The straight conical shell typical of early nautiloid cephalopods; a fossil having such a shell.
| 单词 | θ33231 |
| 释义 | the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Cephalopoda > [adjective] > belonging to order Tetrabranchiata > relating to the nautili > of or relating to conical shell (2) orthocone1900 The straight conical shell typical of early nautiloid cephalopods; a fossil having such a shell. orthoconic1926 Of a nautiloid cephalopod: having a straight (or nearly straight) conical chambered shell (orthocone). Also: designating such a shell. |
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