Red-mouthed frog snail
| Red-mouthed frog snail | ||||||||||||
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Housing made by Tutufa bufo |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Tutufa bufo | ||||||||||||
| ( Röding , 1798) |
The Rotmund Frog screw or chestnut frog screw ( Tutufa bufo ) is a medium size screw from the family of the frog screws (genus Tutufa ) provided in the Red Sea and Indopazifik is widespread.
features
The shell of Tutufa bufo has a short thread and a large oval casing mouth with an almost smooth inner lip. The outside of the case is sculptured with three larger spiral rows in front and behind of compressed, tightly rounded knots, with those in the top row being the largest and merging into particularly large knots at the varices. In addition, the surface is covered with narrow rows of different, low to rough and protruding wrinkles. The outer lip of the case mouth is greatly expanded, its outer edge is fingered by outer spiral ribs and carries a row of 11 to 12 low, tightly rounded nodules on the innermost edge of the fold. The inner lip is broadly flared with a parietal callus delimiting the large, protruding anal canal, and has 3 to 6 folds at the base of the columella, but is otherwise smooth. The anterior siphon canal is short and strongly curved to the right, so that the large, wrinkled fasciole protrudes strongly.
The surface of the case is pale reddish fawn to brown, speckled in various patterns of small, irregular red-brown spots. The inside of the case mouth is pale flesh-colored to white with a dark brown to light red ring around the most constricted area just inside the inner and outer lip.
The house reaches around 10.5 cm, up to 13.5 cm in height with a diameter of around 6.5 cm, up to 8.5 cm, but can often also be 18 cm and sometimes even 30 cm high.
distribution and habitat
Tutufa bufo is widespread in the Indo-Pacific from the East African coast over the Persian Gulf to eastern Polynesia and from the Philippines to Queensland and the Kermadec Islands . The snail is found mainly on coral reefs, but also on sandy ground in the intertidal zone down to depths of 50 m, most often just below the intertidal zone.
Life cycle
Like other frog snails, Tutufa bufo is segregated. The male mates with the female, which is often more than twice as large, with his penis . The egg capsules are about 25 mm long transparent tubes that are attached to a solid base within a round, upright mass. The female incubates these eggs until they hatch and does not leave them during this time, otherwise they will fall prey to small fish and other egg predators. Veliger larvae hatch from the eggs and live as plankton until they have metamorphosed into the finished snail.
food
For Tutufa bufo there are no publications about the food, but out related species feed in the family with a similar radula and a similar tract predatory among other sea squirts , polychaetes and echinoderms .
literature
- AG Beu (1998): Australian gastropods of the family Bursidae. Part 1. Sydney 2003, pp. 280-282.
- JR Houbrick, V. Fretter (1969): Some aspects of the functional anatomy and biology of Cymatium and Tutufa. Proceedings of the Malacological Society of London 38, pp. 415-429.
Web links
- Fischhaus Zepkow: Family Bursidae - frog snails
- Bursidae: Tutufa bufo (Linnaeus, 1758). From: JM Poutiers: Gastropods . In: Kent E. Carpenter, Volker H. Niem (Eds.): FAO Species identification guide for fishery purposes. The living marine resources of the Western Central Pacific. Volume 1: Seaweeds, corals, bivalves and gastropods. Food and Agriculture Organization of the United Nations, Rome, 1998. p. 552.
Individual evidence
- ^ A b Neville Coleman: A Field Guide to Australian Marine Life. Rigby, 1977. p. 91.
- ↑ JR Houbrick, V. Fretter (1969): Some aspects of the functional anatomy and biology of Cymatium and Bursa. Proceedings of the Malacological Society of London 38, pp. 415-429.
- ↑ Underwater Kwajalein: Family Bursidae - Bursa rhodostoma (Sowerby, 1835) (...) eating an Echinothrix urchin , August 10, 2010 / September 12, 2011; Tutufa rubeta (Linnaeus, 1758) (...) feasting on a crinoid , August 10, 2010 / May 20, 2012; Bursa granularis (Röding, 1798) (...) eating the arm of a brittle star , August 10, 2010 / September 20, 2013; accessed on April 18, 2018.
- ^ Frank Riedel (1995): An outline of Cassoidean phylogeny (Mollusca, Gastropoda). Contr. Tert. Quatern. Geol. 32 (4), pp. 97-132, here p. 101.