Worm cones
| Worm cones | ||||||||||||
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Housing of Conus chaldaeus |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Conus chaldaeus | ||||||||||||
| ( Röding , 1798) |
The worm cone ( Conus Chaldaeus , synonym Conus vermiculatus Lamarck ) is a screw from the family of the cone snails (genus Conus ), which in Indopazifik is used and from Vielborstern fed.
features
Conus chaldaeus carries a small, thick-walled, solid snail shell , which in adult snails reaches a length of about 3.3 cm and a diameter of about 1.9 cm in length. The body is broadly conical, the outline slightly convex. The thread is medium high. The whorls are sculptured with spiral stripes, and both the whorls and the shoulder of the whorl are crowned with blunt tubercles. The spiral stripes become grainy on the perimeter of the body towards both the apex and the base. The case mouth is narrow and its outer lip is lined at the base.
The basic color of the case is white, sometimes pink, with three or four spiral bands, which are composed of irregular, longitudinally running dark brown to black markings and thus make the case appear more black than white. A spiral white stripe remains free in the middle of the body and on the shoulder. The inside of the case mouth is blue and white with the outer color pattern showing through the outer lip. The thin periostracum is yellow.
The snail's foot is black. In the middle of the sole of the foot there is a broad, dark yellow longitudinal stripe. The sipho and rostrum are black with a red tip.
distribution and habitat
Conus chaldaeus is distributed throughout the Indo-Pacific including the Red Sea , but also in the eastern Pacific Ocean on the coasts of El Salvador , Guatemala , Honduras , Mexico , Nicaragua and Panama . It is common on Clipperton Island and can also be found on the coasts of New Zealand and Australia ( New South Wales , Northern Territory , Queensland , Western Australia ).
Conus chaldaeus lives especially on the outer edge of coral banks .
Development cycle
Like all cone snails, Conus chaldaeus is sexually separate and the male mates with the female with his penis . The eggs in the egg shell develop into Veliger larvae, which after a free-swimming phase sink down as plankton-eating zooplankton and metamorphose into crawling snails .
nutrition
The prey of Conus Chaldaeus consists exclusively of Vielborstern he with his Radulazähnen stands and using the poison out of his venom gland immobilized. In the screw stomachs in waters of Hawaii - and the Marshall Islands were Nereididae , including Platynereis dumerilii and to a lesser extent Perinereis helleri and Eunicidae , including Palola siciliensis found.
literature
- Dennis M. Devaney, E. Alison Kay, Lucius G. Eldredge: Reef and Shore Fauna of Hawaii, vol. 4. BP Bishop Museum Special Publication 64 (1), 1979. p. 370.
- George Washington Tryon: Manual of Conchology, structural and systematic, with illustrations of the species , vol. VI; Academy of Natural Sciences, Philadelphia 1884. C [onus] hebraeus Linn., Var. Vermiculatus Hwass., P. 20.
- Jerry G. Walls: Cone Shells: A Synopsis of the Living Conidae. TFH Publications, Neptune (New Jersey) 1979. p. 310.
Web links
Individual evidence
- ^ Alan Kohn, in: Claus Nielsen (2013): Life cycle evolution: was the eumetazoan ancestor a holopelagic, planktotrophic gastraea? . BMC Evolutionary Biology 13, Art. 171, p. 9. Figure 8. The occurrence of “direct” development in the gastropod genus Conus. Conus chaldaeus : planktonic larvae, planktotrophic.
- ^ Alan J. Kohn: Prey Organisms Eaten by Conus ebraeus and Conus chaldaeus. In: Alan J. Kohn, Gordon H. Orians: Ecological Data in the Classification of Closely Related Species. In: TM Hammonds: The Commodity Futures Market from an Agricultural Producer's Point of View . P. 276.