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| Original Usage: | Sphenoecium Chapman & Thomas, 1936 | |
|---|---|---|
| 等级: | Genus |
|
| 拼法: | Spenoecium | |
| 著作权: | Chapman & Thomas | |
| 发表: | Graptolite (Hemichordata, Pterobranchia) preservation and identification in the Cambrian Series 3. Palaeontology. | |
| 页: | ||
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