Showing posts with label palps. Show all posts
Showing posts with label palps. Show all posts

Sunday, 15 November 2015

Wandering male lace weavers

In the last week I have found two different males Amaurobius similis wandering, one in the porch and the other in the house. Note the different abdominal pattern in the photos below, especially the dark blotches surrounding the cardiac mark (the midline elongated area over the abdomen). In this species, mature males are most likely to be found between September and November, and they abandon their webs in search of the female retreats. I released them both after taking their photo paying especial attention to the palp (above), which is diagnostic and separates this species from the similar one A. fenestralis. Males A. similis have an inward pointing, curved sharp projection on its palp, which in A. fenestralis is thicker and blunt.
Male 10/11/15.
Male 15/11/15.

Thursday, 14 August 2014

A glimpse of Zygiella mating

 By chance while in the garden a couple of days ago, I spotted two small spiders near each other, which immediately attracted my attention. The smaller spider, which I could now see it was a male, proceeded to approach the passive female and insert one of his palps in her epigyne. After a few seconds, he retreated and repeated the process with the other palp. The translucent inflated palp is just visible in the photo above, where the female is on the right. A gust of wind separated the spiders and, despite the male's apparent efforts to find her partner, thus ended their affair. The female now rested atop a flower stem and I could watch and identify her by the pale leaf pattern on her back and ringed legs: a missing sector orb web spider, Zygiella x-notata.
 Given how slow spider courtship may be, in particular the slow initial male's approach to an often aggressive female, I count myself lucky to have witnessed the mating of yet another spider in the garden.
The female Zygiella x-notata