Macrocystella mariei (Callaway) XXXXX N.B. THIS ITEM IS NOW RESERVED FOR P..V .PLEASE DO NOT TRY TO BUY IT XXXXXXX
Cystoids were primitive Echinoderms with a stalk, calyx and arms. . Piece of dark grey shale with at least 10 individuals all lying in a line. Beautiful preservation and fine surface detail under magnification. This is the first time ever I have seen multiple Cystoids preserved in this manner.
Lower Ordovician, Tremadoc Series.
Amnodd Bwll near Arenig Mountain, North Wales.
Specimen : 9.3 x 5.2 cm.
