| author | date | title | journal / publication | Culioli J-L, Foata J, Mori C, OrsiniA, Marchand B | 2004 | Ultrastructure of spermiogenesis and the spermatozoon in Castrada cristatispina Papi, 1951 (Platyhelminthes, Rhabdocoela, Typhloplanoida). | Acta Zool (Stockh) 85: 245-256 |
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