Holcaspis bathanae
was first found on the dry tussock-shrubland slopes of Mt St Bathans in northwestern Central Otago. 40years later a second population was found in southern Mackenzie basin 50 kms away at Quailburn on the Diadem Range. These ranges are aligned and are separated by only 2-3 kms of the Ahuriri Valley. The Ahuriri valley is not known to be a barrier to any flightless insect.