A Benthic Invertebrate from the Mid-Atlantic Ridge
About 100 deep-sea photographs revealed discoidal shaped objects several centimeters in diameter with marked hexagonal symmetry lying on sediment-covered step-like levels of the wall of the rift valley of the Mid-Atlantic Ridge at latitude 26°N between depths of 3200 and 3700 m below sea level. The characteristics of the discoidal shaped objects, including the symmetry and inferred individual growth stages, are closest to compressed forms of a hexactinelid sponge adapted to an unconsolidated sediment substrate.
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Document Type: Short Communication
Publication date: April 1, 1978
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