Plagiorchis vicentei, sp.n. is described from the small intestine of the lizard, Hemidactylus mabouia (Moreau de Jonnès, 1818), from Teresópolis, Rio de Janeiro, Brasil. The new species differs from P. didelphidis (Parona, 1896) by the smaller size of body, by the presence of spinous tegument and ventral sucker smaller than oral sucker; from P. parumbursaitus Freitas & Dobbin Jr., 1961 by the smaller size of body and suckers and the bigger size of eggs; from P. rangeli Artigas & Zerpa, 1961 by the bigger size of suckers and eggs; and front P. freitasi Vicente, 1978 by the smaller size of body, by the bigger size of eggs and by the different position of gonads that in the new species are close to the ventral sucker.
Trematoda; Plagiorchis; Lacertilia; Hemidactylus; Brazil