Keywords: FMIB 40813 Trichosphaerium sieboldi.jpeg Trichosphaerium sieboldi Subject Protozoa Trichosphaerium Tag Invertebrates 1902 Cite book Marine Protozoa from Woods Hole Calkins Gary N Washington DC Government Printing Office 1902 Bulletin of the United States Fish Commission vol 21 1901 Fig 3 Creator Gary Nathan Calkins PD-UWASH-FMIB Institution University of Washington FMIB-source accession number 40813 Images from the Freshwater and Marine Image Bank to check Gary Nathan Calkins Trichosphaerium sieboldi |