Marilyna n. gen. is proposed for three Australian pufferfish species, M. pleurosticta (Gunther), M. meraukensis (de Beaufort), and M. darwinii (Castelnau). M. meraukensis is recorded extensively from Australia for the first time, and M. darwinii, long ignored by ichtyalogists is confirmed as a valid, applicable name.
Marilyna is characterised by a broad, heavily built body, eyes set below the dorsal profile, nasal organ with two openings, eye rim completely adnate, a large olfactory foramen in each prefrontal, and a deep caudal peduncle.
Reicheltia n. gen. is proposed for the single species R. halsteadi (Whitley). It differs from Marilyna in the lighter built, narrower body, eyes interrupting the dorsal profile, a small olfactory foramen in each prefrontal, and a shallow caudal peduncle.