Pelecyphora emskoetteriana (Quehl) D.Aquino & Dan. Sanchez comb. nov.

Mammillaria emskoetteriana ≡ Mammillaria emskoetteriana Quehl, Monatsschr. Kakteenk. 20: 139. 1910. Coryphantha emskoetteriana (Quehl) A.Berger, Kakteen: 339. 1929. Escobaria emskoetteriana (Quehl) Borg, Cacti: 304. 1937. Neobesseya emskoetteriana (Quehl) Lodé, Cact.-Avent. Int. 98(Suppl.): 6. 2013. Type: México, San Luis Potosí, raised in Germany from seed received from San Luís Potosí, R. Emsköttter s. n. (lectotype, designated here: US [2767373 image! = Monatsschr. Kakteenk.: 139. 1910. Illustration " Mamillaria Emskötteriana Quehl. Nach einer von Herrn Emil Weddy in Halleaufgenommenen Photographie]). Notes. The photograph published in the protologue is considered part of the original material and is designated here as a lectotype (Quehl 1910). A specimen deposited in the US herbarium (2767373!) consists of a duplicate of the original photograph mounted on the sheet. The label indicates it was designated as a lectotype by A. Zimmerman, but it was not published. Here, we formalize this proposal.

Escobaria bella = Escobaria bella Britton & Rose, Cactaceae 4: 56. 1923. Coryphantha bella (Britton & Rose) Fosberg, Bull. S. Calif. Acad. Sci. 30: 58. 1931. Type. United States, Texas, on hills of Devil’s River, 16 Oct 1913, J. N. Rose & W. Ficht 17991 (lectotype, designated by Benson, Cacti U. S. Canada: 963. 1982: US [1821125 image!]).

Escobaria runyonii = Escobaria runyonii Britton & Rose, Cactaceae 4: 55. 1923. Mammillaria escobaria Cory, Rhodora 38: 405. 1936. nom. nov. Type. United States, Texas, Rio Grande city, 10 Aug 1921, R. Runyon s.n. (lectotype, designated by Benson, Cacti U. S. Canada: 964. 1982: US [not numbered]).

Coryphantha roberti = Coryphantha roberti A.Berger, Kakteen: 280. 1929. Type. United States, Texas, vom Río Grande, Type: not preserved.

Coryphantha muehlbaueriana = Coryphantha muehlbaueriana Boed., Monatsschr. Deutsch. Kakteen-Ges. 2: 18. 1930. Escobaria muehlbaueriana (Boed.) F.M.Knuth, Kaktus-ABC: 380. 1936. Neobesseya muehlbaueriana (Boed.) Boed., Mammill.-Vergl.-Schluessel: 15. 1933. Type. México, Tamaulipas, bei Jaumave, 1929, F. Viereck s.n. (lectotype, designated here, Monatsschr. Deutsch. Kakteen-Ges.: 18. 1930a: Illustration " Coryphantha muehlbaueriana Boed. sp. nov. Nat. Gr.").