portrait

Description:

Vannella (van-ell-a) a fan shaped naked amoeba, made distinctive by the broad anterior margin (right) and extensive hyaline region. Nucleus located to centre bottom of cell, uroid (posterior end) is to the left. Phase contrast. Material from Nymph Creek and Nymph Lake, thermal sites in Yellowstone National Park, photograph by Kathy Sheehan and David Patterson.