Indo-West Pacific Pycnogonida collected by some major oceanographic expeditions

Seventy-six species of Pycnogonida, and some unidentifiable forms, belonging to 25 genera in all 8 families, of which 13 species are new to science, are recorded from the Indo-West Pacific region. New species are described in the genera Ascorhynchus, Ammothella, Achelia, Pantopipetta, Nymphon, Callipallene, Phoxichilidium, Anoplodactyhis, and Pycnogonum. A phylogenetic hierarchy of the families of extant Pycnogonida is presented.