Echinofossulocactus vanderaeyi var. ignotus-longispinus Lawr. in Gard. Mag. (London) 17: 318. 1841 Echinofossulocactus vanderaeyi var. ignotus-longispinus Lawr. in Gard. Mag. (London) 17: 318. 1841Taxon for this nameEchinofossulocactus vanderaeyi var. ignotus-longispinus Lawr.