This study describes the basic morphology and structure of the dermal denticle from Trygonorrhina dumerilii, and assesses its utility as an ageing structure for rhinobatids. No banding patterns were identified on the surface or in sections of enlarged dermal denticles, which
may indicate that these structures are not suitable for estimating age in rhinobatids.
In 2004, the South Australian Museum and the Royal Society of South Australia became partners in Southern Scientific Press. This led to the amalgamation of their two professional journals. The Transactions of the Royal Society of South Australia now incorporates the Records of the South Australian Museum. Transactions of the Royal Society of South Australia deals with natural history relating to South Australia