Two New Species of Freshwater Planarian (Platyhelminthes, Tricladida, Dugesiidae, Dugesia) from Southern China Exhibit Unusual Karyotypes, with a Discussion on Reproduction in Aneuploid Species

Figure 11

Dugesia musculosa. Photomicrographs of transverse (a, b), horizontal (c), and sagittal (d–f) sections. (a, b) Paratype ZMHNU-YFXHA8, showing asymmetrical openings sperm ducts and well-developed circular muscles around bursal canal. (c) Paratype ZMHNU-YFXHA7, showing well-developed circular muscles around bursal canal and gonoduct. (d) Holotype ZMHNU-YFXHA4, showing well-developed circular muscles around bursal canal and gonoduct. (e) Holotype ZMHNU-YFXHA4, showing penis papilla and seminal vesicle. (f) Holotype ZMHNU-YFXHA4, showing penis papilla, wide ejaculatory duct, large seminal vesicle, two diaphragms, and spermatophore. Scale bars: 100 μm. Abbreviations: spt, spermatophore; for other abbreviations, see captions of Figures 9 and 10.

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