Phil Tration's picture

What is this appendage?

Observed: 22nd September 2013 By: Phil TrationPhil Tration’s reputation in Invertebrates
Garden Spider: Araneus diadematus

I have noticed this phallic-like appendage on several specimens of this species when I look at my photos but I cannot find any reference to it. I thought the male transferred a packet of sperm to the female's epigynum with his palps.

Species interactions

No interactions present.


JonathanWallace's picture

The epigyne of Araneus

The epigyne of Araneus species has a long tongue-like appendage or scape and this is what your image shows. The form of the epigyne is an important diagnostic feature in the identification of spiders.

Jonathan Wallace

Phil Tration's picture

Epigyne of Araneus

Thanks very much for your reply.