The robust skink, Oligosoma alani (formerly Cyclodina alani), is a large, rare species of skink endemic to New Zealand. This species was once widespread throughout the North Island but has been wiped out in most parts of its former range by predation from several species of introduced rats - it now occurs naturally only on 6 small islands off the north-eastern coast of the North Island. The specific epithet for this animal was given by the describer in honour of his nephew, Alan Robb.