Atypus piceus

Atypus piceus is a mygalomorph spider of the family Atypidae. It occurs in Europe to Moldavia, and Iran and is the type species of the genus "Atypus".
Description.
Males are about long without chelicerae, females up to . Males are of a deep black, while spiderlings and females are dark brown with a violet hue. The very long posterior spinnerets consist of three segments, the last segment features a light blot, which is helpful in identifying the species. "A. piceus" can live for more than 10 years.
Habits.
Adults live in up to deep tubes with a diameter of about 10 mm. The silken lining continues above ground for about , where it is camouflaged with matter from the vicinity. The mating period is from June to July, when the males search for females. The spiderlings hatch during autumn and overwinter in the mother's burrow without feeding. After emerging in spring, they climb nearby plants and use strands of silk to fly away (ballooning).
Evolutionary relationship.
"Atypus piceus" is possibly the result of hybridisation of "A. affinis" and "A. muralis". "A. muralis" has posterior spinnerets with four segments, "A. affinis" with three, and "A. piceus" has three, but the white blot could be result of this hybridisation.