Noble cone snail
| Noble cone snail | ||||||||||||
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Housing of Conus nobilis |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Conus nobilis | ||||||||||||
| Linnaeus , 1758 |
The noble cone snail ( Conus nobilis ) is a snail from the family of cone snails (genus Conus ), which is widespread in the Indo-Pacific .
features
Conus nobilis carries a moderately small to medium-sized, moderately firm to firm snail shell , which in adult snails reaches 3 to 7 cm in length. The circumference of the body is conical, occasionally narrowly conical or approximately conical cylindrical, the contour in the quarter at the apex is slightly convex, otherwise straight. The shoulder is keeled. The thread is low, its outline alternately concave to slightly S-shaped. The apex can protrude from the otherwise almost flat thread. The Protoconch has about 2 whorls and measures a maximum of 0.7 to 0.8 mm. The later passages of the Teleoconch are keeled. The seam ramps of the Teleoconch are flat, slightly concave in the later whorls with clear axial threads and 5 out of 10 to 14 increasing spiral grooves at regular intervals as well as fine spiral grooves on the later seam ramps. The third of the circumference of the body is covered at the base with weak grooves running spirally at alternating intervals, between which ribs at the front end and ligaments run to the shoulder.
The basic color of the housing is white. The body around the body has a yellowish to dark brown pattern of reticulated drawings and spiral bands that varies depending on the location. There are forms with an almost regular network and rather sparse brown spots, but also forms with occasionally interrupted to continuous brown spiral bands that separate 3 to 4 zones with concentrated white tent patterns at the base, in the middle and below the shoulder. There are brown areas with prominent spiral rows of alternating dark brown and white, mainly axial lines and points. White markings range from very small tent patterns to small spots and have dark brown edges towards the outer lip of the housing mouth. The base is pale purple. The protoconch is pale pink, darker pink in the rear coils. The sewing ramps of the early whorls of the Teleoconch are pink to orange. The late suture ramps have yellowish to dark brown radial stripes and spots that unite with the pattern of the body and contain fine, darker radial lines. The inside of the case mouth is white and has a pale purple or pale brown background.
The very thin, translucent, smooth periostracum is yellowish-gray.
The top of the foot is brown and merges into the cream color towards the back. The front section has cream-colored radial stripes, the central section has isolated cream-colored spots and the rear section has sparse brown radial markings. The rostrum and antennae are cream colored. The sipho has a brown base, which is followed distally by a narrow cream-colored, a wide black and a wide cream-colored transverse band and a pink border.
The radula teeth connected to a poison gland have a laterally inflated barb on the tip and a tiny barb on the opposite side. They are sawn, with a waist in the middle and a spur at the base.
distribution and habitat
Conus nobilis is widespread in the Indo-Pacific from Sri Lanka , the Andaman and Nicobar Islands via Sumatra and Jawa to Timor and the Marquesas . It lives in the intertidal zone and below it to a depth of about 10 m on surfaces with sand that contains chamberlings , with clear water and a light current.
nutrition
The feeding behavior and prey of Conus nobilis have not yet been directly investigated. Due to the shape of the fangs , it is assumed that the cone snails of the subgenus Eugeniconus and thus also Conus nobilis eat snails .
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] nobilis Linn., P. 30.
- Guido T. Poppe, Sheila P. Tagaro (2011): A New Subspecies of Conus nobilis Linnaeus, 1758 from Solor Island, Indonesia. Visaya 3 (3), pp. 83-90.
- 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
- ↑ N. Puillandre, TF Duda, C. Meyer, BM Olivera, P. Bouchet (2015): One, four or 100 genera? A new classification of the cone snails. Journal of Molluscan Studies 81, pp. 1-23.