| 单词 | keyhole urchin |
| 释义 | > as lemmaskeyhole urchin keyhole urchin n. any of various sand dollars having one or more elongated perforations in the test and belonging to the family Mellitidae or related families; esp. one of the genus Mellita of the Atlantic coasts of America. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [noun] > subphylum Eleutherozoa > class Echinoidea > order Clypeastroidea > member of > member of genus Mellita keyhole urchin1868 1868 A.A. Tenney Pictures & Stories Animals 41 The name of this curious sea-urchin is Mellita..also sometimes called the Key-hole Urchin. 1904 H. L. Clark in Bull. U.S. Fish. Comm. 1902 XXXII. 565 Mellita pentapora (Gmelin). Key-hole Urchin. 2008 D. Brown Fly Fishing Bonefish 62/1 The Five-Holed Keyhole Urchin..lives just beneath the surface, creating a thin mound over its body. < as lemmas |
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