sentences:  The pelvic fins are small and low with an angular shape; in adult males their inner margins are fused to form a subtle "apron" over the claspers.The anal fin is roughly triangular; its base measures 11% of the total length, exceeding the distance between the pelvic and anal fins but not the distance between the dorsal fins.The caudal fin is short and low, with a small but obvious lower lobe and a ventral notch near the tip of the upper lobe.