from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Plural form of echinoid.
Sorry, no etymologies found.
There is a rich invertebrate fauna with thousands of remains, large and small, of nummulites, molluscs, gastropods, bivalves, echinoids and crabs, which, with the remains of plants, permit reconstruction of the ecology and habitat of the animals.
Intermingled among the shops, attractions and restaurants of Pier 39, two nonprofit organizations - Aquarium of the Bay and the Marine Mammal Center - offer places to better understand the fish, echinoids, marine mammals and other life inhabiting San Francisco Bay and
Given that the current estimate of the total number of species on the planet is about 2 million, this rate, by the end of the next century, will be equivalent in biological effect to the catastrophic event (s) of 65 million years ago that eliminated not only the dinosaurs but also the ammonoid cephalopods, many echinoids, and many genera of foraminifera and of calcareous phytoplankton, the kind of mass extinction that previously in the earth's history has required 5 million years for recovery, such recovery resulting in