Leptaena

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Leptaena
Temporal range: Darriwilian–Emsian
Leptaena romboidalis 4.jpg
Leptaena rhomboidalis
Scientific classification e
Kingdom: Animalia
Phylum: Brachiopoda
Class: †Strophomenata
Order: †Strophomenida
Family: †
Subfamily: †
Genus: †Leptaena
Dalman, 1828
Type species

Dalman, 1828
Species
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,[1][2] though some specimens have been found in strata as late in age as the Tournasian epoch.[1][3] Like some other Strophomenids, Lepteana were epifaunal, meaning they lived on top of the seafloor, not buried within it, and were suspension feeders.[4]

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.[4] Their width is usually greater than their length, like most Strophomenids.

Distribution[]

Leptaena fossils have been found on every continent except Antarctica.[3][5][6]

Species[]

Leptaena was a diverse genus, with over 70 recognized species and subgenera. Species in the genus Leptaena include the following.[3][6][7] Any synonymous genera to which a given species may belong to are labelled with the synonymous genus in parentheses.

  • (Roomusoks, 2004)
  • Amsden, 1958
  • Amsden, 1974
  • (Oraspold, 1956)
  • Rybnikova, 1966
  • (Havlicek, 1967)
  • Biernat, 1966
  • Kelly, 1967
  • (Thomas, 1905)
  • Cocks, 2005
  • Mergl & Massa, 1992
  • Caster, 1939
  • Cocks, 1968
  • Weller, 1914
  • Easton et al., 1958
  • (Rõõmusoks, 2004)
  • (Havlicek & Storch, 1990)
  • Opik, 1930
  • (Oraspold, 1956)
  • (Baarli, 1995)
  • Amsden, 1949
  • (Sowerby, 1825)
  • (Williams, 1962)
  • (Havlicek, 1967)
  • Spjeldnaes, 1957
  • Klenina, 1984
  • (Rõõmusoks, 2004)
  • (James, 1874)
  • Bancroft, 1949
  • Bassett, 1974
  • Spjeldnaes, 1957
  • (Williams, 1962)
  • (Rõõmusoks, 2004)
  • (Öpik, 1930)
  • Pope, 1982
  • (Havlicek & Storch, 1990)
  • (Havlicek & Storch, 1990)
  • (Roomusoks, 1989)
  • (Havlicek, 1967)
  • (Havlicek, 1967)
  • Cocks, 1968
  • Foerste, 1924
  • Zhang et al., 1983
  • Smith, 1980
  • Havlicek, 1967
  • Amsden, 1951
  • (Cooper, 1956)
  • (Havlicek & Storch, 1990)
  • (Roomusoks, 2004)
  • Hoel, 2005
  • Ivanovskii & Kulkov, 1974
  • (Roomusoks 1989)
  • (Rõõmusoks, 2004)
  • (Rõõmusoks, 2004)
  • Kelly, 1967
  • Rozman, 1977
  • (Havlicek & Storch, 1990)
  • Cocks, 1968
  • Bancroft, 1949
  • (Logan, 1863)
  • (Alekseeva and Erlanger, 1983)
  • Cocks, 1968
  • (Wahlanberg, 1818)
  • Foerste, 1909
  • Cocks, 2005
  • (Lindström, 1861)
  • (Havlicek, 1967)
  • (Dalman, 1828)
  • Oraspold, 1956
  • (Williams, 1963)
  • Sowerby, 1842
  • Roomusoks, 2004
  • Bassett, 1977
  • (Opik, 1930)
  • (Spjeldnaes, 1957)
  • (Rõõmusoks, 2004)
  • (Oraspold, 1965)
  • McCoy, 1852
  • Sowerby, 1839
  • (de Sowerby and Murchison, 1839)
  • (Marek and Havlíček, 1967)
  • (Marek and Havlíček, 1967)
  • (Rõõmusoks, 2004)
  • (Cocks, 1968)
  • Bancroft, 1949
  • Spjeldnaes, 1957
  • Havlicek, 1967
  • Williams, 1963
  • Lamont, 1947
  • Cocks, 1968

References[]

  1. ^ a b Plaza-Torres, Stephanie; Darroch, Simon; Wagner, Peter. "Family tree of a mass extinction survivor: Phylogenetic analysis of the brachiopod genus Leptaena" (PDF). Smithsonian. Retrieved 31 March 2020.
  2. ^ Hoel, Ole (21 January 2014). "Palaeobiology of Silurian Leptaeninae (Brachiopoda) from Gotland, Sweden". Paleontology Journal. 2014: 1–14. doi:10.1155/2014/716053.
  3. ^ a b c Paleobiology Database
  4. ^ a b Stigall, Alycia (3 December 2013). "Leptaena". Atlas of Ordovician Life. National Science Foundation. Retrieved 26 March 2020.
  5. ^ Global Biodiversity Information Facility
  6. ^ a b Fossilworks
  7. ^ Catalog of Life


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