Of a chambered shell: having the septal necks of the siphuncle directed forward, as in some ammonoids.
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| 单词 | θ33220 |
| 释义 | the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Cephalopoda > [adjective] > having siphonal funnel forward (of shell) (1) prosiphonate1935 Of a chambered shell: having the septal necks of the siphuncle directed forward, as in some ammonoids. |
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