I received a letter from Dr Lau last December in which he stated that he has now described this species in the US Journal as M. antesbergeriana (sorry I do not know which issue). Lau stated that the species is nothing sensational, but is definitely new, a green plant with no exciting spination and has white flowers with a purple centre stripe.
The location is the Zacatecas - Durango border area. It could have a remote relationship with M.wagneriana.
By Bob Stanley
From "The Journal of the Mammillaria Society" - Vol.30 n.3 - August 1990
Mammillaria antesbergeriana LAU 1163
LAU 1163 - Canoas - Durango - Mexico
From Chris Davies collection - Chinnor - U.K.
Mammillaria antesbergeriana LAU 1163
LAU 1163 - Canoas - Durango - Mexico
From Antonio Gandolfo collection - Vicenza