2 NEW SPECIES OF ZELLERIELA (OPALINIDA, OPALINIDAE), ENDOCOMENSAL IN LEPTODEIRA-SEPTENTRIONALIS (REPTILIA, COLUBRIDAE) FROM NUEVO-LEON, MEXICO

Two new species of the genus Zelleriella from the intestine of Leptodeira septentrionalis from the state of Nuevo Leon, Mexico are described: Z. pineyroi n. sp., oval, asimetrical, with a convex and a parallel side (CL = 81-124, XBAR = 107-mu-m; CW = 60-91, XBAR = 78-mu-m) the nuclei are located in tandem on the main axis, and with a diameter off 16-22 (XBAR = 19-mu-m); and Z. tijerinidae n. sp., wich is caracterized by havind an elliptical shape with a pointed anterior extremity and rounded posterior extremity (CL = 72-140, XBAR = 94-mu-m), the maximum width just beneath the equatorial axis (CW = 46-91, XBAR = 63-mu-m), and two sphaerical nuclei with a diameter of 11-18-mu-m (XBAR = 14 m) situated in a diagonal plane. The geographical distribution of Zelleriella bayonai Galaviz et Jimenez, 1986 is extended from Guatemala, C.A. to Northeastern Mexico.