General cone
| General cone | ||||||||||||
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Housing of the conus generalis |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Conus generalis | ||||||||||||
| Linnaeus , 1767 |
The General cone or the general-cone shell ( Conus generalis ) is a screw from the family of the cone snails (genus Conus ), which in Indopazifik is used and from Vielborstern in particular from the family Eunicidae fed.
features
Conus generalis bears a medium-sized to large, moderately firm to heavy snail shell , which in adult snails reaches 5 to 10 cm in length. The circumference of the body is conical to narrowly conical, the outline is straight and only alternately concave below the shoulder. The shoulder is angled. The thread is low with medium high, its outline deeply concave with a cone-like apex from the first 6 to 10 circumferences of the teleoconch, which rise from the otherwise flat thread. The Protoconch has three and a half to four whorls and measures a maximum of 0.7 to 0.8 mm. The first 4 to 5 whorls of the teleoconch are clearly covered with tubercles, which disappear on the following 1 to 2.5 whorls. The seam ramps of the Teleoconch are flat to alternately concave with lapsed spiral stripes. The body is at the base with fine ribs running spirally at alternating intervals, but the sculpting disappears with large individuals.
The basic color of the housing is white and is often highlighted with orange to red in the Indian Ocean. The body is covered from the base to the shoulder or its seam ramp with orange-brown to brownish-black, continuous or interrupted axial stripes, flames or zigzag lines. On each side of the center, the axial drawings are overlaid with an alternately wide, yellow, orange, brown or black, mostly continuous spiral band, which in an animal can vary from light to dark. The band towards the base is occasionally, the band towards the apex seldom divided into 2 or 3 narrow bands. In between, bands in the basic color are usually interwoven with brown or black axial markings. Extending from the base to the shoulder are dotted and dashed, sometimes continuous, spiral lines that vary in number and occasionally have white markings in between. The base is purple to brown or black. The whorls of the protoconch are pink. The seam ramps of the first whorls of the Teleoconch are without spots, on the later whorls with orange-colored to blackish-brown or black radial markings. There are both heavily patterned and almost monochrome shells, with the latter having an almost spotless orange to reddish-dark yellow body circumference and a very sparse spotted thread before western Thailand , southern India and the Maldives . The inside of the case mouth is white to bluish-white with the exception of the base.
The thin to moderately thick, translucent to opaque, smooth or covered with fine axial ribs periostracum is yellowish-brown to dark gray.
The foot is yellowish gray, its upper side also has a brown wash pattern and white dots, the edge areas pale yellow, the distal front section with a reddish-brown central spot and brown dots in front of the rostrum. The rostrum and antennae are yellow, the sipho pale yellowish-brown, proximally paler with white spots and a brown tip.
distribution and habitat
Conus generalis is distributed throughout the Indo-Pacific from the Red Sea and Tanzania via Madagascar , Mascarene , Mauritius , the Maldives , India , Indonesia and the Philippines to Australia , French Polynesia and the Ryūkyū Islands . It lives in the intertidal zone and down to a depth of about 50 m, in the Philippines up to 240 m on coarse sand, muddy sand and coral rubble, often under dead corals.
nutrition
The prey of Conus generalis consists of Vielborstern particular family Eunicidae he with his Radulazähnen stands and with the help of the poison from the venom gland immobilized. On the northeast coast of New Guinea, Conus generalis ate not only the eunicid Eunice australis but also Onuphis heterobranchiata from the family Onuphidae , both errant , highly mobile, predatory polychaetes.
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] generalis Linn., P. 34.
- 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 generalis Linnaeus, 1767
- Underwater Kwajalein: Conus generalis Linnaeus, 1767
Individual evidence
- ^ Alan J. Kohn (2001): Maximal species richness in Conus: Diversity, diet and habitat on reefs of northeast Papua New Guinea. Coral Reefs 20 (1), pp. 25–38, here 31.