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Using a specialized appendage near his mouth called a pedipalp, the male spider reached forward and carefully slid a packet of sperm into the female’s abdominal cavity.

The males who are able to wrap the females’ legs have more successful copulations, as measured by the number of insertions of the pedipalp, which delivers sperm to the female.

The scans revealed that the L. jeskovi pedipalp grasps and twists the scapus as the male dismounts, snipping it off as if with scissors.

To test the strength of the adhesive, the researchers used a fine glass pipette tip with a microscopic glass bead at the end to pull a single sticky pedipalp hair.

They pulled the pedipalp back at different speeds and recorded the deflection of the pipette tip on video.