Disc subcircular with broadly rounded apices; anterior margin of disc weakly to moderately concave; snout pointed; tail narrow-based, subcircular in cross-setion, slender, whip-like beyond sting; a very broad median denticle band from well before interorbit, extending along centre of disc and onto upper tail; pearl thorn (more prominet in young) on back, preceded and followed by a few slightly enlarged thorns; no thorns or skin folds on tail. Body colour uniformly brownish (greenish brown centrally) dorsally; ventral surface white with darker margins in young, becoming almost entirely dark, with occasional white patches in adults.