sand dollar scientific name

As they resembled the large coins in use back then, and had a repetitive design, they earned their monetary-linked name. Purple sand dollar (Encope michelini) E-1631 PURPLE SAND DOLLAR, Encope … Unlike most organisms, the male and female don't even have to touch. Gently turn the sand dollar over and look for tiny, centipede-like feet or hairs on its bottom side. They are an abundant flattened burrowing sea urchin that normally lies buried just beneath the sand. E-1630 KEYHOLE SAND DOLLAR, Mellita quinquiesperforata. Each: $6.75 Dozen: $36.50 . The hard, bleached “sand dollars” you may see washed up on the beach are not shells, but are actually the skeletons of the sand dollar animal. Eccentric Sand Dollar (Dendraster excentricus) KINGDOM Animalia PHYLUM Echinodermata CLASS Echinoidea ORDER Clypeasteroida FAMILY Dendrasteridae One of the most characteristic animals of clean sand bottoms in quiet bays everywhere on the Pacific Northwest coast is this flattened relative of the sea urchins.
The name “sand dollar” is a bit unusual, albeit memorable, and comes from centuries ago, when explorers began finding these unusual “rocks” on beaches. Suggestions for the function of these slots range from helping the animal to burrow, right itself, find food or to prevent the waves from lifting it out of the sand. It crawls around making characteristic U-shaped trails in the sand unselectively picking out food particles with its cilia. Sand dollars can be found in the temperate and tropical parts of Atlantic and Pacific Ocean. Sand dollars burrow beneath the sand of the sea floor to protect themselves from predators and debris. The last is the most widely accepted explanation. Sand dollars can be found in temperate and tropical zones, but not in Great Britain.

All sand dollars have a rigid skeleton known as a test. Sand dollars are a kind of sea urchin – and like their spiky relatives, they’re also covered in spines… just very, very small ones. They are closely related to starfish, sea cucumbers and sea urchins.

If you dig up a sand dollar underwater, there's a good chance that it's alive. They live on the sandy sea floor, usually in the intertidal zone (near the beaches), or (rarely) away from the shore, on a depth of 30 feet.
While alive, sand dollar Sand is a granular material composed of finely divided rock and mineral particles. Sand dollars are marine invertebrates that belongs to the group of echinoderms. The Keyhole sand dollar got its common name from the intriguing slot-shaped holes in the body (called lunules). Echinarachnius parma, the Common Sand Dollar, is widespread in the Northern Hemisphere, from the intertidal zone to considerable depths. p76. In some sandy areas, these echinoderms are so common as to virtually cover the …


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