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Echinocardium cordatum
''Echinocardium cordatum'', or the sea potato, is a sea urchin in the family Loveniidae. It is found in sub-tidal regions in temperate seas around the world and lives buried in the sandy sea floor.
==Description==
The sea potato is a heart-shaped urchin clothed in a dense mat of furrowed yellowish spines which grow from tubercles and mostly point backwards. The upper surface is flattened and there is an indentation near the front. This urchin is a fawn color but the tests that are found on the strandline have often lost their spines and are white. During life, the spines trap air which helps prevent asphyxiation for the buried urchin.〔(European Marine Life )〕 The ambulacrum forms a broad furrow in a star shape extending down the sides of the test. There are two series each of two rows of tube feet. The test reaches from six to nine centimeters in length.〔(Marine Life Information Network )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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