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Hemiplacophora
| Hemiplacophora | |
| Cookson, I.C. and Eisenack, A. (1965a) | |
| Stover, L.E. and Evitt, W.R. (1978) | |
| Active | |
| Subfamily Gonyaulacaceae/Uncertain | |
| semilunifera | |
| 37 | |
| 33 | |
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No synonyms
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No synonyms
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