Thelocactus

Familia: Cactaceae
Subfamilia: Cactoideae
Tribus: Cacteae
Genus: Thelocactus
Species: T. bicolor – T. buekii – T. conothelos – T. hastifer – T. hexaedrophorus – T. lausseri – T. leucacanthus – T. macdowellii – T. × mirandus – T. multicephalus – T. rinconensis – T. setispinus – T. tepelmemensis – T. tulensis

• Thelocactus (K.Schum.) Britton & Rose, Bull. Torrey Bot. Club 49: 251 (1922).
  • Type species: Thelocactus hexaedrophorus Britton & Rose

• Basionym
  • Echinocactus subg. Thelocactus K.Schum., Gesamtbeschr. Kakt. 292, 429 (1898).

• Homotypic
  • Thelocactus sect. Hexaedrophori Kladiwa & Fittkau in Krainz, Die Kakteen (61): CVIIIb: [3] (1975), nom. inval.
  • Thelomastus Frič, in Kreuz., Verzeichnis Amer. Sukk. Rev. Syst. Kakteen 10 (1935), nom. illeg.

• Heterotypic
  • Thelocactus sect. Bicolores Kladiwa & Fittkau in Krainz, Die Kakteen (61): CVIIIb: [3] (1975), nom. inval.
    • Type species: Thelocactus bicolor (Galeotti ex Pfeiff.) Britton & Rose
  • Hamatocactus Britton & Rose
  • Torreycactus Doweld

• Britton, N.L. & Rose, J.N. 1922. The Cactaceae. Descriptions and Illustrations of Plants of the Cactus Family. Vol. 3. 255 pp. + 23 pl. Carnegie Institution of Washington. BHL PDF Reference page. : 49: 251.
• Korotkova, N., Aquino, D., Arias, S., Eggli, U., Franck, A. , Gómez-Hinostrosa, C., Guerrero, P.C., Hernández, H.M., Kohlbecker, A., Köhler, M., Luther, K., Majure, L.C., Müller, A., Metzing, D., Nyffeler, R., Sánchez, D., Schlumpberger, B. & Berendsohn, W.G. 2021. Cactaceae at Caryophyllales. org–a dynamic online species-level taxonomic backbone for the family. Willdenowia 51(2): 251–270. DOI: 10.3372/wi.51.51208   Reference page. 

• Korotkova, N. et al. 2021. Thelocactus in Cactaceae at Caryophyllales.org. A global synthesis of species diversity in the angiosperm order Caryophyllales. Published online. Accessed: 2021 Nov 25. Reference page. 
• Govaerts, R. et al. 2021. Thelocactus in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2021 Mar 28. Reference page. 
• International Plant Names Index. 2021. Thelocactus. Published online. Accessed: Mar 28 2021.
• Tropicos.org 2021. Thelocactus. Missouri Botanical Garden. Published online. Accessed: 28 Mar 2021.
• Hassler, M. 2021. Thelocactus. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. 2021. Species 2000 & ITIS Catalogue of Life. Published online. Accessed: 2021 Mar 28. Reference page.