Two new Middle Miocene spatangoids (Echinoidea) from the Murray Basin, South Australia
62(1): 91-99 (2005)
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Two new spatangoid taxa are described from the Glenforslan Formation cropping out in the Murray River cliffs near Blanchetown, South Australia. One taxon, Murraypneustes biannulatus gen. et sp. nov., a large species of spatangoid with two ‘peripetalous’ fascioles (one circling the margin and the other close to the distal end of the relatively short petals), two distinct sizes of aboral primary tubercles, and a depressed apical system. The other spatangoid described, Spatagobrissus dermodyorum sp. nov. differs from the only other fossil species of this genus recorded from Australia, S. laubei (Duncan, 1877), in having a much shorter labrum, markedly larger peristome and periproct and larger primary tubercles within the peripetalous fasciole.
Keywords: Echinoidea, Spatangoida, Murrraypneustes, Spatagobrissus, new taxa, Middle Miocene, South Australia