Sphere Astarte
| Sphere Astarte | ||||||||||||
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Sphere Astarte ( Astarte montagui ) |
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| Scientific name | ||||||||||||
| Astarte montagui | ||||||||||||
| Dillwyn , 1817 |
The ball Astarte ( Astarte montagui ) is a shell - type from the family of Astarte (Astartidae) that the order of Carditida is provided.
features
The case is eight to twelve, in exceptional cases up to 22 mm long and roughly three-sided in outline with a semicircular lower edge. The vertebra sits pretty much in the middle of the case. The outside is covered with small, concentric ribs (more numerous and finer than the ribbed Astarte ( Astarte elliptica )). Characteristic is the microscopic structure of the periostracum , which is covered with fine rows of pits arranged in an irregular, radial pattern. The color of the outside varies from light to dark brown. The lock on the right valve has two main teeth, the front tooth of which is relatively wide and the rear tooth is relatively short. The left valve has three main teeth, of which the rear tooth is only very small. The edge of the mantle is integripalliat , i.e. H. Without a jacket bay, the anterior and posterior sphincters are approximately the same size. The siphons are grown together.
Geographical distribution, habitat and way of life
The spherical Astarte ( Astarte montagui ) is a circum- boreal species, it occurs in Europe in the northern Atlantic, in the North Sea to the western Baltic Sea . In the south the distribution area extends to the Bay of Biscay . The species is also found on the west coast of North America.
The animals are inhabitants of sandy, silty soils and live there just below the sediment surface, with parts of the housing still protruding from the sediment. The vortex points upwards, the short siphons leave the housing horizontally at first and then bend vertically upwards. In the North Sea it lives in about 40 to 75 (100) m depth, in the western Baltic Sea in 9 to 31 m depth.
Systematics
The taxon was established in 1817 by Lewis Weston Dillwyn . The species has a number of synonyms : Astarte banksii Leach, 1819, Astarte compressa Jeffreys, 1869, Astarte fabula Reeve, 1855, Astarte globosa Möller, 1842, Astarte pulchella Jonas, 1845, Astarte striata Leach, 1819 and Astarte warhami Hancock, 1846 It was also placed in the genera Tridonta or Nicania .
supporting documents
literature
- Fritz Nordsieck : The European seashells: From the Arctic Ocean to Cape Verde, the Mediterranean Sea and the like. Black Sea. 256 p., Stuttgart, G. Fischer 1969 (p. 70).
- Guido Poppe, Yoshihiro Goto: European Seashells Volume 2 (Scaphopoda, Bivalvia, Cephalopoda) . 221 p., Verlag Christa Hemmen, Wiesbaden 1993 (2000 unc. Reprint), ISBN 3925919104 (p. 90/1)
- Rainer Willmann: Mussels and snails of the North and Baltic Seas. 310 p., Neumann-Neudamm, Melsungen 1989, ISBN 3-7888-0555-2 (p. 112)
On-line
- Marine Bivalve Shells of the British Isles: Astarte montagui (Dillwyn 1817) (site of the National Museum Wales, Department of Natural Sciences, Cardiff)
- Malacolog Version 4.1.0 - A Database of Western Atlantic Marine Mollusca
Individual evidence
- ↑ Lewis Weston Dillwyn: A descriptive catalog of recent shells, arranged according to the Linnæn method: with particular attention to the synonymy; in two volumes . Vol. 1, XII, 580 p., London, John and Arthur Arch, Cornhill, 1817 Online at www.biodiversitylibrary.org (p. 167)
- ↑ MolluscaBase: Astarte borealis (Schumacher, 1817)
