Three new species of Urocleidoides (Monogenoidea: Dactylogyridae) parasitizing characiforms (Actinopterygii: Characiformes) in Tocantins River, states of Tocantins and Maranhão, and new record for U. triangulus in Guandu River, state of Rio de Janeiro, Brazil


	Scheme of measurements of the sclerotized structures of the haptor and male copulatory organ (MCO) of Urocleidoides spp.: (1) anchor: (a) base, (b) total length; (2) ventral bar: (a) length, (b) medial projection; (3) dorsal bar: (a) length.

Part of: de Freitas ÁJ.B, Bezerra CA.M, Meneses YC, Justo MCN, Viana DC, Cohen SC (2021) Three new species of Urocleidoides (Monogenoidea: Dactylogyridae) parasitizing characiforms (Actinopterygii: Characiformes) in Tocantins River, states of Tocantins and Maranhão, and new record for U. triangulus in Guandu River, state of Rio de Janeiro, Brazil. Zoologia 38: 1-11. https://doi.org/10.3897/zoologia.38.e65001