They are marine arthropods in the class Pycnogonida and are called pycnogonids ... all the way through their long legs. What is the Largest Species of Sea Spider? Although there is much we ...

The doubtfully-related Pycnogonida and Tardigrada are omitted, but the Linguatulid are included. There is no mention of Limulus. Thus the book is, in effect, the third ‘biology of spiders’ to ...