echinoid


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echinoid

any of the ECHINODERMS of the class Echinoidea, including the sea urchins.
References in periodicals archive ?
Like other echinoids that have been tested, purple sea urchins probably can tolerate, for hours or days, mild to moderate hypoxia (> 0.
Carter & McKinney (1992) presented evidence that distribution patterns in Upper Eocene echinoid faunas were related to facies patterns, particularly in relation to sand/mud ratios.
The tooth was neatly cemented within the calcarenite along with whole echinoids and the abundant calcareous nodules.
7 m), echinoid spines (ra), fish otoliths (ra), mollusc fragments (ra), ostracods (ra), radio larians (spherical, spindle-shaped) (co, ab at 752.
4 Sea urchins Echinoid Palolo worms Eunice viridis Squirrelfish Holocentridae Snappers Lutjanus spp.
Predator and population density control of homing behavior in the Caribbean echinoid Diadema antillarum.
Ogbe (1972) further modified this and proposed a fourth unit, which he said is Paleocene in age and associated with shallow marine environment due to abundance of coralline algae, gastropods, pelecypods, echinoid fragments and other skeletal debris.
The "Corbula Interval" is associated with an underlying limestone unit containing the regular echinoid Salenia texana.
The red sea urchin, Strongylocentrotus franciscanus, is the largest echinoid in kelp forest communities along the west coast of North America and is fished commercially from British Columbia to Baja California (Sloan, 1986).
The contribution of the facultative feeding period to echinoid larval development and size at metamorphosis: a comparative approach.
Echinoid remains, Stromatholite, Radiolaria, Mollusca fragments, Gastropoda, Serpulids, Corals, Stromatoporidea