Anomia (genus)
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Saddle shell ( Anomia ephippium ) |
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| Scientific name | ||||||||||||
| Anomia | ||||||||||||
| Linnaeus , 1758 |
Anomia is a clam genus of the family of anomiidae (Anomiidae) in order Pectinida .
features
The unevenly hinged, flat housings of the species of the genus Anomia are often irregularly round in outline with a diameter of up to 7 centimeters. The housings are almost equilateral, that is, the vertebra sits roughly in the middle (the length of the housing) near the dorsal edge. The dorsal and ventral margins are irregular. Usually the lower right flap is flat, the upper left flap convexly curved. The lower right flap is often deformed by the ground, the deformation can also be traced to the upper left flap. The right flap has an almost completely overgrown, approximately rounded or pear-shaped bay on the dorsal edge through which the byssus passes. The byssus is calcified and fills the byssus hole like a plug. The edge of the case is smooth. The lock has no teeth and is somewhat asymmetrical. The ligament lies internally in a pit under the vertebrae.
Usually the lower right flap is translucent and thin, the upper left flap firm. The ornamentation consists of irregular, weak or somewhat stronger, concentric ribs or lamellas, and / or also of weak radial lines.
The anterior sphincter muscle is reduced in the saddle clams, so on the right (lower) flap there is only one sphincter muscle attachment approximately in the middle, while the left (upper) flap has three muscle attachment points, one for the sphincter and two differently sized marks for the Byssus muscle that splits into two strands in front of the point of attachment.
Geographical distribution and habitat
The types of the genus are distributed worldwide. They come from the boreal and Australian marine regions to the tropics.
They live with byssus attached to the hard substrate from shallow water to greater depths (up to approx. 1400 m).
Taxonomy
The genus Anomia was established by Carl von Linné in 1758 . Type species is Anomia ephippium Linné, 1758 by later definition. According to the World Register of Marine Species and the Paleobiology Database, the following species are included in the genus :
- Genus Anomia Linné, 1758
- Anomia achaeus Gray, 1850
- Anomia chinensis Philippi, 1849
- Anomia cytaeum Gray, 1850
- Saddle shell ( Anomia ephippium Linnaeus, 1758)
- † Anomia hannai Wiedey, 1929 (Oligocene / Miocene)
- † Anomia inornata (Gabb, 1864)
- Anomia macostata M. Huber, 2010
- Anomia peruviana d'Orbigny, 1846
- Anomia simplex d'Orbigny, 1853
- Anomia trigonopsis Hutton, 1877
- † Anomia anomialis (Lamarck, 1819) ( Lutetium )
- † Anomia argentaria Morton, 1833 (Chalk / Paleogene)
- † Anomia boettgeri Martin, 1909 (Pliocene)
- † Anomia colombiana Villamil, 1996 ( Turonium )
- † Anomia cymbula Tate, 1886 (Eocene)
- † Anomia daduensis Iqbal, 1980 (Miocene)
- † Anomia ephippioides Gabb, 1860 (Eocene)
- † Anomia floridana Dall, 1898 (Eocene)
- † Anomia hammetti Harris, 1919 (Eocene)
- † Anomia hinnitoides Cossmann, 1887 ( Lutetium )
- † Anomia inconspicua Clark, 1918 (Miocene?)
- † Anomia inornata Gabb, 1864 (Paleocene)
- † Anomia interrupta Eames, 1951 (Eocene)
- † Anomia kateruensis Hislop, 1859 (Eocene)
- † Anomia lisbonensis Aldrich, 1886 (Eocene)
- † Anomia malinchae Gardner, 1945 (Eocene)
- † Anomia mamillaris Anderson, 1929 (Miocene)
- † Anomia mcgoniglensis Hanna, 1927 (Eocene)
- † Anomia microstriata Dockery, 1982 ( Rupelium )
- † Anomia minuta Villamil, 1996 ( Turonium )
- † Anomia nobilis Reeve, 1859
- † Anomia ornata Gabb, 1876 (chalk)
- † Anomia pakistanica Eames, 1951 (Eocene)
- † Anomia paucistriata Brown, 1905 (Eocene)
- † Anomia planulata Deshayes, 1858 ( Lutetium )
- † Anomia primaeva Deshayes, 1858 (Eocene)
- † Anomia prisca Gemmellaro, 1886 (Perm)
- † Anomia ruffini Conrad, 1843 (Oligocene / Miocene)
- † Anomia rugulosa CossDeshayes, 1858 ( Lutetium )
- † Anomia schafhautli Winkler, 1859
- † Anomia septenaria Olsson, 1928 (Eocene)
- † Anomia sergipensis Maury, 1936 (chalk)
- † Anomia simplex d'Orbigny, 1845 (Miocene / Pliocene)
- † Anomia simplexiformis Brown, 1905 (Eocene)
- † Anomia striata Brocchi, 1814
- † Anomia subcostata Conrad, 1855 (Miocene / Pliocene)
- † Anomia talahabensis Martin, 1922 (Miocene)
- † Anomia trigonopsis Hutton, 1873 (Miocene)
- † Anomia vaquerosensis Loel & Corey, 1932 (Oligocene / Miocene)
- † Anomia verbeeki Martin, 1881 (Miocene)
- † Anomia vulsellata Deshayes, 1858 ( Lutetium )
supporting documents
literature
- Rudolf Kilias: Lexicon marine mussels and snails. 2nd edition, 340 p., Verlag Eugen Ulmer, Stuttgart 1997 ISBN 3-8001-7332-8 (p. 22)
- Raymond Cecil Moore (Ed.): Treatise on invertebrate paleontology. Mollusca, 6, Bivalvia 1. XXXVIII, 489 pp., New York, 1969 (pp. N383).
- Fritz Nordsieck : The European sea shells (Bivalvia). From the Arctic Ocean to Cape Verde, the Mediterranean Sea and the Black Sea. 256 p., Gustav Fischer Verlag, Stuttgart 1969 (p. 61)
- S. Peter Dance, Rudo von Cosel (arrangement of the German edition): The great book of sea shells. 304 p., Verlag Eugen Ulmer, Stuttgart, 1977 ISBN 3-8001-7000-0 (p. 238)
Individual evidence
- ^ Carl von Linné: Systema naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Editio decima, reformata. Pp. 1–824, Holmiae / Stockholm, Salvius, 1758. Online at Göttinger Digitization Center (p. 700).
- ^ World Register of Marine Species: Anomia Linnaeus, 1758
- ^ Paleobiology Database: Anomia Linnaeus, 1758
- ↑ a b c d e Didier Merle (coord.): Le contenu paleontologique du Lutétien du bassin de Paris. Stratotype Lutétien. 105 p., Muséum national d'Histoire naturelle, Paris & Biotope, Mèze & BRGM, Orléans, 2008 PDF
- ↑ a b Tomas Villamil: Paleobiology of two new species of the bivalve Anomia from Colombia and Venezuela and the importance of the genus in recognition of the base of the Turonian. Cretaceous Research, 17: 607-632, 1996 Academia.edu
- ^ A b c d e Julia A. Gardner : Mollusca of the Tertiary formations of Northeastern Mexico. Geological Society of America, Meoir, 11: XI + 332 S., 1945 Google Books
