As the name suggests, a dark-spined plant, with attractive brown or yellowish-brown spines usually sticking out from the slightly glossy, violet-toned body, reddish brown wool on the areoles, and darkish red flowers with white styles and spreading yellowish anthers.

The description is here.

Plants of this species in the collection include:

Aylostera fulviseta

Aylostera fulviseta HJ578

Aylostera fulviseta RH223

Aylostera fulviseta RH1042

Aylostera fulviseta WR319

Aylostera fulviseta WR583