The small conical or dagger-shaped structure secreted by and containing the initial member of a colony of graptolites.
单词 | θ31489 |
释义 | the world > animals > invertebrates > zoophyte > [noun] > fossil zoophyte > of genus Graptolites > colony of conjoined graptolites > structure containing initial member of (1) sicula1893 The small conical or dagger-shaped structure secreted by and containing the initial member of a colony of graptolites. |
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