Septifer cumingii

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Septifer cumingii
Systematics
Order : Mytiloida
Superfamily : Mytiloidea
Family : Blue mussels (Mytilidae)
Subfamily : Septiferinae
Genre : Septifer
Type : Septifer cumingii
Scientific name
Septifer cumingii
( Récluz , 1848)

Septifer cumingii is a shell - type from the family of mussels (Mytilidae). In 2001 the species was first found near Yumurtalik in southern Turkey in the eastern Mediterranean. The first appearance of the species so far away from the Suez Canal is more likely to be traced back to a displacement than a Lessepsian immigration .

features

The equally flared, rather flared housing is up to 15 mm long. Récluz gives a ratio of length to height to thickness of 13: 8: 7 mm. So it is very tall and very bloated in relation to its length. It is triangular in outline and strongly unequal, the vertebrae are very close to the front end. Below the vertebra (in each valve) a small septum is developed in the direction of the mirror axis of the housing. The front end is tightly rounded, the rear end very rounded. The dorsal edge rises steeply to the highest point approximately in the middle of the housing. The ventral margin is slightly concave. The ligament lies externally in a longitudinal pit. The lock has four to six dysodontic teeth dorsal to the ligament, and towards the ventral side there are two to three comparatively large teeth. The small anterior sphincter rests on the septum, while the posterior, more than twice as large, posterior sphincter sits below the dorsal margin, well away from the posterior margin.

The shell is firm. The ornamentation consists of numerous strong radial ribs that occasionally branch out. They are crossed by finer concentric lines that give the ribs a knotty look. The inner edge of the case is notched. The periostracum is drawn out into simple, long and fine bristles that lie against the surface. The outside is light green with orange to pink spots. The inside is tinted light green and pink.

Similar Art

Septifer cumingii can easily be distinguished from Brachidontes pharaonis by the septum in the umbonal area. The Indo-Pacific species Septifer bilocularis becomes significantly larger with 50 mm in length and is typically red, blue or green in color.

Geographical distribution, habitat and way of life

The species detected in the Suez Canal in 1939 (as Septifer bilocularis var. Forskali ). In 2001 it was found near Yumurtalik in southern Turkey. In 2006 it was also found on the coast of Iskenderun at a depth of five to seven meters. However, there were only a few copies. By 2010 the species had reached the island of Astypalea (Greece). In 2014, the species was also detected in Israel .

The animals live with byssus threads attached to hard substrate, stones, coral and shell fragments in the shallow water of rocky coasts to a depth of about 40 meters.

Taxonomy

The taxon was founded by César Auguste Récluz. It was in the Red Sea and the Mediterranean as Septifer bilocularis var. Forskalii or forskalii Septifer Dunker identified 1855th The type locality of Septifer cumingii Récluz, 1848 is the island of Anaa in the Tuamotu Archipelago ( French Polynesia ). Future molecular biological investigations must show whether the synonymization of Septifer forskalii Dunker, 1855 with Septifer cumingii was right. The type locality of Septifer forskalii Dunker, 1855 is the Red Sea, the type locality of Septifer bilocularis (Linnaeus, 1758) is the O. Indico ( Indian Ocean ).

The original spelling of Septifer forskalii is with double i. The misspelling forskali is often found (e.g. in Zenetos et al. 2003 and Oliver 1992)

literature

  • Peter Graham Oliver, Kevin Thomas (pictures): Bivalved seashells of the Red Sea. 330 pp., Wiesbaden, Hemmen et al. a., 1992 ISBN 3-925919-08-2 (p. 48 as Septifer bilocularis var. forskali )
  • Argyro Zenetos, Serge Gofas, Giovanni Russo, José Templado: CIESM Atlas of Exotic Species in the Mediterranean. Vol.3 Mollusca. CIESM (Frédéric Briand, ed.), Monaco, 2003 ISBN 92-990003-3-6 (p. 232/233, as Septifer forskali (sic) text online )

Individual evidence

  1. ^ A b c S. Albayrak, D. Çeviker Two extra-Mediterranean mollusks from southeast Turkey: Siphonaria belcheri Hanley, 1858 [Gastropoda: Siphonariidae] and Septifer bilocularis (Linnaeus, 1758) (Bivalvia: Veneridae). Israel Journal of Zoology, 47: 297-298, 2001.
  2. ↑ Marine Biota of the Israel-Mediterranean (BIM): Septifer forskalii (picture!)
  3. ^ César Auguste Récluz: Description d'un nouveau genre de coquilles bivalves nommé Septifère (Septifer). Revue et Magasin Zoologique Pre et Appliquée, 2. série, 1: Paris 1849. Online at www.biodiversitylibrary.org (p. 132)
  4. ^ A b Serhat Albayrak, Senem Çağlar: On the presence of Siphonaria belcheri Hanley, 1858 [Gastropoda: Siphonariidae] and Septifer bilocularis (Linnaeus, 1758) [Bivalvia: Mytilidae] in the Iskenderun Bay (SE Turkey). Aquatic Invasions, 1 (4): 292–294, 2006 PDF (ResearchGate)
  5. ↑ Argyro Zenetos, S. Katsanevakis, D. Poursanidis, F. Crocetta, D. Damalas, G. Apostolopoulos, C. Grravili, E. Vardala-Theodorou, M. Malaquias: Marine alien species in Greek Seas: Additions and amendments by 2010 . Mediterranean Marine Science, 12 (1) :, 95-120, 2011 PDF
  6. ↑ Henk K. Mienis: Monitoring the invasion of the Eastern Mediterranean by Lessepsian and other Indo-Pacific molluscs (continuation). Haasiana, 7: pp. 33–34, 2014 PDF (pp. 33/34)
  7. ^ César Auguste Récluz: Description d'un nouveau genre de coquilles bivalves nommé Septifère (Septifer). Revue Zoologique, 1848, 275-279, Paris 1848. Online at www.biodiversitylibrary.org
  8. ^ Markus Huber: Compendium of Bivalves. 901 S., Hackenheim, ConchBooks, 2010 ISBN 978-3-939767-28-2 (p. 548)
  9. ↑ William Dunker: De genere septiferis mytilaceorum et de dreisseniis. 26 p., Bayrhofferi, Marburg, 1855 Online Bayerische Staatsbibliothek digital p. 9.
  10. ^ Carl von Linné: Systema naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus II. Editio decima, reformata. Pp. 1-824, Holmia / Stockholm, Salvius, 1758. Online at www.biodiversitylibrary.org (p. 705).
  11. ↑ MolluscaBase: Septifer cumingii Récluz, 1848