Reproduction can be costly and is predicted to trade-off against other characters. However, while these trade-offs are well documented for females, there has been less focus on aspects of male ...

The intimate act of copulation is old – very old. In fact, it first evolved in ancient armoured placoderm fishes called antiarchs 385 million years ago. Fossils of the antiarch Microbrachius dicki ...

A male (left) and a female (right) of Neotrogla curvata during copulation. The female penis is highlighted in red. Its cashew nut-shaped tip is sclerotized while the basis is inflatable and acts as an ...

The diel copulation periodicity of the mosquito, Aedes aegypti (L.) (Diptera: Culicidae) at indoor and outdoor sites in Trinidad, West Indies ...