Conus balteatus
| Conus balteatus | ||||||||||||
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Housing of Conus balteatus |
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| Scientific name | ||||||||||||
| Conus balteatus | ||||||||||||
| GB Sowerby I , 1833 |
Conus balteatus is the species name of a screw from the family of the cone snails (genus Conus ), which in Indopazifik is used and from Vielborstern fed.
features
Conus balteatus bears a small to medium-sized, moderately light to moderately firm snail shell , which in adult snails reaches 2.5 to 5 cm in length. The circumference of the body is conical, bulbous conical to broadly conical or pear-shaped, the outline towards the apex is slightly to clearly convex and otherwise almost or completely straight, sometimes slightly convex near the base. The shoulder is usually angled and heavily to weakly covered with tubercles. The thread is low to medium high, its outline straight to concave. The protoconch has about one-third to two whorls and measures a maximum of 0.7 mm. The first whorls of the teleoconch are covered with tubercles, sometimes only very weakly. The seam ramps of the Teleoconch are flat and with 1 to 2 to 4 to 7 increasing spiral grooves. The entire circumference of the body is covered with tightly spiraling ribs, even if only weak in some populations.
The basic color of the case is white, sometimes bluish-purple. A colored band with various shades from brown to brownish-red or olive-colored runs around the perimeter of the body on both sides of the middle. There are specimens with separate colored bands and with bands in the basic color in the middle, on the shoulder and at the base, as well as those in which only the tubercles on the shoulder are partially in the basic color. Dark areas around the body are often speckled with white dots or lines arranged in spiral rows, either isolated or in regular sequences. The circumferences of the protoconch and a few first seam ramps of the teleoconch are reddish purple, the later seam ramps, however, often monochrome in the basic color, sometimes spotted with markings that correspond in color to the spiral bands on the circumference of the body. The case mouth is translucent in small cases, purple to brown in larger cases.
The periostracum in snails from Japan is thin, translucent, smooth and yellow-olive in color, in snails from Somalia it is thicker, opaque and darker olive-colored.
The foot is dull red, with black spots on the sides and sparsely white spots on the sole of the foot. In the Indian Ocean , the rostrum is uniformly reddish-brown or dark brown with a pink tip. In individuals from Okinawa , the rostrum is pink with white dots and dark brownish-red horizontal stripes at the tip. The antennae are pale gray with white dots and short, dark reddish-brown strokes. In the Indian Ocean, the sipho is either dark brown with a pink tip or pink, dorsally with dense black spots on the back. In Okinawa, the sipho is pink in front and pale gray in the back, with the whole sipho having white dots and the pink part also having dark brownish-red horizontal stripes.
The radula teeth of Conus balteatus, which are connected to a poison gland, resemble those of Conus varius ; like these they have a barb at the tip and a second barb or blade on the opposite side. They have a saw that ends in a point. The shaft has a waist and a small spur sits at the base.
distribution and habitat
Conus balteatus is distributed in the Indo-Pacific , in the Indian Ocean from the coast of East Africa ( Mozambique to North Somalia ) via the Mascarene Mountains , Maldives to Indonesia , in the Pacific Ocean to Japan , Western Australia , Queensland , Fiji and Samoa .
Conus balteatus lives in the intertidal zone and a little below on coral reefs on rough limestone, dead coral rocks, rubble and mixtures of rubble and sand, often hidden under coral rocks. The form cernicus occurs in the Mascarene Mountains and Somalia at sea depths of 20 to 30 m.
Development cycle
Like all cone snails, Conus balteatus is sexually separate and the male mates with the female with his penis . The eggs in the egg shells in the eastern Indian Ocean have a diameter of around 310 µm, from which it is concluded that the Veliger larvae swim freely for at least 14 days before they sink down and metamorphose into crawling snails .
nutrition
The prey of Conus balteatus consists of erranten Vielborstern he with his Radulazähnen stands and using the poison out of his venom gland immobilized. Eunicidae and Nereididae were found in the snail stomachs . Eunice afra is the main prey on coral reefs below the intertidal zone in the eastern Indian Ocean .
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] balteatus Sowb., P. 21.
- Jerry G. Walls: Cone Shells: A Synopsis of the Living Conidae. TFH Publications, Neptune (New Jersey) 1979. pp. 190-194.
- 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
- ↑ Alan J. Kohn, James W. Nybakken (1975): Ecology of Conus on eastern Indian Ocean fringing reefs: diversity of species and resource utilization. Marine Biology 29, pp. 211-234.
- ^ PJ Leviten (1978): Resource partitioning by predatory gastropods of the genus Conus on subtidal Indo-Pacific coral reefs: The significance of prey size. Ecology 59, pp. 614-631.