Amastigote

Amastigote is an intracellular "replicative" form of a parasite. It is a round/oval shaped cell without any protruding flagellum. Amastigotes replicate inside the infected tissue cells (of vertebrate host) by binary fission and transform into trypomastigotes.

expected_location::mammalian cells.Seen in seen_in::Leishmania sp and in seen_in::Trypanosoma cruzi.

Reference:

1) http://dna.kdna.ucla.edu/parasite_course-old/Default.aspx