Sturisoma nigrirostrum is a species of armored catfish endemic to Peru where it occurs in the Ucayali River basin. This species inhabits gently to swiftly flowing white waters where submerged wood is abundant in the main flow of rivers. This species grows to a length of . Sexual dimorphism includes hypertrophied odontodes on the sides of the head of the male. References Sturisoma Fish of South America Freshwater fish of Peru Fish described in 1940