Gigantidas

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Gigantidas
Gigantidas tangaroa

Gigantidas tangaroa

Systematics
Subclass : Pteriomorphia
Order : Mytilida
Superfamily : Mytiloidea
Family : Blue mussels (Mytilidae)
Subfamily : Bathymodiolinae
Genre : Gigantidas
Scientific name
Gigantidas
by Cosel & Marshall , 2003

Gigantidas is a genus of "deep-sea mussels" from the family of mussels ( Mytilidae ). These are very large mussels (up to 30 cm in length) that live in symbiosis with methane bacteria in the gills.

features

The housings of the genus are very large (10 to 32 cm adult size) and very slim (height-length index 0.17 to 0.23). The vertebrae sit approximately 10 to 20% of the total length (from the front end). Juvenile specimens (up to about 5 mm) have too stiff hair or bristles pulled out periostracum . The animals have very long, fleshy gills. The inner folds of the mantle are completely separated from each other. They end in front of the anterior sphincter muscle. The siphons do not have a flap membrane. The foot is very small.

The Prodissoconch I measures 83 to 100 µm, the Prodissoconch II 430 µm.

Geographical distribution and way of life

The species of the genus are so far from New Zealand (recent and fossil) and from the Japanese Ogasawara Islands (1000 km southwest of the main island Honshū ). They live at warm springs that contain methane on the sea floor, or half or completely buried in the sandy or silty sea floor at a depth of up to 1200 m. They live in symbiosis with methane bacteria in the gills. The dimensions of the protoconch indicate a planktotrophic development.

Taxonomy

The taxon Gigantidas was established in 2003 by Rudo von Cosel and Bruce Marshall . It is listed as a valid genus by the World Register of Marine Species.

supporting documents

literature

  • Christina Bienhold, Petra Pop Ristova, Frank Wenzhöfer, Thorsten Dittmar, Antje Boetius: How Deep-Sea Wood Falls Sustain Chemosynthetic Life. PLoS ONE 8 (1): e53590, 2013. doi : 10.1371 / journal.pone.0053590
  • Rudo von Cosel, Bruce Marshall: Two new species of large mussels (Bivalvia: Mytilidae) from active submarine volcanoes and a cold seep off the eastern North Island of New Zealand, with descriptions of a new genus. The Nautilus, 117 (2): 31-46, 2003 Online at www.biodiversitylibrary.org (p. 37)
  • J. Hashimoto, T. Yamane: A new species of Gigantidas (Bivalvia: Mytilidae) from a vent site on the Kaikata Seamount southwest of the Ogasawara (Bonin) Islands, southern Japan. Venus, 64, 1-10, 2005.
  • Kristian P. Saether, Crispin TS Little, Kathleen A. Campbell, Bruce A. Marshall, Mike Collins, Andrea C. Alfaro: New fossil mussels (Bivalvia: Mytilidae) from Miocene hydrocarbon seep deposits, North Island, New Zealand, with general remarks on vent and seep mussels. Zootaxa, 2577: 1-45, 2010. PDF

Individual evidence

  1. ↑ World Register of Marine Species: Genus Gigantidas Cosel & BA Marshall, 2003

Web links