Bearded mussel
| Bearded mussel | ||||||||||||
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Bearded mussel ( Modiolus barbatus ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Modiolus barbatus | ||||||||||||
| ( Linnaeus , 1758) |
The bearded mussels ( modiolus barbatus ), also beard shell is a shell -Art from the family of mussels (Mytilidae).
features
The same-valve housing is elongated-egg-shaped with a curved or obtuse-angled dorsal edge and an obtuse vertebra. The shape of the housing is very variable. The vertebrae sit near the front end. They are inflected and are comparatively far apart. The housing is up to four to seven centimeters long. The shell is made up of an inner, aragonitic mother-of-pearl layer, a middle, calcitic prismatic layer and the outer organic periostracum .
The ligament is comparatively long. The anterior sphincter is very small and sits far in front on the front edge. The posterior sphincter is very large. The lock is toothless, the lock edge is smooth. The surface line is not fully booked. The periostracum is drawn out hair-like. In older animals, the surface is smooth, apart from rough growth lines. The skin is bluish, purple, reddish to brown in color, the periostracum brown, orange-brown or reddish. The inside is white with a purple-pink tint. The cases are attached to the ground with strong byssus threads .
Similar species
The great blue mussel ( Modiolus modiolus ) is significantly larger than the bearded blue mussel. The bearded mussel differs from the other mussel species by the beard-shaped extended periostracum, which gave the mussel its common German name.
Geographical distribution and way of life
The species occurs on the east coast of the northern and central Atlantic. The distribution area extends from Ireland to the Cape Verde Islands . The species is also found in the Mediterranean .
The species attaches itself to stones or rocks with the linen. It usually sits there well camouflaged between algae or in crevices. It occurs there from the tidal range to greater depths (110 m).
Taxonomy
The taxon was first described by Carl von Linné in 1758 as Mytilus barbatus . It is recognized as a valid species by the World Register of Marine Species.
supporting documents
literature
- 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. 228.
- Rudolf Kilias: Lexicon marine mussels and snails. 2nd edition, Verlag Eugen Ulmer, Stuttgart 1997, ISBN 3-8001-7332-8 , p. 191.
- 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. 31/2.
- Guido Poppe and Yoshihiro Goto: European Seashells Volume 2 (Scaphopoda, Bivalvia, Cephalopoda) . 221 p., Verlag Christa Hemmen, Wiesbaden 1993 (2000 unc. Reprint), ISBN 3925919104 , p. 50.
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. 705 as Mytilus barbatus ).
- ↑ World Register of Marine Species: Modiolus barbatus (Linnaeus, 1758)
