TREMATODOS DE LOS MURCIELAGOS DE MEXICO. III.- DESCRIPCION DE UROTREMA SCABRIDUM Braun, 1900, Y POSICION SISTEMATICA DE LAS ESPECIES NORTEAMERICANAS DE ESTE GENERO

Resumen

The post-mortem study of 30 bats of the groups Natalus mexicanus Miller and Tardarida brasiliensis Geoffroy, captured in the Convent of Acolman, State of Hidalgo, and in the Xictli Cave in Tlalpan, D. F. Mexico, yielded 15 specimens of a Trematoda Urotrema scabridum Braun, 1900, found in the small intestine.
Our specimens were compared one of Urotrema shillingeri Price, kindly loaned to us by Dr. Penner and with the original german and english descriptions Urotrema scabridum Braun, 1900; U. shillingeri Price, Chandler and Penner; U. lasiurensis, Alicata, 1932; U. minuta and Urotrematulum attenuatum Macy, 1933. From this study we come to the conclusion that the North-American species are synonymous to Urotrema scabridum Braun, 1900. Chandler and Penner had arrived to similar conclusiones in an incomplete way when they considered U. lasiurensis and U. minuta as synonym of U. shillingeri. Furthermore, Chandler hinted that when more specimens of U. scabridum were obtained for study it might be considered as equal to U. shillingeri in
its North American forma because the only differences were about the size of the suckers and the size of the eggs, data which is cleared with our observations and those of Penner about the size of the eggs.
Therefore there are only two valid species for the genus Urotrema estabilisihed by Braun in 1900: Urotrema scabridum and U. wardi Pérez Vigueras, 1940, the latter found in the intestine of a Reptile Anolis porcatus in Cuba.