Rebutia (Aylostera) huasiensis was first described by Walter Rausch in Kakteen und andere Sukkulenten 28(2): pp. 25-26, 1977, the journal of the Deutsche Kakteen-Gesellschaft.

Here is the description in Latin as published, followed by an English translation which is my own. You should look up the original for more details including a photograph and further notes in German.

Rebutia (Aylostera) huasiensis RAUSCH spec. nov.

Walter Rausch

Simplex, globosa, ad 30 mm diametiens, obscure-glauca, radice rapiformi carnosa; costis ca. 13, spiraliter tortis, in gibberes ca. 4 mm longos et latos, rotundos divisis; areolis ovalibus, 2 mm longis, albo-tomentosis; aculeis marginalibus 7—9, radiantibus ad accumbentibus, 3-5 mm longis, tenuibus, basi incrassatis, fuscis, obscurius acuminatis, postea canescentibus; aculeo centrali 0.

Floribus 30 mm longis et 35 mm diametientibus; ovario et receptaculo viridi , squamis viridibus, pilis et setis albis tecto; phyllis perigonii exterioribus lanceolatis, viridibus et roseo-albido-marginatis; phyllis perigonii interioribus spathulate-rotundis et serratis, rubris; fauce albido-rosea, filamentis roseis et sursum albidis, stylo (dimidio longitudinis cum receptaculo connato) et stigmatibus (6-8) viridibus.

Fructu globoso, 6 mm diametiente, rubro-fusco, squamis viridibus, pilis longis et setis albis tecto; sarcocarpio lilacino-roseo. Seminibus Aylosterae typo, paulum maioribus et tunica arillosa reliqua tectis.

Patria: Bolivia, Cinti, prope Inca Huasi, 3.300 m alt.

Typus: Rausch 313, depositus in Herbario Collectionis Plantarum Succulentarum Municipali Turicensi, Helvetia.

English translation

Rebutia (Aylostera) huasiensis RAUSCH spec. nov.

Simple, spherical, up to 30mm diameter, faintly glaucous, fleshy tap rooted, ca. 13 ribs, arranged spirally in tubercles ca. 4mm long and wide, round divided; areoles oval, 2mm long, with white wool; 7 – 9 marginal spines, radiating to lying flat, 3 -5mm long, thin, thicker at the base, brown, darker at the tip, later greyish-white; no central spines.

Flowers 30mm long and 35mm diameter; ovary and receptacle green with green scales and covered with white bristles; outer petals lanceolate, green with pale pink margins; inner petals spatulate-rounded and serrated, red; throat pale pink, anthers pink with upper part white; style (half connected to the receptacle) and stigmas (6 – 8) green.

Fruit spherical, 6mm diameter, red-brown, green scales, long hairs and covered in white bristles; flesh lilac – pink. Seeds typical of Aylostera, a little larger; seed coat with remains of aril attached.

Habitat: Bolivia, Cinti, near Inca Huasi, 3,300m altitude.

Type: Rausch 313, deposited in the Herbarium of the Municipal Succulent Plant Collection of Zurich, Switzerland.