Aylostera (Rebutia (Digitorebutia)) carmeniana was first described by Walter Rausch in Kakteen und andere Sukkulenten 29(5): 105-106, 1978, the journal of the Deutsche Kakteen-Gesellschaft.

Here is the text of the description of this species in the original Latin, but you should look up the original description for more details, including further details in German and photographs. The English translation below is my own.

Rebutia (Digitorebutia) carmeniana RAUSCH spec.nov.

Walter Rausch

Globosa, 15 mm diametiens, griseo-violacea, radice napiformi carnosa; costis 11-13, recte adscendentibus vel paulum tortis, in gibberes 3 mm longos verrucosus divisis; areolis ovalibus, 2 mm longis, albo-tomentosis; aculeis marginalibus 14-16, ad 6 mm longis, accumbentibus ad radiantibus; aculeo centrali 0 – 1, ad 5 mm longo; aculeis omnibus vitreo-albis, basi incrassata fuscis. Floribus 15 mm longis et 12 mm diametientibus, ovario et receptaculo violaceo fusco, squamis atroviridibus, pilis et setis albis tecto; phyllis perigonia exterioribus viridulis, obscurius acuminatis; phyllis perigonii interioribus spathulate-rotundis, sanguineis; fauce 6 mm longa, dimidio manubrii modo connata, deinde crateriformiter se expandente, rosea; filamentis fusco-roseis, stylo validiore, 12 mm longo, 3 mm eius cum receptaculo connato, viridi , stigmatibus 5, viridibus. Fructu globoso, 5 mm diametiente, atro-fusco, squamis dilute-fuscis, pilis et setis albis tecto. Seminibus globoso-oblongis, 1 mm longis, testa nigra verrucosa et hilo albido volvato, subobliquo.

Patria: Argentina, Jujuy, prope Caspalá, 3100 m alt.

Typus: Rausch 690, depositus in Herbario Collectionis Plantarum Succulentarum Municipali Turicensi, Helvetia.

English translation

Rebutia (Digitorebutia) carmeniana RAUSCH spec.nov.

Walter Rausch

Body spherical, 15 mm diameter, grey-violet, with a fleshy tap root, ribs 11-13, straight ascending or slightly twisted, divided into 3 mm long tubercles, areoles oval, 2 mm long, white tomentose, radial spines 14-16 to 6 mm long, parallel to spreading, central spines 0-1, up to 5 mm long, all spines glassy-white with a thickened, brown base.
Flower 15 mm long and 12 mm across, ovary and tube purple-brown with dark green scales, white hair and bristles, outer petals greenish with a darker tip, inner petals spatulate – round, blood-red, throat 6 mm long, half of it a fused narrow tube and then a cup-shaped opening, pink, stamens brown-pink, style stronger, 12 mm long, of which 3 mm fused with the tube, green, stigmas 5, green.
Fruit spherical, 5 mm diameter, black-brown with light brown scales, white hair and bristles, seeds spherical-oblong, 1 mm long, with black, warty testa and whitish, bulging, somewhat crooked navel.
Habitat: Argentina, Jujuy, near Caspalá at 3100 m.
Type: Rausch 690, deposited in the Herbarium of the Municipal Succulent Collection, Zurich, Switzerland.