From Williams et al., 2017:

[Neogippslandia, Özdikmen, 2009, p. 235.

Name illegitimate — nomenclatural senior synonym: Gippslandia, which has the same type. Özdikmen (2009, p.235) considered Gippslandia Stover and Williams, 1987 to be illegitimate because it is a junior homonym of Gippslandia Bayly and Arnott 1969; however, Gippslandia Bayly and Arnott is an animal and under the I.C.N. it does not pre-empt Gippslandia Stover and Williams.

Type species: Deflandrea extensa, Stover, 1974 (pl.5, figs.4a–c)] ; Gippslandia extensa, Stover and Williams, 1987