Kurnamena) (Roomusoks, 1989)
- L. lemniscata (Havlicek, 1967)
- L. limbifera (Havlicek, 1967)
- L. martinensis Cocks, 1968
- L. moniquensis Foerste, 1924
- L. nanaformis Zhang et al., 1983
- L. nassichuki Smith, 1980
- L. odeon Havlicek, 1967
- L. oklahomensis Amsden, 1951
- L. ordovicica (Cooper, 1956)
- L. orhor (Havlicek & Storch, 1990)
- L. palmrei (Kurnamena) (Roomusoks, 2004)
- L. parvirugata Hoel, 2005
- L. parvissima Ivanovskii & Kulkov, 1974
- L. paucirugata (Roomusoks 1989)
- L. pertenuis (Similoleptaena) (Rõõmusoks, 2004)
- L. planitia (Similoleptaena) (Rõõmusoks, 2004)
- L. poulseni Kelly, 1967
- L. praequalis Rozman, 1977
- L. provellerosa (Havlicek & Storch, 1990)
- L. purpurea Cocks, 1968
- L. quadrata Bancroft, 1949
- L. quadrilatera (Logan, 1863)
- L. rara (Alekseeva and Erlanger, 1983)
- L. reedi Cocks, 1968
- L. rhomboidalis (Wahlanberg, 1818)
- L. richmondensis Foerste, 1909
- L. roomusoki Cocks, 2005
- L. rugata (Lindström, 1861)
- L. rugaurita (Havlicek, 1967)
- L. rugosa (Dalman, 1828)
- L. rugosides Oraspold, 1956
- L. salopiensis (Williams, 1963)
- L. semiradiata Sowerby, 1842
- L. senecta Roomusoks, 2004
- L. sperion Bassett, 1977
- L. spumiferra (Kurnamea) (Opik, 1930)
- L. strandi (Spjeldnaes, 1957)
- L. tarwanpensis (Similoleptaena) (Rõõmusoks, 2004)
- L. taxilla (Kurnamena) (Oraspold, 1965)
- L. tenuissimestriata McCoy, 1852
- L. tenuistrata Sowerby, 1839
- L. tenuistriata (de Sowerby and Murchison, 1839)
- L. trifidium (Leptaenopoma) (Marek and Havlíček, 1967)
- L. trifidum (Marek and Havlíček, 1967)
- L. undosa (Similoleptaena) (Rõõmusoks, 2004)
- L. valentia (Cocks, 1968)
- L. valida Bancroft, 1949
- L. veldrensis Spjeldnaes, 1957
- L. vellerosa Havlicek, 1967
- L. ventricosa Williams, 1963
- L. zeta Lamont, 1947
- L. ziegleri Cocks, 1968
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References
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Category:Prehistoric brachiopods
Category:Prehistoric brachiopod genera
Category:Ordovician brachiopods
Category:Paleozoic animals of Africa
Category:Paleozoic brachiopods of Asia
Category:Paleozoic animals of Australia
Category:Paleozoic animals of Europe
Category:Paleozoic brachiopods of North America
Category:Paleozoic animals of Oceania
Category:Paleozoic brachiopods of South America
Category:Paleozoic brachiopods of Africa
Category:Paleozoic brachiopods of Europe
Category:Paleozoic brachiopods of Oceania
Category:Fossils of Afghanistan
Category:Paleozoic life of Manitoba
Category:Paleozoic life of New Brunswick
Category:Paleozoic life of Newfoundland and Labrador
Category:Paleozoic life of Nova Scotia
Category:Paleozoic life of the Northwest Territories
Category:Paleozoic life of Nunavut
Category:Paleozoic life of Ontario
Category:Paleozoic life of Quebec
Category:Paleozoic life of Yukon
Category:Fossils of the Czech Republic
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