Cid del Prado Vera Ignacio. 2009. Three new species of nematodes from Los Tuxtlas reserve area, Veracruz, Mexico. Order Tylenchida, Criconematidae (Nemata). Nematropica 39:187-197. Three species of criconematid nematodes were found in tropical forest soils and corn fields in Los Tuxtlas, State of Veracruz, México. The new species of are described: Criconemoides rafaeloi sp.n., characterized by a lip region with four large submedian lobes connected dorsally and ventrally and a vulva that does not open widely; Mesocriconema lamothei sp.n., characterized by small separate rounded submedian lobes and by a slightly prominent labial disc, a vulva that is open with two projections on the anterior lip and a slightly curved vagina; and Neolobocriconema argumedoi sp.n., which is characterized by ornamentation of all the body annules with acute small teeth, by the number of serrate body annules (43-45), the small body size 0.41-0.55 mm, the presence of a single crenate annuli in the cephalic region and the conical tail with acute terminal lobes.