The two Australian species currently placed in Helinomydaea do not conform strictly to the genus, lacking strong presutural acrostichals and ventral setae on wing vein R4+5, but have been placed there apparently on the similarities of the female terminalia as mentioned by Vockeroth (1972, pp. 60-61) when describing the genus. Both species were originally placed in Helina when described by Malloch (1922, 1924), and will key to this genus following Couri (2010).
