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Echinoderms are considered particularly sensitive to ocean acidification (OA) as their skeleton is made of high-magnesium calcite… Expand The structure and development of the larval nervous systems of all classes of echinoderms have been described and details of… Expand Regular sea urchins substrate association (Echinodermata: Echinoidea) on Isla Verde lagoon reef, Veracruz, Mexico. The diversity… Expand Dry matter, ash, crude protein, and protein precipitation activity (PPA) of 13 Nepalese tree fodder species were monitored in… Expand SummaryIn embryos of the “modern” sea urchin species, subclass Euechinoidea, primary mesenchyme cells are derived from the… Expand The principle of economy that emerged from the views of William of Occam, namely that where alternative hypotheses exist, the one… Expand Previous models of reversible catch in echinoid spines, as a property of muscle or of collagen, are briefly reviewed and… Expand 1. The articular capsule or ligament, of the primary spines of the sea-urchin Eucidaris tribuloides behaves as a classical… Expand 1. The changes in the consistence of the spine-test articular capsule, or ligament, of the primary spines of Eucidaris… Expand