Two New Pacific Ocean Species of Hyocrinid Crinoids (Echinodermata), with Comments on Presumed Giant-Dwarf Gradients Related to Seamounts and Abyssal Plains

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1999-07
Authors
Roux, Michel
Pawson, David L.
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University of Hawai'i Press
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Hyocrinus foelli, n. sp. is a small hyocrinid sea lily from the abyssal ferromanganese nodule fields of the North Pacific Ocean. Hyocrinus giganteus, n. sp. is a very large hyocrinid from Horizon Seamount in the eastern Pacific that shows close affinities to H. cyanae from the western Pacific, off New Caledonia. A possible giant-dwarf heterochronic gradient, related to scarcity of food supply in abyssal plains and its abundance in seamount environments, is discussed.
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Roux M, Pawson DL. 1999. Two new Pacific Ocean species of hyocrinid crinoids (Echinodermata), with comments on presumed giant-dwarf gradients related to seamounts and abyssal plains. Pac Sci 53(3): 289-298.
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