The first description as
Eriocereus spinosissimus by
Albert Frederik Hendrik Buining and Arnold J. Brederoo was published in 1977 from Buining's estate. The specific epithet
spinosissimus is derived from the superlative of the Latin adjective
spinosus for 'thorny'. Friedrich Ritter placed the species in the genus
Arthrocereus in 1979. ==References==