Sipuncula

species classification - University of Michigan Museum of Zoology

ITIS - taxonomy and nomenclatural information - Integrated Taxonomic Information System

taxonomic hierarchy - The Taxonomicon

IRMNG genera list

overview, lab exercise, part of online Invertebrate Anatomy course

overview, lab exercise, part of online Invertebrate Anatomy course

Tree of Life

MBL Woods Hole

UCMP Berkeley exhibit

list based on information in Cutler 1994 The Sipuncula, their systematics, biology, and evolution