Ring cone
| Ring cone | ||||||||||||
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Housing of the circumcisus conus |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Conus circumcisus | ||||||||||||
| Born , 1778 |
The annular cone or ring-cone shell ( Conus circumcisus ) is a screw from the family of the cone snails (genus Conus ), which in Indopazifik is distributed and fed fish .
features
Conus circumcisus has a moderately large to large, moderately firm to firm snail shell , which in adult snails reaches 5.5 to 10 cm in length. The perimeter of the body is narrow, cone-like, cylindrical to bulbous, conical, sometimes narrow, conical, the outline almost straight to almost uniformly convex, the quarter towards the apex mostly convex. The case mouth is wider at the base than at the shoulder. The shoulder is angled to rounded. The thread is usually medium high, its outline straight to dome-shaped. The Protoconch has about three and a half whorls and measures a maximum of 0.8 mm. The first 3 to 5 whorls of the teleoconch are covered with tubercles. The seam ramps of the Teleoconch are convex to slightly concave with 2 to 3 to 4 increasing spiral grooves, which mostly disappear in the later passages. The circumference of the body is covered with evenly spaced spirally running ribs, which from the center to the apex are often only weak and sometimes have a fine grain.
The basic color of the case is white and underlaid with various shades of yellow or purple. The area around the body is covered with light brown spiral bands of varying number and width, which usually leave a band in the basic color in the middle towards the base. There are cases with a simple band pattern as well as speckled cases with dark brown spots, spiral rows of alternating white and dark brown dots, spots and lines, sometimes additionally with brown spiral lines. The rows of alternating dark and light markings usually become weaker as the snail grows, as do the dark spots. The base is yellow or yellow-orange, the protoconch white. The seam ramps of the first whorls of the Teleoconch are monochrome white, the later seam ramps are drawn with brown axial markings, which become darker, smaller and often sparser as they grow. The inside of the case mouth is white or pale purple.
The thin, translucent and smooth periostracum is pale yellow, in large adults it is also thicker, almost opaque and slightly velvety. An orange to rust-red color was also observed in live animals.
The top of the foot is white to pink with brown and red spots or speckles, at the rear end paler and without spots. The sole of the foot is pink and blends into white at the back. The rostrum is white proximally and dark yellow distally. The antennae are white with a brown tip, the sipho white to gray with brown spots, sometimes with a dark gray tip in young animals.
distribution and habitat
Conus circumcisus is distributed in the central Indo-Pacific from the Moluccas ( Indonesia ) to the Philippines , Marshall Islands and Solomon Islands as well as to Vanuatu and Australia ( Northern Territory , Western Australia ), probably also on the Society Islands .
It lives in sea depths of 4 m to 200 m on sand, coral rubble, on coral reefs in crevices, on reef pinnacles or under dead coral rocks as well as in shipwrecks.
nutrition
Conus circumcisus eats fish that it harpooned with its poisonous radula teeth .
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] circumcisus Sowb., P. 87.
- Jerry G. Walls: Cone Shells: A Synopsis of the Living Conidae. TFH Publications, Neptune (New Jersey) 1979. p. 326.
- 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
- The Conus Biodiversity Website: Conus circumcisus Born, 1778
- Underwater Kwajalein: Conus circumcisus Born, 1778
Individual evidence
- ↑ Baldomero M. Olivera, Jon Seger, Martin P. Horvath, Alexander E. Fedosov: Prey-Capture Strategies of Fish-Hunting Cone Snails: Behavior, Neurobiology and Evolution. In: Brain, behavior and evolution. Volume 86, number 1, September 2015, pp. 58-74, doi : 10.1159 / 000438449 , PMID 26397110 , PMC 4621268 (free full text) (review).