One of the mysteries of the English language finally explained.
Each of the paired male reproductive organs in snakes and lizards.
- ‘Despite these anatomical differences, amniote penises and hemipenes share some basic similarities: they are all more or less cylindrical, and they are all hydrostatic.’
- ‘Our studies on gartersnakes (Thamnophis sirtalis parietalis) reveal significant morphological asymmetry in this system: testes, kidneys, and hemipenes on the right-hand-side of the body are larger than those on the left.’
- ‘Sharks do have paired structures for injecting sperm, called hemipenes.’
- ‘We sexed each snake by probing its cloaca to detect the presence of hemipenes.’
- ‘Sex was determined by everting the hemipenes of males.’
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