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- Yoshimura, Jin, et al. Show all 5 Authors
- Journal of insect physiology 2017 v.100 pp. 1-8
- Polygonia c-aureum; adults; butterflies; environmental factors; imagos; insect physiology; invertebrates; overwintering; spermatocytes; spermatogenesis; spermatogonia; spermatozoa; testes
- ... Sperm polymorphism is widely known in invertebrates. In insects, Lepidoptera has two types of sperm: nucleated eupyrene (fertile) sperm and anucleated apyrene (unfertile) sperm. These sperm types are produced during post-embryogenesis, and eupyrene spermatogenesis precedes apyrene spermatogenesis. During overwintering, spermatogenesis stops and a portion of undifferentiated-stage spermatocytes deg ...