Thelyssa callisto is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae.WoRMS (2013). Thelyssa callisto Bayer, 1971. Retrieved through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=492417 on 2013-06-10Intergovernmental Oceanographic Commission (IOC) of UNESCO. The Ocean Biogeographic Information System (OBIS)
References
External links Biodiversity Heritage Library (1 publication) Encyclopedia of Life USNM Invertebrate Zoology Mollusca Collection World Register of Marine Species