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Eucidaris
''Eucidaris'' is a genus of cidaroid sea urchins known as slate pencil urchins (named after slate pencil). They are characterised by a moderately thick test, a usually monocyclic apical disc, perforate and non-crenulate tubercles and nearly straight ambulacra with horizontal pore pairs. The primary spines are few and widely spaced, stout with blunt flat tips and beaded ornamentation and the secondary spines are short and apressed. They originated in the Miocene and extant members of the genus are found in the tropical Indo-Pacific Ocean, East Pacific, Atlantic Ocean and Caribbean Sea. Species The World Register of Marine Species lists the following species: * '' Eucidaris australiae'' Mortensen, 1950 * † '' Eucidaris coralloides'' Fell, 1954 * '' Eucidaris galapagensis'' Döderlein, 1887 * '' Eucidaris metularia'' (Lamarck, 1816) * † '' Eucidaris strobilata'' Fell, 1954 * '' Eucidaris thouarsii'' (Agassiz & Desor, 1846) * '' Eucidaris tribuloides'' (Lamarck Jean-B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eucidaris Metularia
''Eucidaris metularia'', the ten-lined urchin, is a species of sea urchins in the family Cidaridae. It is found in shallow parts of the Indo-Pacific Ocean and is characterised by its sparse covering of banded, flat-tipped spines. Description ''Eucidaris metularia'' is a primitive species of sea urchin and comes from an ancient lineage that has hardly changed over the past 150 million years. The test is robust and somewhat flattened and up to in diameter. The ambulacra are almost straight and have horizontal pairs of pores. The primary spines are few in number, stout with a truncated tip and distinctively banded. The secondary spines surround the primaries and are more numerous, much smaller and flattened. Distribution and habitat ''Eucidaris metularia'' is found in shallow parts of the Indo-Pacific Ocean. Its range includes the Red Sea, East Africa, Madagascar, the Seychelles, Aldabra and Chagos and extends as far east as Fiji, Hawaii, Japan, and northern Australia. It is a co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |