heart urchins

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• heart urchin — an echinoderm of the order Spatangoida, having an elongate, somewhat heart shaped outer covering. [1835 45] * * * ▪ echinoderm  any echinoid marine invertebrate of the order Spatangoidea (phylum Echinodermata), in which the body is usually oval… …   Universalium

• Alyss Heart — is a fictional character in The Looking Glass Wars and its sequel, Seeing Redd by Frank Beddor. The stories are based on Lewis Carrol s Alice in Wonderland books and Alyss is based on the character Alice. The preface of the novels is that… …   Wikipedia

• echinoderm — /i kuy neuh derrm , ek euh neuh /, n. any marine animal of the invertebrate phylum Echinodermata, having a radiating arrangement of parts and a body wall stiffened by calcareous pieces that may protrude as spines and including the starfishes, sea …   Universalium

• Sea urchin — Taxobox name = Sea urchin image width = 250px image caption = Sea urchins, Sterechinus neumayeri regnum = Animalia phylum = Echinodermata subphylum = Echinozoa classis = Echinoidea classis authority=Leske, 1778 subdivision ranks = Subclasses… …   Wikipedia

• Echinoderm — Temporal range: Cambrian–recent …   Wikipedia

• Jurassic Period — Interval of geologic time, 206–144 million years ago, that is one of the three major divisions of the Mesozoic Era, preceded by the Triassic Period and followed by the Cretaceous. During the Jurassic, Pangea began to break up into the present day …   Universalium

• sand dollar — any of various flat, disklike sea urchins, as Mellita testudinata or Echinarachnius parma, that live on sandy bottoms off the coasts of the U.S. [1880 85, Amer.] * * * Any echinoderm (order Clypeastroida, class Echinoidea) that has a coinlike,… …   Universalium

• Spatangidae — Spatangus purpureus Scientific classification Kingdom: Animalia …   Wikipedia

• Exocycloida — noun flat sea urchins • Syn: ↑order Exocycloida • Hypernyms: ↑animal order • Member Holonyms: ↑Echinoidea, ↑class Echinoidea • Member Meronyms: ↑ …   Useful english dictionary

• spatangus — spəˈtaŋgəs noun Usage: capitalized Etymology: New Latin, from Greek spatangēs, a kind of sea urchin : an ill defined genus (the type of the family Spantangidae) of sea urchins including many of the commonest and best known heart urchins …   Useful english dictionary

• Sea potato — may refer to :*Leathesia difformis a species of Brown algae * Species of littoral Sea urchins, especially Heart urchins …   Wikipedia