Small lentil shell
| Small lentil shell | ||||||||||||
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Lentil shell ( Kurtiella bidentata ) |
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| Scientific name | ||||||||||||
| Kurtiella bidentata | ||||||||||||
| ( Montagu , 1803) |
The lentil mussel ( Kurtiella bidentata ), also called bidentate lentil mussel , is a type of mussel from the family of lentil mussels (Montacutidae). It is widespread in the eastern North Atlantic and into the Mediterranean .
features
The housing , which has the same flap , is up to 6 mm long, but it is usually much smaller. It is unequal, the vertebra is well behind the midline. The thickness varies, some specimens are noticeably bloated. The housing is approximately egg-shaped in outline. The anterior dorsal margin is almost straight and slopes moderately. The front edge is broadly rounded, the ventral edge moderately curved. The posterior dorsal margin is short and depressed. The rear edge appears somewhat truncated and is much more rounded than the front edge. The long lunula is flat and narrow.
The surface is carved only with fine concentric growth strips and irregular growth interruptions. The inner edge is smooth. The ligament lies internally under the vertebrae. The right valve has a strong lateral lateral tooth along the ligament. The left flap also has a lateral tooth. The surface line is entire.
The whitish skin is thin and looks fragile. The periostracum is also thin, pale, and often covered with iron or manganese deposits. The Prodissoconch measures 400–580 µm. The Prodissoconch I is smooth, the Prodissoconch II shows weak growth lines parallel to the edge.
Geographical distribution, habitat and way of life
The distribution area of the species extends in the eastern North Atlantic from northern Norway along the European coast to southern Spain and Morocco as well as into the Mediterranean. So far there is no reliable evidence of West Africa (south of Morocco) or the Atlantic islands.
The animals occur from the intertidal to about 100 meters water depth. In the Intertidal they live in mud-filled crevices, in the somewhat deeper areas in mud or muddy sand. They are often the brittle star Acrocnida brachiata or Amphiura associated species, or in the buildings by spraying worm TYPES the genus Golfingia and in the tubes of Nereis - and Barnea found species.
The life cycle lasts about three to rarely four years. The eggs are retained in the mantle cavity and fertilized there. There they develop into planktotrophic Veliger larvae with a shell size or length of 150 µm, which are then released into the open water. After several weeks as pediatricians, you move on to soil life and metamorphosis . In the second year most animals produce sperm, only a few also produce eggs. In other populations in this age group there are almost exclusively males, only a few are simultaneous hermaphrodites. In the third year, the oocytes of all animals also mature. The animals are now functional males and females. The sperm are transferred in the form of sperm packets and stored in special collection bags (Receptacula seminis) in the coat of the female. The eggs do not have to be created at the same time as the sperm. A few animals still have a fourth year.
Taxonomy
The taxon was first described in 1803 by George Montagu as Mya bidentata . It has often been placed in the genus Mysella Angas, 1877. It is the type species of the genus Kurtiella Gofas & Salas, 2008.
supporting documents
literature
- 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. 92 as Mysella bidentata )
- Guido Poppe. Yoshihiro Goto: European Seashells Volume 2 (Scaphopoda, Bivalvia, Cephalopoda) . 221 p., Verlag Christa Hemmen, Wiesbaden 1993 (2000 unc. Reprint), ISBN 3925919104 (p. 87 as Mysella bidentata )
- Rainer Willmann: Mussels and snails of the North and Baltic Seas. 310 p., Neumann-Neudamm, Melsungen 1989, ISBN 3-7888-0555-2 (p. 118 as Montacuta bidentata )
On-line
Individual evidence
- ↑ Marie V. Lebour: Notes on the breeding of some lamellibranchs from Plymouth and Their larvae. Journal of the marine biological Association of the United Kingdom, 23: 119-144, Plymouth 1938 PDF (p. 144)
- ↑ The reproduction and development of some members of the Erycinidae and Montacutidae (Mollusca, Eulanellibranchiata). Proceedings of the Malacological Society of London, 36: 79-120, London 1964
- ↑ D. O'Foighil, D. McGrath, ME Conneely, BF Keegan, M. Costelloe: Mysella bidentata is a euryvalent species. Its distribution in the N. Øresund 3-4 months after settling is positively correlated with Population dynamics and reproduction of Mysella bidentata (Bivalvia: Galeommatacea) in Galway Bay, Irish west coast. Marine Biology, 81: 283-291, 1984 doi: 10.1007 / BF00393222
- ↑ Kurt W. Ockelmanna & Kirsten Muusa: The biology, ecology and behavior of the Bivalve Mysella bidentata (Montagu). Ophelia, 17 (1): 1-93, 1978 doi : 10.1080 / 00785326.1978.10425474
- ↑ Georg Montagu: Testacea Britannica, or natural history of British shells, marine, land, and fresh-water, including the most minute: systematically arranged and embellished with figures. P. I-XXXVII, 1-606, London, White 1803. Online at www.biodiversitylibrary.org (P. 44)
- ↑ World Register of Marine Species: Kurtiella bidentata (Montagu, 1803)
