Spring cone
| Spring cone snail | ||||||||||||
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Housing of Conus pennaceus |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Conus pennaceus | ||||||||||||
| Born , 1778 |
The feather cone , also the feather cone snail ( Conus pennaceus ) is a snail from the family of cone snails (genus Conus ), which is distributed throughout the Indo-Pacific . It mainly feeds on mollusks .
features
According to Ignaz von Born's first description of Conus pennaceus , “the conical bowl [...] is painted with dotted transverse lines and scattered whitish feather-shaped spots. The bowl is conical, dense and smooth, the thread blunt, the lower threads flat, the upper ones raised pyramidal in the middle and pointed, vermilion with red-brown cross lines composed of dots. The scattered white or white-blue spots are feather-shaped. "
In adult snails, the shell is 3.5 to 8.8 cm in length. The basic color is white, the periostracum grayish to brownish yellow, thin, translucent and smooth.
The top of the white foot, like the white antennae, is speckled with brown. The sole of the foot is speckled light and dark brown. The white sipho is also speckled brown and has a black ring and an orange-red tip. The rostrum turns distally to beige and has blackish-brown transverse lines.
The radula teeth connected to a poison gland have a laterally inflated barb on the tip and an even larger second barb on the opposite side. They are sawn from the barb along the outside of a third of the shaft. A third of the tooth base has a noticeable point on the shaft. The waist and spur are absent.
distribution
The cone of feathers occurs in the Red Sea and the Indian Ocean , but not on the coast of India, in the Pacific Ocean around Hawaii .
habitat
Feather cones live below the intertidal zone of coral reefs and on the coast of the mainland up to 50 m depth on rocks and sand.
Life cycle
Like all cone snails, Conus pennaceus is separate sexes, and the male mates with the female with his penis . The female attaches the egg packets to a firm surface. An egg packet has about 60 egg capsules measuring 14 to 17 mm by 10 to 11 mm off the Maldives and about 35 egg capsules measuring 8.5 to 13 mm by 7 to 10 mm around Hawaii. Large, well-developed Veliger larvae hatch out of the egg capsules , which in turn undergo a metamorphosis into snails. Off the Maldives, an egg capsule contains 480-660 eggs with a diameter of 375 to 407 µm. From this it is concluded that the pelagic period of the Veliger lasts about seven days. Off Hawaii, an egg capsule contains 25-250 eggs with a diameter of 470 to 520 µm. The hatching Veliconcha metamorphoses into a finished snail within a day.
food
Conus pennaceus eats snails - both front and rear gills - but apparently not cone snails. The prey is stabbed in the foot with the poisonous harpoon tooth. Feather cones have been observed to eat carrion on the coast of Mozambique .
Enemies
To the enemies of the spring cone belonging Conus textile ( Conus textile ).
literature
- 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).
Individual evidence
- ↑ Ignaz von Born : Index rerum naturalium musei Caesarei Vindobonensis. Directory of the natural rarities of the Imperial and Royal Naturalien Cabinet in Vienna. Volume 1: Testacea. Kraus, Vienna 1778. pp. 151–152: C. III. 10. Conus pennaceus. The feather bag. (Reprint: sl, Nabu Press 2010, ISBN 978-1-149-41770-6 ).
Web links
- The Conus Biodiversity Website: Conus pennaceus Born, 1778
- Conus pennaceus inthe IUCN 2013 Red List of Threatened Species . Posted by: Raybaudi-Massilia, G., 2011. Accessed February 16, 2014.