| 11. | The epiphallus has 3-4 longitudinal folds proximally, transversing into anatosmosing folds more distally.
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| 12. | Reproductive system : The penis is rounded, wider than and approximately as long as the epiphallus.
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| 13. | The epiphallus is slightly curved and inside a short penis prolongation distance between penis and the pedunculus is very short.
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| 14. | The Genitalia : the penis is present only in some species, epiphallus is present in nearly all of them.
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| 15. | The sperm container is formed in the epiphallus, while the spermatophore's tail is formed by the flagellum.
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| 16. | Vas deferens of " Tamdonia serbica " is shorter, delimited from epiphallus, epiphallus shorter, penis larger.
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| 17. | Vas deferens of " Tamdonia serbica " is shorter, delimited from epiphallus, epiphallus shorter, penis larger.
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| 18. | The epiphallus lophi are saddle-like in shape with the mesal protuberance of the lophus having a smooth, rounded outline.
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| 19. | The male portion of the reproductive tract contains the vas deferens and the epiphallus . " Arion " slugs lack a penis.
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| 20. | Male copulatory organs are generally reduced, their role being taken over by a well-developed atrium and the epiphallus that produces spermatophores.
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