2004 Ebbighausen et al., p.134, Meyendorff's and Conrad's locality in Sahara-Algeria,
 table-mountain Gara el Kahla, 35 km SW of Timimoun, co-ordinates 29 ° 05,675 ',
W 00 ° 02,370', at two localities from a  2-3 m thick interval in the middle portion  of an
approx. 50 m thick claystone package within the Grès supérieurs de Kahla
(Conrad 1984: 131, fig.21).