The straight conical shell typical of early nautiloid cephalopods; a fossil having such a shell.
| 单词 | θ33291 |
| 释义 | the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Cephalopoda > [noun] > order Tetrabranchiata > family Nautilidae > member of > parts of > conical shell (1) orthocone1900 The straight conical shell typical of early nautiloid cephalopods; a fossil having such a shell. |
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