| author | date | title | journal / publication | Ladurner P, Mair GR, Reiter D, Salvenmoser W, Rieger RM | 1997 | Serotonergic nervous system of two macrostomid species: recent or ancient divergence? | Invertebr Biol 116: 178-191 |
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| Macrostomum pusillum Ax, 1951 | [with synonyms] | w | other research on this sp. | |
| Macrostomum hystricinum Beklemischev, 1951 | [with synonyms] | w | other research on this sp. |