Crenella
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| Brown , 1827 |
Crenella is a mussel genus of the family of mussels ( Mytilidae ); it is the type genus of the subfamily Crenellinae . The genus has been known since the Eocene.
features
The comparatively small cases are egg-shaped to slightly rhomboid in outline. The vertebra sits at the front end or even protrudes beyond the front end. The surface has clear radial ribbing, which together with the clear growth stripes form a grid-like pattern. The ribs split on the edge of the case, the edge of the case is notched. The lock edge is wide and striated across. The ligament is sunk, the foot thickens. The shell is firm.
Geographical distribution and habitat
The genus Crenella is found worldwide.
The species of the genus live buried in the top layer of fine to silty sandy soils from about 4 m to about 600 m water depth. They are not pinned on with linen threads.
Taxonomy and systematics
The taxon was proposed by Thomas Brown in 1827 . Type species by monotype is Crenella elliptica Brown, 1827, a more recent synonym of Crenella decussata ( Montagu , 1808). According to the World Register of Marine Species , twelve recent species are currently (2015) assigned to the genus Crenella . Some fossil species are added.
- Genus Crenella Brown , 1827
- † Crenella anterodivaricata Eames, 1951 ( Eocene )
- Crenella arenaria Monterosato , 1875
- † Crenella cucullata Deshayes , 1861 ( Lutetium )
- † Crenella cymbiola Vincent, 1930 ( Bartonium )
- Crenella decussata ( Montagu , 1808)
- † Crenella depontaillieri Cossmann & Lambert, 1884 (Oligocene)
- Crenella divaricata ( d'Orbigny , 1853)
- † Crenella elegans Deshayes , 1861 (Lutetium)
- Crenella faba ( OV Müller , 1776)
- Crenella, Gemma Olsson & McGinty, 1958
- † Crenella humilis Vincent, 1930 (Bartonium)
- Crenella magellanica lens, 2002
- Crenella marionensis EA Smith, 1885
- Crenella minuta Thiele & Jaeckel, 1931
- Crenella pectinula ( Gould , 1841)
- Crenella pellucida ( Jeffreys , 1859)
- Crenella pura EA Smith, 1890
- † Crenella scrobiculata von Koenen , 1883 (Lower Oligocene)
- Crenella skomma (McLean & Schwengel, 1944)
- † Crenella striatina Deshayes , 1861 (Lutetium)
- † Crenella striatocostata Nagao, 1928 (Palaeogene)
supporting documents
literature
- Rudolf Kilias: Lexicon marine mussels and snails. 2nd edition, Verlag Eugen Ulmer, Stuttgart 1997 ISBN 3-8001-7332-8 (p. 84)
- Raymond C. Moore : Treatise on Invertebrate Paleontology. Part N: Mollusca. 6, Bivalvia. Vol. 2. The University of Kansas et al., Boulder CO 1969 (S.N274)
- 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. 35)
Individual evidence
- ^ Thomas Brown : Illustrations of the Conchology of Great Britain and Ireland. Drawn from Nature. 65 sh., 52 plates, Lizars, Lizars & Highley, Edinburgh & London, 1827 Online at www.biodiversitylibrary.org (Plate 31) Online at www.biodiversitylibrary.org (explanation of the plate)
- ↑ George Montagu : Supplement to Testacea Britannica. IV, pp. 1–183, plates 17–30, London, White, 1808. Online at www.biodiversitylibrary.org (p. 69, as Mytilus decussatus )
- ^ World Register of Marine Species: Crenella
- ↑ a b c d e f g h i F. E. Eames: A Contribution to the Study of the Eocene in Western Pakistan and Western India B. The Description of the Lamellibranchia from Standard Sections in the Rakhi Nala and Zinda Pir Areas of the Western Punjab and in the Kohat District. Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences, 235 (627): 311-482, 1951, JSTOR 92425 .
