Concerning the Eratigena atrica group - which stage is shown and which filaments are produced by the different spinnerets?

15 March 2018 1 4K Report

Image 1 and 2 show the juvenile spider from a dorsal and ventral view. What is the stage? Is it sub-sub-adult? length 7mm.

Image 3 shows the the 3x2 different spinnerets. What are the functions meaning which filaments are produced?

Max Aubry

Dear Viktoria,

Does the 7mm measurement corresponds to the body length only, legs not included ? In general, a picture with scale is preferable.

I think it would be hard to give the exact stage of this juvenile, but the size corresponds approximately to one of the later instars, and it's not adult nor sub-adult, hence sub-sub-adult is probable.

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