original description
(of Didemnum trivolutum Millar, 1960) Millar, R. H. (1960). Ascidiacea. <em>'Discovery' Rep. Cambridge.</em> 30: 159. [details] Available for editors 
context source (Deepsea)
Intergovernmental Oceanographic Commission (IOC) of UNESCO. The Ocean Biogeographic Information System (OBIS), available online at http://www.iobis.org/ [details]
basis of record
Clarke, Andrew; Johnston, Nadine M. (2003). Antarctic marine benthic diversity. <em>Oceanography and Marine Biology: an Annual Review.</em> 41: 47-114. (look up in IMIS) [details] Available for editors 
additional source
Monniot, C.; Monniot, F. (1983). Ascidies antarctiques et subantarctiques: morphologie et biogéographie. <em>Mémoires du Museum national d'Histoire naturelle.</em> 125, A, 1-168. [details] Available for editors 
additional source
van der Land, J. (ed). (2008). UNESCO-IOC Register of Marine Organisms (URMO). , available online at http://www.marinespecies.org/urmo/ [details]
From editor or global species database
Genetic nomenclature abbreviation Psytri [details]