The black dwarf porcupine, also known as Koopman's porcupine (Coendou nycthemera), is a porcupine species from the New World porcupine family endemic to northern Brazil. It occurs in the Amazon rainforest east of the Madeira River and south of the Amazon River. It inhabits primary forest and possibly second growth. It was described as Coendou koopmani by Charles O. Handley Jr. and Ronald H. Pine in 1992, but was subsequently found to be identical to a species described in 1818. It is nocturnal and herbivorous. References Natureserve.org Coendou Rodents of South America Mammals of Brazil Endemic fauna of Brazil Mammals described in 1818 Taxa named by Ignaz von Olfers