Pachyrhamma acanthoceras, also known as the Auckland cave wētā, is a large species of cave wētā endemic to New Zealand.

It is distributed in the upper North Island, from Northland to Taranaki. This species is known to be present in old water-works tunnels in the Waitākere Ranges, west of Auckland.

Large groups of individuals can be found in the tunnels, but there is no known social life. These wētā are flightless and nocturnal.

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