Conus flavidus
| Conus flavidus | ||||||||||||
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Conus flavidus , Réunion |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Conus flavidus | ||||||||||||
| Lamarck , 1810 |
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Conus flavidus ("yellowish cone") is the species name of a snail fromthe cone snail family (genus Conus ), which iswidespreadin the Indo-Pacific . It feeds on poly-bristles and acorn worms .
features
Conus flavidus carries a medium-sized to moderately large, moderately light to moderately heavy snail shell , which reaches 3.5 to 7.5 cm in length in adult snails. The circumference of the body is conical to broadly conical, occasionally slightly bulbous conical, the outline at the quarter to third at the apex alternately convex, more towards the base almost straight, in the middle in large specimens sometimes slightly concave. The shoulder is angled or almost angled. The thread is usually low, its outline slightly concave to slightly convex. The seam ramps of the Teleoconch are flat to slightly concave, the later ramps with numerous stripes, with 3 to 6 spiral grooves or a sculpture in between. The circumference of the body is covered at the base with spirally running, conspicuous to decrepit, clearly separated grooves, of which those towards the shoulder are always obsolete and not granular.
The basic color of the housing is light yellowish to orange or pinkish brown, occasionally brownish green. The perimeter of the body has a pale or white spiral band in or just below the middle and on the shoulder, the shoulder band sometimes being absent and the central band seldom missing. The base is purple blue. The whorls of the Protoconch change their color from white to pink during the metamorphosis . The first seam ramps of the Teleoconch vary from white to the color of the body. The case mouth is purple to purplish blue with pale bands near the center and below the shoulder.
The thick, opaque and quite smooth to fibrous periostracum is gray to brown and has transverse ribs in almost adults.
The top of the foot has a mottled gray and brown pattern with white dots, the central section lighter, the front and rear sections with a black transverse stain. The front of the foot is sometimes white to yellow. The sole of the foot is yellow-brown, spotted brown and striped with a few white spots. The rostrum is yellow and goes dorsally into yellowish-brown, sometimes with dark brown spots. The antennae are white, yellow or yellowish-brown, sometimes dorsal brown or black spots. The siphon is gray or dull yellow, yellow on the edge and often spotted white, with a black band in front of the middle and a grainy dark gray band behind the middle, while the proximal part may be spotted black.
The radula teeth connected to a poison gland have a barb on the tip and a cutting edge on the opposite side. They are usually sawn over a long distance to over half the shaft, ending in a backward-pointing point. There is usually a clear spur at the base.
distribution and habitat
Conus flavidus is widespread throughout the Indo-Pacific from the Red Sea to Australia ( Northern Territory , Queensland , Western Australia ). It lives in the intertidal zone and down to a depth of about 10 m on reefs, in small sand-filled depressions, on limestone and rocks with algae, coral shill with or without sand, under rocks and corals.
Development cycle
Like all cone snails, Conus flavidus is sexually separate, and the male mates with the female with his penis . The female lays about 8.5 to 14 mm long and 6.5 to 11 mm wide capsules with a short stalk in parallel rows under rocks below the intertidal zone near the reef crown. The eggs inside are about 175 to 223 µm in size, from which it is concluded that the Veliger larvae swim freely for at least 21 to (at 175 µm) 26 days. Off Hawaii the plankton phase of the larvae lasts 23 days before they sink down and metamorphose into crawling snails .
nutrition
Conus flavidus eats sedentary polychaete (Polychaeta) of the families Terebellidae , Maldanidae and Capitellidae , rarely acorn worms , wherein the prey spectrum changes depending on the location and habitat.
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] flavidus Lam., P. 44.
- Jerry G. Walls: Cone Shells: A Synopsis of the Living Conidae TFH Publications, Neptune (New Jersey) 1979. pp. 474f.
- 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).
