Thelocactus vaskoanus J. J. Halda L. Hovorka et V. Zatloukal, Acta Mus. Richnov. Sect. natur. 7: 75 (2000).
Descriptio: a T. tulensis similis sed clavatus, aciculispinus, parvi-albiflorus, parviseminus.
Stem cylindrical-clavate, up to 400mm tall; spines thin, acicular, ca 10mm long; flowers tiny (ca 20mm long and 15mm across), white with greenish stripes outside; seeds much smaller than those of T. tulensis.
Holotypus: PR no. ZV10223, leg. Zdenek Vaško 20. 10. 2000.
Patria et Distributio: Mexico centralis: San Luis Potosi (in vicinitate pagi Rio Verde) in summo collis, solo calcareo ad 1200 m supra mare.
