The first report of a new locality for Pelecyphora strobiliformis in the state of San Luis Potosi, Mexico, was published by the authors in 2000. Later they found other localities that required significant modification to the overall distribution and the conservation status of the species. The taxon is located to the north of the state, in the municipalities of Catorce, Cedral and Vanegas; on hills with calcareous soils, of sedimentary origin, slope of 0 to 25%, altitude of 1780 to 2140 m; dry temperate climate and xerophytic vegetation. The spatial distribution is in colonies or patches. The area of geographical distribution is 800 km²; the area occupied by the colonies is considered to be 0.225 km², with a population from 2 to 3 million mature plants. The seedlings are covered by gravels. The negative impacts do not affect this taxon directly. The conservation status, applying the Mexican Norma Official approaches and those of the IUCN at regional level, are classified as: Not Threatened and Least Concern (L/C) for the state of San Luis Potosí.