Pycnogonida

included taxa and references - Tree of Life

IRMNG genera list

genome size - Animal Genome Size Database

genome size - Animal Genome Size Database

genome size - Animal Genome Size Database

Pycnogonida World Database

species account, range, biology, ecology, distribution and endangerment - AmphibiaWeb

overview, lab exercise, part of online Invertebrate Anatomy course

online pdf article, Invertebrate Zoology

online interactive identification key - Zoological Museum, University of Amsterdam