TREMATODOS DE LAS TORTUGAS DE MEXICO. III. DESCRIPCION DE UN NUEVO GENERO DE LA SUBFAMILIA CLADORCHINAE Fischoeder, 1901 Y REDESCRIPCION DE DERMATEMYTREMA TRIFOLIATA Price, 1937

Resumen

The author found in the large intestine of two turtles the following Trematoda: Choanophorus rovirosai Caballero, 1942; Octangioides tlacotalpensis Caballero, 1942; Dermatemytrema trifoliata Price, 1937 and Parachiorchis parviacetabulatus, n.g., n. sp.
The inmature forms of Choanophorus rovirosai observad showed the atrial appendixes invaginated, the excretory apparatus not entering into them and the reproductory organs were located further behind than in the adult specimens.
The eggs of Octangioides tlacotalpensis which had not been observed before, show an even shell, white, and enclose a vermiform ebryo.
Twenty years after Dermatemytrema trifoliata was first described, it was found for the second time and its description enlarged.
Parachiorchis parviacetabulatus is described as a new genus a nd a new species of Paramphistomoidea characterized, principaly, by a terminal small acetabulum; post-bifurcal sexual pore; muscular cirrus pouch; lobulated and remified testicles and extracaecal vitellaria.