Desertas wolf spiders

I was watching a programme about a wildlife park. They showed two Desertas Wolf Spiders, a species that is critically endangered so they are hoping the pair would breed. They had already mated and the male had lost a leg in the process. The females are very maternal and the egg sac is made of silk and attached to her so she can carry it around and protect it. When the spiderlings hatch they climb on her back and she carries them until they are old enough to fend for themselves. 

Jane