Limb specialization is not confined to the crustaceans. We find it throughout the arthropod lineage. Here are some examples:
![louse](https://evolution.berkeley.edu/wp-content/uploads/2021/05/louse.jpg)
![centipede head](https://evolution.berkeley.edu/wp-content/uploads/2021/05/centipede_head.jpg)
![spider in a web](https://evolution.berkeley.edu/wp-content/uploads/2021/05/spider.jpg)
![water strider](https://evolution.berkeley.edu/wp-content/uploads/2021/05/waterstrider.jpg)
Grasshopper photo provided by Robert Potts © California Academy of Sciences; Bee photo provided by Scott Camazine; Louse image © Vince Smith; Centipede head photo provided by Chao Jui-lung; Spider photo provided by Dr. Lloyd Glenn Ingles © California Academy of Sciences; Water strider photo provided byGiff Beaton
Arthropods have developed mouthparts that were once legs. Learn more at Extreme adaptations: Eating with your feet.