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Click on the images to view movies of these testate amoebae

  MVI_1389  A live testate (shelled) amoeba, Hyalosphenia papilio with flagellate associates/endosymbionts inside the test moving around fast. We don't yet know what type of flagellate this is, and have never before seen live amoebae with flagellates inside... The flagellates appear to be trapped (or happily) inside the test. All amoeba with associated flagellates in tests were found in one sample from Acadia National Park in August 2012.
  MVI_1411 Here is another Hyalosphenia papilio this one is actively moving with a psuedopod extended outside of the test. Two flagellates are visible inside the test.
papilio and elegans Two 'morphospecies' of Hyaposphenia - H. elegans and H. papilio - can be genetically identical. Here, H. elegans (smaller amoeba) and H. papilio (larger amoeba) appear to be having sex. We hypothesize that these morphospecies are actually examples of sexual dimorphism.
papilio and elegans More evidence of sex between H. elegan and H. papilio.
  MVI_1409 This is a Nebela sp. with many flagellates inside the test. Aperture (opening) again appears to be blocked. 
  MVI_1408 Nebela tincta with amoebae pushed up against aperture appears to be blocking exit. Numerous flagellates inside.
flagellate   Hyalosphenia papilio with visible pseudopods. One flagellate is visible inside.
 flagellate Nebela collaris with multiple flagellates inside test.
flagellates Nebela tincta with two flagellates.
 testate Nebella sp. dividing - visible cytoplasm streaming from mother to daughter cell.