Barbatia

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Barbatia
Bearded ark mussel (Barbatia barbata)

Bearded ark mussel ( Barbatia barbata )

Systematics
Subclass : Pteriomorphia
Order : Arcida
Superfamily : Arcoidea
Family : Ark clams (Arcidae)
Subfamily : Arcinae
Genre : Barbatia
Scientific name
Barbatia
Gray , 1842

Barbatia is one of Shell - genus of the family of ark shells (Arcidae).

features

The housings, which are usually equally-sided, seldom somewhat unevenly-folded or twisted to the right around the lock axis, are small to medium-sized, elongated-egg-shaped to more or less rounded-rectangular. The right flap is slightly smaller than the left flap in the case of the unevenly hinged case. The cases are only slightly inflated, i. H. are comparatively thin (cross-section through both valves). The dorsal field is narrow. The usually large and wide opening for the byssus extends from the anterior ventral margin to the anterior margin. The broad, rather flat vortex is only slightly shifted towards the front end, i. H. the posterior dorsal margin is slightly longer than the anterior dorsal margin. The rear and front edges are rounded or quite angular. There may be a back extending from the vertebra to the rear edge.

The lock is taxodont, the lock plate is curved. The teeth become larger towards the edge and are increasingly tilted outwards, and can be arranged almost parallel to the edge of the lock. The middle teeth are stunted, in some species the lock only contains a few teeth. The teeth in the front and rear groups can each be angled in the middle. The ligament is elongated and narrow and lies in front of and behind the vertebra.

The ornamentation consists of radial and concentric ribs that create a more or less clear grid pattern. The thick Proostrakum is often drawn out into hair and forms a beard .

Geographical distribution and habitat

The genus occurs in warm tropical and subtropical seas. The mussels live with byssus attached to hard grounds, rocks and corals. They come from the tidal range up to several hundred meters water depth.

Taxonomy

The taxon was established by John Edward Gray in 1842 . The type species is Arca barbata Linné, 1758. The World Register of Marine Species and the Paleobiology Database put the following recent and fossil species in the genus Barbatia ;

The oldest fossil species of the genus Barbata come from the Jura .

supporting documents

literature

  • Rudolf Kilias: Lexicon marine mussels and snails. 2nd edition, 340 p., Verlag Eugen Ulmer, Stuttgart 1997 ISBN 3-8001-7332-8 (p. 44)
  • Raymond Cecil Moore (Ed.): Treatise on invertebrate paleontology. Mollusca, 6, Bivalvia 1. XXXVIII, 489 pp., New York, 1969 (pp. N250 / N252).
  • Amy L. Moran: The unusual prodissoconch and larval development of Barbatia bailyi (Bartsch, 1931) (Mollusca: Bivalvia: Arcidae). The Veliger, 47 (1): 47-52, 2004 online at www.biodiversitylibrary.org
  • 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. 19)

Individual evidence

  1. ^ John Edward Gray: Eastern Zoological Gallery. Synopsis of the Contents of the British Museum, 44: 22-92, London 1842 Online at www.forgottenbooks.com (p. 81)
  2. ^ A b World Register of Marine Species: Barbatia Gray, 1842
  3. ^ A b Paleobiology Database: Barbatia Gray 1842
  4. ↑ a b c d e f g h i j k l m n o p q r s t u v Maxime Glibert, Luc van de Poel: Les Bivalves fossiles du Cénozoïque Étranger des collections de l'Institut Royal des Sciences Naturelles de Belgique. I. Palaeotaxodonta et Eutaxodonta. Institut Royal des Sciences Naturelles de Belgique / Koninklijk Belgisch Instituut voor Natuurwetenschappen, Mémoires / Verhandelingen, 2nd Série / Reeks, 77: Brussels 1965 PDF (73 MB!)
  5. ↑ a b c Enrico Savazzi: Barbatia mytiloides and the evolution of shell torsion in arcid pelecypods. Lethaia, 14: 143-150, Oslo 1981.
  6. ↑ G. Rovereto: Rectifications de nomenclature. Revue critique de paleozoologie, 1899 (3): 90, 1899 Online at www.archive.org (p. 90: pages 81 to 90 are available twice)]

Web links

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