Simdyanov, T.G. (2009). [Difficilina cerebratuli gen. et sp. n. (Eugregarinida: Lecudinidae)--a new gregarine species from the nemertean Cerebratulus barentsi (Nemertini: Cerebratulidae)]. Parazitologiia, 43(4): 273-287. [Article in Russian]
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Simdyanov, T. G.
2009
Difficilina cerebratuli gen. et sp. n. (Eugregarinida: Lecudinidae)--a new gregarine species from the nemertean Cerebratulus barentsi (Nemertini: Cerebratulidae