Phormosoma placenta is a species of sea urchin in the order Echinothurioida. It is a deepwater species, seldom being found at depths less than 500 m (1,600 ft), and occurs on either side of the Atlantic Ocean on the continental slope.
^Kroh, A., Hansson, H. (2012). Kroh A, Mooi R (eds.). "Phormosoma placenta Thomson, 1872". World Echinoidea Database. World Register of Marine Species. Retrieved 2012-12-30.
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Phormosomaplacenta is a species of sea urchin in the order Echinothurioida. It is a deepwater species, seldom being found at depths less than 500 m (1...
also relatively unstudied, but some members of the group, such as Phormosomaplacenta, produce eggs with large yolks which at first rise towards the surface...
back to the seabed as is the case in its more studied relative, Phormosomaplacenta. Kroh, Andreas (2012). Kroh A, Mooi R (eds.). "Calveriosoma gracile...
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