Robertsonidra praecipua is recorded from the Great Barrier Reef, Australia. The illustration on this site is the type specimen from Heron Island, Australia.
SEM's generously supplied by Ann-Margret Amui, Research Institute Senckenberg.
Original description: Robertsonidra praecipua Hayward & Ryland 1995.
Locality: Heron Island, GBR, Qld Australia.
Type specimen: QM G304955
Description from Hayward & Ryland, 1995.
Description from Tilbrook, 2006. (PDF file)