|MadSci Network: Zoology|
True daddy-long-legs are members of the arachnid order Opiliones (or Phalangida). When immature and still molting, spiders (arachnid order Araneae) generally can regenerate their legs (although they may be smaller -depending on how many molts they have to go through to reach maturity). Once they reach maturity after their last molt lost legs are not regenerated. However, according to Barnes(1987)and apparently unlike spiders, true daddy-long-legs cannot regenerate lost legs. Reference: Barnes, R. D. 1987. Invertebrate Zoology, 5th ed. Saunders College Publishing, Philadelphia.
Try the links in the MadSci Library for more information on Zoology.