- NRCC, University of Texas Medical Branch, Phillip Lee, and James B. Wood; Biology Department, Dalhousie University, Cartiona L. Day and Ronald K. O'Dor., CephBase (European data). National Resource Center for Cephalopods (NRCC), 11 Aug 2004, Galveston, Texas., more
- Gnathostomulida checklist for ERMS 2.0, more
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