[1] Micranthocereus dolichospermaticus features a bluish columnar shoot that can reach up to 2 meters in height and 8 centimeters in diameter.

It has about 30 slightly humpbacked ribs, with oval areoles covered in bright brown wool.

The plant has 6 to 8 straight, protruding central spines that are yellowish and turn gray with age, reaching up to 2.5 centimeters long.

[2] Micranthocereus dolichospermaticus is found in the Brazilian state of Bahia, specifically around Bom Jesus de Lapa.

Originally described as Austrocephalocereus dolichospermaticus in 1974 by Albert Frederik Hendrik Buining and Arnold J. Brederoo, the species was renamed by Friedrich Ritter in 1979.