Septifer

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Septifer
Septifer bilocularis

Septifer bilocularis

Systematics
Subclass : Pteriomorphia
Order : Mytilida
Superfamily : Mytiloidea
Family : Blue mussels (Mytilidae)
Subfamily : Septiferinae
Genre : Septifer
Scientific name
Septifer
Récluz , 1848

Septifer is a genus of the mussel family ( Mytilidae ); it is the type genus of the subfamily Septiferinae .

features

The housing has a very tightly rounded front end and a broadly rounded rear end. The dorsal edge is slightly angled, the greatest height is reached well in front of the center of the housing. The ventral edge is slightly curved in a slightly concave manner towards the front end, and is convexly curved towards the rear end, resulting in a weakly S-shaped curved ventral edge. The cases are about 5 cm long and about half as high. The anterior sphincter attachment sits on a protruding septum at the anterior angle below the vertebra , which runs roughly parallel to the longitudinal axis of the housing. The outside has weak to strong radial ribs that can split at the edge of the case. The concentric growth strips are partly strongly developed. The edges of the case are more or less serrated.

Geographical distribution and habitat

The species of the genus are native to the Indo-Pacific. They mostly occur in the tidal range and shallow subtidal up to about 15 meters water depth.

Two species of the genus Septifer were anthropogenically introduced into the Mediterranean, whereby one species is already established in the eastern Mediterranean.

Taxonomy

The taxon was first described by César Auguste Récluz in 1848. The type species by subsequent determination is Mytilus bilocularis Linné, 1758. The Linné type specimen was newly described by Nils Hjalmar Odhner . The following recent species are currently included in the genus. The fossil species are still incomplete.

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. 227)
  • Rudolf Kilias: Lexicon marine mussels and snails. 2nd edition, 340 p., Verlag Eugen Ulmer, Stuttgart 1997 ISBN 3-8001-7332-8 (p. 284)
  • Raymond Cecil Moore (Ed.): Treatise on invertebrate paleontology. Mollusca, 6, Bivalvia 1. XXXVIII, 489 pp., New York, 1969 (pp. N274).

Individual evidence

  1. ↑ Argyro Zenetos, et al .: alien species in the Mediterranean Sea by 2010. A contribution to the application of European Union's Marine Strategy Framework Directive (MSFD). Part I: Spatial distribution. Mediterranean Marine Science, 11 (2): 381-493, 2010.
  2. ^ César Auguste Récluz: Description d'un nouveau genre de coquilles bivalves nommé Septifère (Septifer). Revue Zoologique, 11: 275-279, Paris 1848 Online at www.biodiversitylibrary.org (p. 275)
  3. ↑ Nils Hjalmar Odhner: Results of Dr. E. Mjöbergs Swedish scientific expeditions to Australia 1910-1913. XVII. Mollusca. Kungliga Svenska Vetenskapakademiens Handlingar, 52 (16): 1-115, 1917 Odhner Online at www.biodiversitylibrary.org (p. 18: Septifer bilocularis )
  4. ↑ World Register of Marine Species: Septifer Dunker, 1848 (sic)
  5. ↑ Didier Merle (coord.): Le contenu paléontologique du Lutétien du bassin de Paris. Stratotype Lutétien. 105 p., Muséum national d'Histoire naturelle, Paris & Biotope, Mèze & BRGM, Orléans, 2008 PDF

Web links

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