Ash gray cone snail
| Ash gray cone snail | ||||||||||||
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Housing of Conus cinereus |
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| Scientific name | ||||||||||||
| Conus cinereus | ||||||||||||
| Hwass in Bruguière , 1792 |
The ash gray cone snail ( Conus cinereus , in the dictionary of the German language by Daniel Sanders the “Cschenbrödel” or “Aschenpuster”) is a snail from the cone snail family (genus Conus ), which is widespread in the Indo-Pacific and feeds on fish .
features
Conus cinereus bears a small to medium-sized, moderately light to moderately firm snail shell , which in adult snails reaches 3 to 6 cm in length. The perimeter of the body is narrow, cone-like cylindrical, cone-like cylindrical or bulbous conical, the outline near the apex convex, more straight towards the base. The case mouth is wider at the base than it is next to the shoulder. The shoulder is almost angled or rounded. The thread is low to medium high, its outline deeply concave to straight or slightly S-shaped. The Protoconch has about 2 ¼ whorls and measures a maximum of 0.8 mm. The seam ramps of the Teleoconch are flat to convex with 1 to 3 to 5 increasing spiral grooves, which are usually weaker on the later passages and are sometimes only visible on the first passages. A strong groove below the seam dominates the spiral sculpture. The circumference of the body is covered in one third to one half at the base with axially striped grooves running in a spiral at wide intervals, the grooves at the base being wider and often provided with a spiral thread.
The basic color of the housing is light purple to greenish-gray or shaded from beige to orange or blackish-brown and sometimes covered with dark yellow or olive-colored spiral bands. The circumference of the body has spiral rows of orange to dark brown and pale dots and lines with the basic color, whereby the rows vary greatly in number and are sometimes absent, as well as alternating dark and light markings or light or dark markings throughout. Dark cases have either no spots or additional spirally arranged white or gray spots, while light cases have additional spirally arranged orange to dark brown markings. The whorls of the protoconch are pale to dark brown. The seam ramps of the first whorls of the Teleoconch have no spots and are often similar in color to the Protoconch. The later seam ramps are either without spots or have dark axial markings or, in the case of very dark housings, isolated white spots, whereby the outer edges sometimes have regularly arranged, orange to brown spots. The inside of the case mouth is white, bluish-white or purple behind a translucent outer rim and an adjacent narrow orange to brown zone.
The periostracum is thin, translucent, and smooth.
The upper side of the foot is colored beige in the middle section with black spots and white spots, in front with numerous spots and spots and on the front side with 2 large dark yellow spots. The lateral areas in front of the edge are colored white and behind alternating with black spots. The edges are beige and merge into dark yellow in the rear third. The sole of the foot is white to dark yellow, the rostrum dark brown. The antennae are beige. The sipho is white with brown spots in various shades, only sparsely spotted on the ventral side and without spots on the tip.
distribution and habitat
Conus cinereus is widespread in the Indomalayic seas and in the western Pacific Ocean , including off Indonesia , Papua New Guinea , the Philippines , Japan , the Solomon Islands , New Caledonia and Vanuatu . It lives in water just below the intertidal zone.
Development cycle
Like all cone snails, Conus cinereus is sexually separate and the male mates with the female with his penis . The female lays egg capsules in which there are comparatively few eggs with a diameter of about 521 µm. From this it is concluded that the Veliger stage is probably passed through completely in the capsule and that fully developed creeping snails hatch from the egg capsules. Such a direct development can only be found in a few other cone snail species in the Indo-Pacific, such as the magic cone , but is also known from east Atlantic species such as the Mediterranean cone and the merchant cone .
nutrition
Conus cinereus eats fish that it harpooned with a radula tooth and paralyzed by the highly effective poison mixture from the poison gland .
literature
- George Washington Tryon: Manual of Conchology, structural and systematic, with illustrations of the species , vol. VI; Academy of Natural Sciences, Philadelphia 1884. C [onus] cinereus Hwass., P. 58.
- Dieter Röckel, Werner Korn, Alan J. Kohn: Manual of the Living Conidae Vol. 1: Indo-Pacific Region . Verlag Christa Hemmen, Wiesbaden 1995. The texts on the individual cone snail species of the Indo-Pacific are published on The Conus Biodiversity website with the permission of the authors (see web links).
Web links
Individual evidence
- ^ Heinrich Carl Küster , Heinrich Conrad Weinkauff : Coneae or Conidae, I. Conus Linné. In: Systematic Conchylia Cabinet by Martini and Chemnitz. Volume 4, Section 2. Verlag von Bauer and Raspe (Emil Küster), Nuremberg 1875. pp. 1-403, here p. 34.
- ^ Daniel Sanders : Dictionary of the German language. With documents from Luther to the present. First volume A - K. Otto Wigand, Leipzig 1860, p. 50.
- ^ Alan J. Kohn, in: Thomas F. Duda, Alan J. Kohn, Stephen R. Palumbi (2001): Origins of diverse feeding ecologies within Conus, a genus of venomous marine gastropods. Biological Journal of the Linnean Society 73, pp. 391-409, here p. 409.