Lima (genus)

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Lima
Lima scabra

Lima scabra

Systematics
Subclass : Pteriomorphia
Order : Limida
Superfamily : Limoidea
Family : File clams (Limidae)
Subfamily : Liminae
Genre : Lima
Scientific name
Lima
Bruguière , 1797

Lima is a shell - genus from the family limidae (Limidae). The oldest representatives of the genus are known from the Triassic .

features

The equally-flattened, only moderately inflated cases are medium to large in size. They are approximately triangular in outline and elongated (obliquely) towards the anterior ventral edge, i.e. more or less clearly unequal. They are significantly higher than they are long. The two "ears" (appendages) on either side of the vertebra are well developed. The front ear is slightly smaller than the back "ear". The vertebrae are far apart, so there is usually a triangular dorsal field in both valves. The ligament lies inside in a flat, triangular pit. The housing can at the front end, and z. T. also gape slightly at the rear end. There may be a byssus slit near the anterior dorsal margin. The lock edge is short and without teeth or with a few, weak, uniform teeth (taxodont) in the rear part of the lock plate.

The surface of the housing has more or less strong radial ribs covered with scales or short spines. The comparatively thick shell consists of an inner and middle aragonitic layer and an outer calcitic layer as well as the organic periostracum . The surface is usually not colored.

There is only one sphincter muscle whose point of attachment to the shell is rather indistinct. Most species have orange-red to red mantle tentacles that cannot be fully retracted into the housing. Some species also have coat eyes.

Geographical distribution and habitat

The genus Lima is common worldwide. The species range from shallow water to the deep sea.

They live attached to hard substrates with byssus threads or build byssus nests. Juvenile specimens live in groups in a Byssusnest, adult specimens inhabit the Byssusnest alone. The species of the Lima genus filter their food ( detritus , bacteria , phytoplankton , nauplius larvae or rotifers ) from the water flow like many other mussel species.

Keeping in aquariums

Some of the Lima species are commercially available for keeping in seawater aquariums.

Taxonomy

The genus Lima was established by Jean-Guillaume Bruguière in 1797. Type species is Lima alba Cuvier, 1797. Lima is the type genus of the subfamily Liminae or the family Limidae Rafinesque, 1815. The World Register of Marine Species assigns the following species to the genus:

The list should certainly be supplemented by other fossil species.

The MolluscaBase lists the following synonyms : Mantellum Röding, 1798, Meotolima Oyama, 1943 and Promantellum Iredale, 1939.

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. 239)
  • Rudolf Kilias: Lexicon marine mussels and snails. 2nd edition, 340 pages, Verlag Eugen Ulmer, Stuttgart 1997 ISBN 3-8001-7332-8 (p. 171)
  • Leslie Reginald Cox , Leo George Hertlein : Family Limidae. In: Raymond Cecil Moore (Ed.): Treatise on invertebrate paleontology. Mollusca, 6, Bivalvia 1. S.N385-N393, New York, 1969.
  • Guido Poppe, Yoshihiro Goto: European Seashells Volume 2 (Scaphopoda, Bivalvia, Cephalopoda) . 221 pp., Verlag Christa Hemmen, Wiesbaden 1993 (2000 unc. Reprint) ISBN 3-925919-10-4 (p. 75)

Individual evidence

  1. ↑ Jean-Guillaume Bruguière: Tableau encyclopédique et méthodique des trois règnes de la nature. Contenant l'helminthologie, ou les vers infusoires, les vers intestins, les vers mollusques, & c. Troisième livraison. Pl. 190–286, Paris, Panckoucke, 1797 Online at www.biodiversitylibrary.org (Pl. 206).
  2. ↑ a b c MolluscaBase: Lima Brugière, 1797

Web links

Commons : Lima  - collection of images, videos and audio files