Pallifera marmorea Pilsbry, 1948
External: Pale brown body becoming lighter on the sides well above ventral edge; light gray spots forming eight longitudinal lines on anterior 2/3 on mantle; blackish posterior end of mantle and posterior tail tip; head and tail not fully covered by mantle in contracted condition; diagonal pneumostome groove; gray-white head, body below the mantle, and sole; pointed tail (Branson 1968).
Internal: A few ribs in center of jaw; yubular penis with bulbous apex; four short, fleshy folds on side of interior penis apex, and longitudinal ribs in the rest of the penis; rounded spermatheca with a narrower duct than that of P. dorsalis and a smooth interior (Pilsbry 1948; Branson 1968).
Similar to P. fosteri but without anterior hump; with smaller spots, with mantle color ending higher above the foot edge, diagonal rather than straight pneumostome groove, and pointed rather than blunt tail (Branson 1968).