Double-furrowed snail

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Double-furrowed snail
Housing of Semicassis bisulcata var. Booleyi

Housing of Semicassis bisulcata var. Booleyi

Systematics
Subordination : Hypsogastropoda
Partial order : Littorinimorpha
Superfamily : Cassoidea
Family : Helmet snails (Cassidae)
Genre : Semicassis
Type : Double-furrowed snail
Scientific name
Semicassis bisulcata
( Schubert & Wagner , 1829)
Case of semi Cassis bisulcata var. Japonica
Housing of Semicassis bisulcata var. Persimilis

The double- furrowed helmet snail ( Semicassis bisulcata ) is a snail from the family of helmet snails (genus Semicassis ), which is widespread in the Red Sea and Indo-Pacific and feeds on sea ​​urchins .

features

The large snail shell of Semicassis bisulcata has a large body circumference and a very small thread, which gives it a hat-like appearance. The whorls have spiral ribs, of which there are 25 to 40 on the body whorl. In contrast to the upper passages with their spiral lines, the body passage is otherwise smooth. The outer lip of the case mouth is bent over and serrated on its inner edge. The surface of the house is white, cream-colored, pink or blue-gray, monochrome or with 4 or 5 spiral bands of brown spots. The snail's body is white, the sole of the foot is dark. In adult snails, the house reaches about 5 cm to 7 cm in length. The pale yellow operculum is fan-shaped.

distribution and habitat

Semicassis bisulcata is distributed in the Indo-Pacific (but not in the Red Sea) from the East African coast to the Marshall Islands , north to central Japan and south to Australia . The snail lives in shallow waters on a sandy bottom.

food

As food by Semi Cassis bisulcata are sea urchins specified, including the spatangoida Maretia planulata .

Systematics

The species was first described by Gotthilf Heinrich Schubert and Johann Andreas Wagner in 1829 as Cassis bisulcata . In 1848, Lovell Augustus Reeve described two further taxa with Cassis pila and Cassis japonica , the latter taxon being subsequently specified by George F. Harris in 1897 as a type of the genus Semicassis established by Otto Andreas Lowson Mørch in 1853 . Both Cassis pila and Cassis japonica are now considered synonymous with Semicassis bisulcata .

Web links

Commons : Double- furrowed helmet snail ( Semicassis bisulcata )  - Collection of images, videos and audio files

Individual evidence

  1. ↑ Japanese bonnet snail Phalium / Semicassis bisulcata. Wild Singapore, 2016.
  2. ^ A b c Terrence Gosliner, David W. Behrens, Gary C. Williams: Coral Reef Animals of the Indo-Pacific: Animal Life from Africa to Hawaii Exclusive of the Vertebrates. Sea Challengers, 1996. p. 128.
  3. ^ GH Schubert & JA Wagner: New systematic Conchylien-Cabinet. Volume 12, Nuremberg, 1829, pp. 68-69, ( digitized version ).
  4. ↑ LA Reeve: Monograph of the genus Cassis. In: Conchologia Iconica, or, Illustrations of the Shells of Molluscous Animals , Volume 5, 1848, ( digitized ).
  5. ^ GF Harris: The Australasian Tertiary Mollusca. In: Catalog of Tertiary Mollusca in the Department of Geology, British Museum (Natural History) , Part 1, 1897, p. 198, ( digitized version ).
  6. ^ AG Beu: Neogene fossil tonnoidean gastropods of Indonesia. In: Scripta Geologica , Volume 130, 2005, pp. 1–186, ( digitized version ).