Xolotrema
Xolotrema is a genus (or subgenus under "Triodopsis") of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Polygyridae. Shell description. Pilsbry (1940) characterized the shell of "Xolotrema" (which he considered to be a subgenus) thus: ""Triodopses", in which the inner margin of the basal lip has a long bladelike lamella, terminating at a notch where it joins the outer arc of the lip; the embryonic whorls are covered with close retractive radial striae (subobsolete in "T. fosteri")." Species. Species within the genus "Xolotrema" include: