Tidarren is a genus of spiders. The males are much smaller than females.

The males of this genus amputate one of their palps before maturation and enter their adult life with one palp only. It is assumed that this is done to increase mobility, as the palps are disproportionately large compared to the size of the body.

In the Yemen

Yemen

The Republic of Yemen , commonly known as Yemen , is a country located in the Middle East, occupying the southwestern to southern end of the Arabian Peninsula. It is bordered by Saudi Arabia to the north, the Red Sea to the west, and Oman to the east....

i species Tidarren argo, the remaining palp is then torn off by the female. Spider males use their palp to transfer semen into the female. The separated palp remains attached to the female's epigynum for about four hours and apparently continues to function independently. In the meantime the female feeds on the palpless male.

Species

Tidarren Chamberlin & Ivie, 1934

• Tidarren argo Knoflach & van Harten, 2001 (Yemen)
• Tidarren chevalieri (Berland, 1936) (Canary Is., Cape Verde Is.)
• Tidarren cuneolatum (Tullgren, 1910) (Central, East Africa, Yemen)
• Tidarren haemorrhoidale (Bertkau, 1880) (USA to Argentina)
• Tidarren levii Schmidt, 1957 (Congo)
• Tidarren mixtum (O. P.-Cambridge, 1896) (Mexico to Costa Rica)
• Tidarren sisyphoides
  Tidarren sisyphoides
  Tidarren sisyphoides is a spider of the family Theridiidae .The male of this species is only 1% the size of the female. At copulation, the male dies during insertion and remains attached to the female for more than two hours. However, the female does not eat her mate. The dead male is afterwards...
  
  (Walckenaer, 1842) (USA to Colombia, West Indies)