Xu, K.; Agatha, S.; Dolan, J. (2024). World Ciliophora Database. Ptychocylis drygalskii Brandt, 1896. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=427508 on 2024-07-30
additional sourceHada, Y. (1932). Report of the biological survey of Mutsu Bay. 24. The pelagic Ciliata, suborder Tintinnoinea. <em>Science Reports of the Tohoku Imperial University, Fourth Series, Biology.</em> 7(4): 553-573.[details] Available for editors [request]
Present Present in aphia/obis/gbif/idigbio Inaccurate Introduced: alien Containing type locality