Species of Sciadicleithrum (Dactylogyridae : Ancyrocephalinae) of cichlid fishes from southeastern Mexico and guatemala : New morphological data and host and geographical records

A survey of species of Scitrtlicleithrnrn (Monogenea: Dactylogyridae) from the gills of cichlid fishes from the Yucatan Peninsula of Mexico and neighboring regions is provided. Sciadicleithrrrm mexicanum Kritsky, Vidal-Martinez, and Rodriguez-Canul is reported from Cichlasomtr urophthalmus (type host), Cichlasoma au- reum, and Petenia splenrlitln (new host records) from Mexico, and Cichlasoma trimacultrrum from Guatemala (new host and geographical record); Sciadirleithrum bravohollisae Kritsky, Vidal-Martinez. and Rodriguez-Canul from Cichlasoma getldesi, Cidrltrsonw lentiginosum, Cichlasoma managuense, Cichlasoma sah~ini, and Ciclr- lasomc! sp. (all new host records); Sciudicleithrum splendidae Kritsky, Vidal-Martinez, and Rodriguez-Canul from Cichlasorna friedrich.stahli and C. managuense (new host records); and Sciadicleithrum meekii Mendoza- Franco, Scholz, and Vidal-Martinez from Cichlasoma callolepis, Cichlasoma helleri, and C. managuense (new host records) from Mexico. Data on morphological and biometrical variability of individual species from different hosts are provided. Species of Sciadirleithrrinr from Mexico and Guatemala exhibit wide host specificity. The present records expand distributional areas of all of the species of Sciadicleithrum studied.