cloacal fold

cloacal fold

a slight elevation located just lateral to the cloacal membrane early in the fifth week of embryonic development. Cloacal folds later divide into urogenital folds and anal folds.
References in periodicals archive ?
6 times the interorbital distance; (7) first finger equal or slightly longer than second; (8) disc on third finger more than 3/5 size of tympanum; (9) keels on fingers absent; (10) third finger not swollen in male; (11) short thick cloacal fold, with entire free border; (12) tarsal fold distinct, raised, not ending in tubercle; (13) inner metatarsal tubercle oval, about 2.
Cloacal opening at midlevel of thighs, covered by a cloacal fold with an entire free border; thighs smooth, without tubercles; length of tibia about 47% the snout-to-vent distance; ventral and dorsal sides of tibiae smooth; tarsal fold conspicuous, elevated, not ending in tubercle; tarsal fold located towards half distal portion of tarsum, aligned with dermal keel coming alongside border of first toe, although separated by the metatarsal inner tubercle; inner metatarsal tubercle ovoid, approximately three times longer than wide and 2.
6 times wider than adjacent phalanx; (7) fingers with thick lateral fringes; thickened edge along outer edge of fourth finger, from base of pad to close to outer metacarpal tubercle; (8) cloacal fold short; (9) tarsal fold strong, not ending in tubercle but having a little distal enlargement; (10) foot-web formula: I2.