House slippers

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House slippers
Naturalis Biodiversity Center - RMNH.MOL.319610 - Crassostrea bilineata (Röding, 1798) - Ostreidae - Mollusc shell.jpeg

House slipper ( Magallana bilineata )

Systematics
Subclass : Pteriomorphia
Order : Ostreida
Superfamily : Ostreoidea
Family : Oysters (Ostreidae)
Genre : Magallana
Type : House slippers
Scientific name
Magallana bilineata
Röding , 1798

The Hausschuhauster ( Magallana bilineata , Syn .: Crassostrea bilineata ) is a type of mussel from the oyster family (Ostreidae). It is of little economic importance.

features

The unequal-sided housing of the Hausschuhauster is egg-shaped and is up to 10 centimeters long. The shape is very variable. There is no depression in the vertebral area. The case is also highly asymmetrical, with the vertebrae sitting near the front end. The left flap is slightly larger than the right flap and is concave. The right flap is only slightly arched with a lock that does not protrude, and functions as a cover. The egg-shaped, large sphincter impressions are located in the rear central area and are lightly pigmented black or brown. They are slightly recessed in the front area and take up about a tenth of the inner surface of a valve. The Quenstedt muscle is egg-shaped and is very small, only about one-twentieth the area of ​​the sphincter. The skin is whitish to gray-brown. The inner surface is glossy white.

In the soft body, the two jacket lobes in the area of ​​the lock are fused together over about a third of the length. The edge of the coat is thick and beige in color. The gills are elongated, triangular and take up about half of the mantle cavity.

Similar species

In molecular biology, Magallana bilineata is closely related to Magallana dianbaiensis (J.-J. Xia, X.-Y. Wu, S. Xiao & Z. Yu, 2014).

Geographical distribution, habitat and way of life

The distribution area extends over the western Pacific from China to the Philippines , northern Australia to the Indian Ocean (Malaysia, Thailand to Yemen).

Reproduction

The animals are protandric hermaphrodites. The sex products are released into the open water, where fertilization takes place. The eggs are about 70 µm in diameter. The D-shaped Prodissoconch I was fully developed after just 24 hours. It measures 70 ± 2 µm in length and 61 ± 3 µm in height. The left and right flaps are still roughly the same. The umbo stage was reached after seven days; Housing length 100 ± 7 µm, height 110 ± 10 µm. The late umbo stage was reached around day 12, housing length 136 ± 13 µm, housing height 162 ± 20 µm. The pediveliger stage with transition to soil life was reached after 19 days. The housing length was 278 ± 35 µm, the housing height 320 ± 38 µm.

Taxonomy

The taxon was set up in 1798 by Peter Friedrich Röding as Ostrea bilineata . The taxon was placed in the genus Crassostrea for a long time . In 2016, Salvi and Mariotti found clear molecular biological differences to the genus Crassostrea sensu strictu (ie species around the type species Crassostrea virginica ) and therefore proposed the new genus Magallana Salvi & Mariotti, 2016, with Ostrea gigas Thunberg, 1793 as the type species.

Vanessa Simão do Amaral and Luiz Ricardo L. Simone as well as MolluscaBase list the following synonyms: Ostrea orientalis Dillwyn, 1817, Ostrea radiata Bory de Saint-Vincent, 1827, Gryphaea angulata Adams, 1858, Ostrea lugubris Sowerby, 1871, Ostrea lischkei Löbbecke, 1882 , Ostrea madrasensis Preston, 1916, Ostrea pennigera Jousseaume in Lamy, 1925, Ostrea (Saxostrea) iredalei Faustino, 1932, Ostrea benfica Bartsch, 1945.

supporting documents

literature

  • Vanessa Simão do Amaral: Revisão taxonômica da subfamília Crassostreinae (Bivalvia: Ostreidae). Inaugural dissertation, Universidade de São Paulo Instituto de Biociências da USP, 248 p. With attachments, São Paulo 2014 PDF

Individual evidence

  1. ↑ a b FAO: Species Fact Sheets: Crassostrea iredalei (Faustino, 1932)
  2. ↑ Living Australia: Crassostrea bilineata (Röding, 1798) - Slipper-shaped Oyster
  3. ↑ Somchai Bussaravit, Tomas Cedhagen: Larvae of commercial and other oyster species in Thailand (Andaman Sea and Gulf of Thailand). Steenstrupia, 32 (2): 95–162, 2012. PDF (Academia.edu)
  4. ^ Peter Friedrich Röder: Museum Boltenianum, sive, Catalogus cimeliorum e tribus regnis naturae quae olim collegerat Joa. Fried. Bolten. Pars Secunda continens Conchylia sive Testacea univalvia, bivalvia & multivalvia. Johann Christian Trapius, Hamburg 1798 Online at Biodiversity Heritage Library , p. 170.
  5. ↑ Vanessa Simão do Amaral, Luiz Ricardo L. Simone: Revision of genus Crassostrea (Bivalvia: Ostreidae) of Brazil. Journal of the Marine Biological Association of the United Kingdom , 94 (4): 811-836, 2014 doi : 10.1017 / S0025315414000058
  6. ↑ MolluscaBase: Magallana bilineata (Röding, 1798)

Web links

Commons : Hausschuhauster ( Crassostrea bilineata )  - Collection of images, videos and audio files