Rebutia (Aylostera) yuquinensis was first described by Walter Rausch in Kakteen und andere Sukkulenten 31(10): p. 307, 1980, the journal of the Deutsche Kakteen-Gesellschaft.

Here is the text of the description in Latin as published, together with my own English translation below. You should look up the original for more details in German and a colour photograph.

Rebutia (Digitorebutia) yuquinensis RAUSCH spec. nov.

Walter Rausch

Simplex, raro proliferans, globosa ad brevicylindrica, perglauca, radice rapiformi ; costis recte adscendentibus, ad 12, sulcis transversis in gibberes 4 mm longos divisis; areolis ovalibus, 2 mm longis, dilute fusco-tomentosis; aculeis marginalibus 3-4 paribus et 1 deorsum, raro 1 sursum directo, ad 5 mm longis, accumbentibus, paulum subulatis, flavidis ad fuscis, basi incrassata obscurioribus; aculeo centrali 0.

Floribus 30 mm longis et 25 mm diametientibus; ovario et receptaculo albido-roseo, squamis fuscis et pilis albis tecto; phyllis perigonii exterioribus lanceolatis, violaceo-roseis, medio-fusco-striatis; phyllis perigonii interioribus spathulatorotundis, ad 8 mm latis, ruberrimis, micantibus; fauce 14 mm longa, 5 mm eius cum stylo connata, rosea; filamentis violaceo-roseis, superne aurantiacis, stylo et stigmatibus (5) viridibus. Fructu seminibusque Digitorebutiae modo.

Patria: Bolivia, Cinti meridionalis, Yuquina, 3200 m alt.

Typus: Rausch 632, depositus in Herbario Collectionis Plantarum Succulentarum Municipali Turicensi, Helvetia.

English translation

Rebutia (Digitorebutia) yuquinensis RAUSCH spec. nov.

Single, rarely branching, spherical or short cylindrical, glaucous, tap-rooted; up to 12 ribs, straight, crossed by transverse grooves separating tubercles 4mm long; areoles oval, 2mm long, with a little brown wool; 3 – 4 pairs of marginal spines and one pointing downwards, rarely one upwards, up to 5mm long, lying flat, a little awl-shaped, yellowish to brown, with a dark thickened base; no central spines.

Flowers 30mm long and 25mm wide; ovary and receptacle whitish-pink, with dark scales and white bristles; outer petals lanceolate, violet-pink, with a dark central stripe; inner petals spatulate-round, up to 8mm wide, red, pearlescent; throat pink, 14mm long, style fused to tube by 5mm; stamens violet-pink, upper part orange, style and stigmas (5) green.

Fruit as for other Digitorebutias.

Habitat : Yuquina, Sud-Cinti, Bolivia, at 3,200m altitude.

Type: Rausch 632, deposited in the Herbarium of the Municipal Succulent Plant Collection in Zurich, Switzerland.