REDESCRIPCION DE DOS TREMATODOS DIGENEOS DE PECES DEL PACIFICO MEXICANO

Resumen

Two species of Digenetic Trematodes of fishes from Mexican Pacific Ocean are redescribed in this paper: Hamacreadium lariosi (Caballero, 1946), with a new host and locality records are registred, and Pseudocreadium scaphosomum Manter, 1940; in same host but a new locality record.
The first species is parasitic in Lutjanus guttatus from Manzanillo, Col., Mexico and it's similar to the species described by Dr. E. Caballero y C. in 1946 located in a "Mero", fish not identificated, from Salina Cruz in Oaxaca State, Mexico, but this is different, in that the Cirrus pouche and Metraterm don't cross and don't exist
male and female pores, but a genital atrium little noted, that is open to the genital pore, which is find at the level of the aesophagus and at the righ of the middle line, this differences are considered to be specific variations due probably to the parasit contraction in the fixation moment.
The second species correspond to the described specimens by Dr. H. W. Manter in 1940; found in the Verrunculus polylepis fish, for me from Kino Bay in Sonora State, Baja California Gulf, Mexico, but it is different from this, for the smaller size of the body, for the not lobed ovary, but ovoide and the eggs are bigger the dimension are 0.060 to 0.093 mm. long by 0.033 to 0.064 mm. wide; this are considered only specific variations.
Finaly I propose a new name: Hamacreadium nagatyi n. comb., in honor at our colleague from Cairo for your notable labor in the Helminthology for the species described for he, how Hamacreadinm lethrini Nagaty, 1962 although, such name there have given first for Yamaguti in 1934.