Lentil shells

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Lentil shells
Tellimya ferruginosa

Tellimya ferruginosa

Systematics
Subclass : Heterodonta
Euheterodonta
Superordinate : Imparidentia
Order :
Superfamily : Galeommatoidea
Family : Lentil shells
Scientific name
Montacutidae
W. Clark , 1855

The lens shells (Montacutidae) are a shell - family from the superiority of the Imparidentia . Most of the species are commensals from other marine life. A parasitic species is even known, another species grows bacteria on their gills. At present (2016) around 175 recent species are known, but there are several unsafe or dubious species among them. The number of fossil species is unclear as there is no modern editing of the family. The oldest species come from the Eocene .

features

The housings, which have the same flaps, are usually small to very small (a few millimeters to a few centimeters long). They are usually egg-shaped, rounded triangular or rounded rhomboidal in outline. They are unequal, the vertebrae sit a little in front of or behind the middle. The ligament is located internally in a pit below and / or behind the vertebrae. The lock has only a few teeth, usually only a single cardinal or lateral tooth. In the left flap there is usually only a single anterior lateral tooth. The surface line is entire and not indented. There are two more or less equally large sphincter impressions in each of the two valves. The surface is usually little sculpted, often only concentric growth strips are formed. The shell is usually thin.

Geographical distribution, habitat and way of life

The types of lentil mussels are common worldwide. They occur from the tidal range to the deep sea .

Most species are commensals with echinoderms (Echinodermata), syringe worms (Sipunculida), arthropods (Arthropoda) or arm pods (Brachiopoda) and sea ​​anemones (Actiniaria). There is even a known parasitic species, other species breed bacteria on their gills.

The representatives of the Montacutidae are mostly protandric , protogyne or permanent hermaphrodites . Other species are separate sexes. In some species (e.g. Montacuta percompressa ) the (dwarf) males are more or less parasites in the females. They are enclosed by the mantle of the female, reduced to egg-shaped gonadal tissue, and no longer have a housing. Self-fertilization has already been demonstrated in one species ( Montacutona compacta (Gould, 1861))

Taxonomy

The taxon was established by William Clark in 1855. However, the validity of the taxon is controversial. While Bouchet & Rocroi and Carter et al. treat the family as a synonym of the Lasaeidae Gray family, 1842, consider Gosselck et al. and the MolluscaBase the family as a valid taxon.

supporting documents

literature

  • Philippe Bouchet, Jean-Pierre Rocroi, Rüdiger Bieler, Joseph G. Carter, Eugene V. Coan: Nomenclator of Bivalve Families with a Classification of Bivalve Families. Malacologia, 52 (2): 1-184, 2010 doi : 10.4002 / 040.052.0201
  • Rüdiger Bieler & Paula M. Mikkelsen: Bivalvia - a look at the branches . Zoological Journal of the Linnean Society, 148: 223-235, London 2006.
  • Rüdiger Bieler, Paula M. Mikkelsen, Timothy M. Collins, Emily A. Glover, Vanessa L. González, Daniel L. Graf, Elizabeth M. Harper, John Healy, Gisele Y. Kawauchi, Prashant P. Sharma, Sid Staubach, Ellen E. Strong, John D. Taylor, Ilya Tëmkin, John D. Zardus, Stephanie Clark, Alejandra Guzmán, Erin McIntyre, Paul Sharp, Gonzalo Giribet: Investigating the Bivalve Tree of Life - an exemplar-based approach combining molecular and novel morphological characters . Invertebrate Systematics, 28: 32–115, 2014 doi : 10.1071 / IS13010
  • Joseph G. Carter, Cristian R. Altaba, Laurie C. Anderson, Rafael Araujo, Alexander S. Biakov, Arthur E. Bogan, David C. Campbell, Matthew Campbell, Chen Jin-hua, John CW Cope, Graciela Delvene, Henk H Dijkstra, Fang Zong-jie, Ronald N. Gardner, Vera A. Gavrilova, Irina A. Goncharova, Peter J. Harries, Joseph H. Hartman, Michael Hautmann, Walter R. Hoeh, Jorgen Hylleberg, Jiang Bao-yu, Paul Johnston, Lisa Kirkendale, Karl Kleemann, Jens Koppka, Jiří Kříž, Deusana Machado, Nikolaus Malchus, Ana Márquez-Aliaga, Jean-Pierre Masse, Christopher A. McRoberts, Peter U. Middelfart, Simon Mitchell, Lidiya A. Nevesskaja, Sacit Özer , John Pojeta, Jr., Inga V. Polubotko, Jose Maria Pons, Sergey Popov, Teresa Sánchez, André F. Sartori, Robert W. Scott, Irina I. Sey, Javier H. Signorelli, Vladimir V. Silantiev, Peter W. Skelton, Thomas Steuber, J. Bruce Waterhouse, G. Lynn Wingard, Thomas Yancey: A Synoptical Classification of the Bivalvia (Mollusca). Kansas University Paleontological Contributions, 4: 1-47, Lawrence, Kansas, USA 2011, ISSN  1946-0279 PDF
  • Fritz Gosselck, Alexander Darr, Jürgen HJ Jungbluth, Michael Zettler: common names for mollusks of the sea and brackish water in Germany. Mollusca, 27 (1): 3-32, 2009 PDF

Individual evidence

  1. ↑ a b MolluscaBase: Montacutidae W. Clark, 1855
  2. ↑ Fritz Kautsky: The Erycinen of the Lower Austrian Miocaen. Annals of the Natural History Museum in Vienna, 50: 584-671, Vienna 1939.
  3. ^ André Chavan: Montacuta Turton, 1822. In: Raymond Cecil Moore (Ed.): Treatise on invertebrate paleontology. Part N. Mollusca, 6, Bivalvia 2. pp. N490-N951, New York, 1969 (pp. N527).

Web links

Commons : Montacutidae  - Collection of images, videos and audio files