- n. Plural form of echinoderm.
“Spiny sea urchins are members of the animal group called echinoderms Greek for”
“Hertwig has shown that the tiny transparent ova of the echinoderms are the most convenient for following the details of this important process of impregnation.”
“Traditionally, one certain way of distinguishing between Pre-Cambrian and later strata has been on the basis of the absence or presence of organisms with hard parts, or with the proven internal complexity of forms such as echinoderms and coelenterates.”
“Our research highlights the poor understanding of large-scale carbon processes associated with calcifying animals such as echinoderms and tackles some of the uncertainties in the oceanic calcium carbonate budget," says Lebrato: "The realisation that these creatures represent such a significant part of the ocean carbon sink needs to be taken into account in computer models of the biological pump and its effect on global climate.”
“We draw attention on the need for a major re-assessment of the contribution of benthic organisms such as echinoderms to the global marine carbonate cycle", said Mario Lebrato, lead author of the study.”
“The same mitochondrial DNA sequences placed echinoderms - which include starfish and sea urchins - in closer proximity to the vertebrates than amphioxus even though, being a chordate, we would expect amphioxus to be closer (Ref 2).”
“Radial symmetry is just in the echinoderms and the jellies.”
“Other dispersed larvae abundant in the Gulf are those of echinoderms and molluscs 453 species of which are reported.”
“The Permian extinction, 244 million years ago, devastated the marine biota: tabulate and rugose corals, blastoid echinoderms, graptolites, and most crinoids died out, as did the last of the trilobites.”
“Later Paleozoic seas were dominated by crinoid and blastoid echinoderms, articulate brachiopods, graptolites, and tabulate and rugose corals.”
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