The Collaborative International Dictionary of English v.0.48:

Pseudofilaria \Pseu`do*fi*la"ri*a\, n.; pl. Pseudofilari?.
   [NL. See Pseudo-, and Filaria.] (Zool.)
   One of the two elongated vibratile young formed by fission of
   the embryo during the development of certain Gregarin[ae].
   [1913 Webster]