Note the two flat planes of the prepectus, with the upper section in the same plane as the region of the mesopleuron posterior (to the right) of the episternal sulcus.

Note too the absence of a ridge at the junction of the planes. That is, there is no sign of an epicnemial carina. This is the condition in the vast majority of Australian Podagritus species.

photographer: Kristy Hoath; Museums Victoria https://collections.museumsvictoria.com.au/specimens/1013432

There can be no question that this is Rhopalum, as it is the holotype of a species described by Leclercq (1957). Yet in this image the prepectus looks angular … simply due to the light reflecting of the front surface.

photographer: Kristy Hoath; Museums Victoria https://collections.museumsvictoria.com.au/specimens/1013430