The leucocytozoids of ten families of Passeriformes - Estrildidae, Fringillidae, Laniidae, Nectariniidae, Passeridae, Ploceidae, Promeropidae, Pycnonotidae, Sturnidae and Zosteropidae-are reviewed.
Leucocytozoon roubaudi from the Estrildidae, L. fringillinarum from the Fringillidae, L. balmorali from the Laniidae, L. gentili from the Passeridae, L. bouffardi from the Ploceidae, L. brimonti from the Pycnonotidae and L. zosteropis from the Zosteropidae are re-described. Leucocytozoon dutoiti, L. nectariniae, L. deswardti, L. pycnonoti and L. sturni are new species described from the Fringillidae (Carduelinae), Nectariniidae, Promeropidae, Pycnonotidae and Sturnidae respectively while L. monardi is considered
to be a synonym of L. gentili and L. molpastis is considered to be a synonym of L. brimonti.
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