Ribbed Astarte
| Ribbed Astarte | ||||||||||||
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Ribbed Astarte ( Astarte elliptica ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Astarte elliptica | ||||||||||||
| ( Brown , 1827) |
The ribbed Astarte ( Astarte elliptica ), also known as the elliptical Astarte , is a type of mussel from the Astarte family (Astartidae).
features
The housings, which have the same flaps, are round to broadly elliptical in outline with a maximum diameter of three centimeters. The height is 70% of the width. The vertebra lies in front of the center and is often corroded. The rear edge of the case is somewhat blunt, the front edge of the case is rounded. The dorsal edge is slightly concave in front of the vertebra and slightly convex behind the vertebra. The heart-shaped lunula is clearly indented with distinct, somewhat raised edges. The area is lanceolate. The anterior and posterior sphincter impression are almost the same size. The surface line is not booked.
The lock of the right valve has two cardinal teeth, of which the front tooth is very broad and deeply grooved; it almost looks like two teeth. The back tooth of the right valve, on the other hand, is quite narrow. Above the posterior sphincter there is a lateral and distinct pit and flange, and above the anterior sphincter there is a lateral back. The left valve has three cardinal teeth, the back of which is small and indistinct. There is a lateral flange over the posterior sphincter and a lateral pit over the anterior sphincter.
The surface has 20 to 30 very strong, concentric, blunt ribs. Ribs and spaces between the ribs are also covered with fine strips of growth. The height and width of the ribs decrease towards the edge of the housing. The periostracum is yellow-brown, dark brown, red-brown to almost black, the shell itself white. The inside edge is smooth.
Geographical distribution and habitat
The distribution area of the species extends from the Arctic along the eastern Atlantic to the northern coasts of the British Isles. It is also rarely found in the Irish Sea, the Canal, the southern North Sea and the western Baltic Sea. In the western Atlantic, the distribution area extends from Greenland to the New England states. It lives on scree and sandy soils from shallow water (approx. Two meters) to a depth of almost 2,500 meters.
The animals live shallowly buried or only half buried in the sediment. The water temperature must not exceed 17 °.
Taxonomy
The taxon was scientifically described by Thomas Brown in 1827 as Crassina elliptica . The species is now part of the genus Astarte .
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. 70 as Tridonta elliptica )
- Guido Poppe and Yoshihiro Goto: European Seashells Volume 2 (Scaphopoda, Bivalvia, Cephalopoda) . 221 pp., Verlag Christa Hemmen, Wiesbaden 1993 (2000 unc. Reprint), ISBN 3925919104 (p. 90)
- Rainer Willmann: Mussels and snails of the North and Baltic Seas. 310 p., Neumann-Neudamm, Melsungen 1989, ISBN 3-7888-0555-2 (p. 112)
Individual evidence
- ^ Thomas Brown: Illustrations of the Conchology of Great Britain and Ireland. Drawn from Nature. 65 sheets, 52 plates, Lizars, Lizars & Highley, Edinburgh & London, 1827 Online at www.biodiversitylibrary.org (Plate 18, Fig. 3) Online at www.biodiversitylibrary.org (Plate 18, explanation of the plate)
- ↑ World Register of Marine Species: Astarte elliptica (Brown, 1827)
