Robert A. Budington
Abstract
1. Planaria maculata, and probably many other triclad Turbellaria, mate with both copulants oriented in the same manner. 2. Impregnation is mutual, and simultaneous. 3. During copulation the vasa deferentia are much distended by their sperm contents, while the uterus may act temporarily as a sperm receptacle only.
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1. Planaria maculata, and probably many other triclad Turbellaria, mate with both copulants oriented in the same manner. 2. Impregnation is mutual, and simultaneous. 3. During copulation the vasa deferentia are much distended by their sperm contents, while the uterus may act temporarily as a sperm receptacle only.
Key concepts: Planaria, Turbellaria, Biology, Flatworm, Receptacle, Sperm, Anatomy, Zoology