单词 | aplacophoran |
释义 | aplacophoran (extremely rare) n WORD FAMILY aplacophoran USAGE EXAMPLESIncredibly, the evidence seems to imply the two aplacophoran groups lost their shells separately — and as recently as 40 million years ago. Scientific American(Dec 31, 2012) n deep-water wormlike mollusks lacking calcareous plates on the body but having fine slimy spicules on the covering mantle Syn|Hyper solenogaster gastropod, univalve a class of mollusks typically having a one-piece coiled shell and flattened muscular foot with a head bearing stalked eyes |
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