First description by Thomas Linzen in Mitteilungsblatt des Arbeitskreis für Mammillarienfreunde 3/2005 134-145.
Body: Single, sometimes branching, depressed globose to almost globose, 4 - 8 cm in diameter and 3 - 8 cm high. Shiny dark green.
Roots: Thick, pulpous.
Sap: With watery sap.
Tubercule: Short cylindrical to conical, truncated top, 1,5 to 2 cm long, 0,8 to 1,2 cm in diameter. Spreading laterally somewhat compressed.
Axil: Naked .
Radial spine: (7) 9 - 11, thin, acicular, needle like, with darkbrown tip. Almost radiating horizontally, white-yellowish, later becoming greyish, 6 - 16 mm long.
Central spine: Absent.
Flower: Funnel form, 4 - 5 cm long and 4 - 6 cm in diameter. Sulphur yellow.
Fruit: Globose to little oval, 6 - 8 mm in diameter and about 9 mm long, dark green, later becoming green yellowish.
Seed:Drop-shaped, 2,0 - 2,3 mm long; 1,5 - 1,8 mm wide, black. Basal to subbasal
Habitat Substrate: On meadows with flat, strongly weather beaten lime rocks, in holes and sheltered by grass and moss.
Geographic Distribution: Mexico, San Luis Potosi near Mpio, Guadalcazar and Realejo.
Comments: Differs from the other species of dolichothele by having only radial spines, rounded form of the buds, building two rows of inner petals, globose fruits, the biggest seed in this group and a very rainy habitat separated from the other species of this series
Bibliography: AfM 3/2005


photo: W. Hellinx