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珠螺
来自维基百科，自由的百科全书
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珠螺（学名：Lunella coronata，台湾话：tsu-lê），台湾澎湖当地俗称大头仔（台湾话：tuā-thâu-á）、大头螺仔（台湾话：tuā-thâu-lê-á），是钟螺目蝾螺科珠螺属的一个腹足纲软体动物物种[2]。
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形态描述
The shell grows to a length of 4 cm, with conspicuous flattened, cup-like scales interspersed by small, regular rows of nodules. The colour of the shell is pale to greenish, flecked with purplish-brown markings (often encrusted with light pink coralline algae). The 螺厣 is smooth to faintly granular with pale green centre. (Richmond, 1997).
The solid, imperforate shell has a depressed-turbinate shape with a diameter greater than the altitude. It is covered with an irregular spiral series of nodules and granules, of which the subsutural series and two on the median portion of the body whorl are more prominent. The spire is depressed, dome-shaped with an apex that is frequently eroded and red. The shell contains 4 to 5 whorls, the last very large. The large 壳口 is round and iridescent within. The wide columella is flattened and excavated, deflexed recurved and somewhat channelled at its base, The inside of the 螺厣 is flat, greenish and golden, iridescent, with about 5–6 whorls and a subcentral nucleus. Its outside is convex, greenish, sparsely granulate all over.
The species is subject to a wide variation. The passage from the strongly tuberculate forms into those in which the transverse striae simply cut the lirae into diamonds or granules is made by imperceptible degrees.[3]
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分布
栖息地
常栖息在沿海岩砾或岩礁的潮间带及或潮池，以岩礁上的海藻生物为食[1]
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