| author | date | title | journal / publication | Schärer L, Ladurner P, Rieger RM | 2004 | abs. | Bigger testes do work more: experimental evidence that testis size reflects testicular cell proliferation activity in the marine invertebrate, the free-living flatworm Macrostomum sp. | Behavioral Ecology and Sociobiology 56: 420-425 |
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| Macrostomidae Macrostomum Schmidt, 1848 | [with synonyms] | w | other research on this sp. |