Arias S., Sánchez-Martínez E., Una especie nueva de Strombocactus (Cactaceae) del río Moctezuma, Querétaro, México, Revista Mexicana de Biodiversidad, 2010, 81(3):619-624, doi: 10.22201/ib.20078706e.2010.003.633
The original description of S. corregidorae from the Moctezuma canyon, with information on type material, habitat, roots, spines, flowers, fruits and seeds. The comparison and key distinguish the new species and both S. disciformis subspecies. The traits described include persistent thick spines, yellow flowers and seeds without an appendage.