Lasaea adansoni

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Lasaea adansoni
Lasaea adansoni (from GB Sowerby II 1859: Plate 6, Fig. 7,8 [1])

Lasaea adansoni (from GB Sowerby II 1859: plate 6, fig. 7,8)

Systematics
Superordinate : Imparidentia
Order :
Superfamily : Galeommatoidea
Family : Lasaeidae
Genre : Lasaea
Type : Lasaea adansoni
Scientific name
Lasaea adansoni
( Gmelin , 1791)

Lasaea adansoni is a species of mussel from the Lasaeidae family that lives in the sea .

features

The equally-flattened, moderately distended cases are small (up to about 3 mm) and ovoid-elongated. They are unequal, the vertebrae sit behind the midline. The anterior dorsal margin slopes down flat and the anterior end is rounded to slightly truncated. The posterior dorsal margin drops off steeply; the rear end is broadly rounded. The ventral margin is well rounded. The ligament lies internally on a large, crooked resilifer behind the vertebrae. The right valve has a posterior and an anterior posterior tooth, the left valve has only one lateral tooth. There is also a small, narrow main tooth in the left valve that engages in a pit in the right valve. The surface line is only indistinct, as are the muscle impressions. The inner edge of the case is smooth.

The shell is thin and fragile. The ornamentation consists of growth strips parallel to the edge; coarser ridges mark growth interruptions. The yellowish periostracum is obsolete. Juvenile shells are white, as they grow they turn reddish with age:

Geographical distribution, habitat and way of life

The distribution area of ​​the species extends from the North Atlantic to the Mediterranean. It is also proven from Madeira , the Azores and the Canary Islands . It is also found in the Pacific; in the eastern Pacific from Alaska to Peru, in the western Pacific to Japan.

The animals live mainly in the tidal area on rocky coasts, in crevices, under dead shells and on marine plants ( Lichina pygmaea , Fucus ), each attached with linen. Fritz Nordsieck gives the depth distribution at 5 to 1360 m.

Taxonomy

The species was set up in 1791 by Johann Friedrich Gmelin in the original combination Tellina adansoni . He referred to an illustration (plate 17, Fig. 9) in the work Histoire naturelle du Sénégal by Michel Adanson , which appeared in Paris in 1757. Lasaea adansoni is the type species of the genus Lasaea Bronn, 1827. The genus Lasaea is in turn the type genus of the family Lasaeidae.

supporting documents

literature

  • Paul Chambers: Channel Island Marine Molluscs: An Illustrated Guide to the Seashells of Jersey, Guernsey, Alderney, Sark and Herm. 321 S., Charonia Media, 2008, ISBN 978-0-9560655-0-6 Preview on Google Books (p. 230)
  • Eugene V. Coan, Paul Valentich Scott, Frank R. Bernard: Bivalve Seashells of Western North America. Marine Bivalve Mollusks from Arctic Alaska to Baja California. Santa Barbara Museum of Natural History, Santa Barbara, CA 2012 ISBN 0-936494-30-1 , p. 317.
  • 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. 87)
  • 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. 85/86)

On-line

Individual evidence

  1. ↑ George Brettingham Sowerby II : Illustrated index of British shells. containing figures of all the recent species, with names and other information. XV S., XXIV plate London, Simpkin, Marshall & Co., 1859 Online at www.biodiversitylibrary.org (plate 6)
  2. ^ Johann Friedrich Gmelin Gmelin: Caroli a Linné, systema naturae. Tom. I. Pars VI. Pp. 3021-3910. Beer, Lipsiae / Leipzig, 1791. Online at www.biodiversitylibrary.org (p. 3239)
  3. ↑ Michel Adanson: Histoire naturelle du Sénégal: coquillages: avec la relation abrégée d'un voyage fait en ce pays, pendant les années 1749, 50, 51, 52 & 53; ouvrage orné de figures. 275 p., 19 plates, Claude-Jean-Baptiste Bauche, Paris, 1757 Online at www.biodiversitylibrary.org (plate 17, Fig. 9)
  4. ↑ MolluscaBase: Lasaea adansoni (Gmelin, 1791)

Web links

Commons : Lasaea adansoni  - collection of images, videos and audio files