| Date | 1818 |
| Author | Bojanus |
| Contribution | Observed that cercariae come from rediae within snails. |
| Reference | Grove |
| Notes | See Nitzsch (or Nitzch) 1817. In seeing cercariae emerging from non-similar "parent", Bojanus anticipated the theory of Alternation of Generations. |
| Category | Miscellany |
| Pathogen Class | Helminths |
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