 The number of moults varies, both between species and sexes, but generally will be between five times and nine times before the spider reaches maturity.Not surprisingly, since males are generally smaller than females, the males of many species mature faster and do not undergo ecdysis as many times as the females before maturing.Members of the Mygalomorphae are very long-lived, sometimes 20 years or more; they moult annually even after they mature.