Hadopyrgus is a genus of white or transparent freshwater snails found only in New Zealand. They are micromolluscs, just a few millimetres long, in the gastropodfamilyTateidae.[1][2]Hadopyrgus species are subterranean – living in caves, underground aquifers, or deep in river gravels – and so were named from the Greekhades (underworld) and pyrgos (tower).[3] They can have quite restricted ranges: Hadopyrgus ngataana, for example, has been found in just one pool, in a stream flowing through a single cave.[4]
^Haase, Martin (2008). "The radiation of hydrobiid gastropods in New Zealand: A revision including the description of new species based on morphology and mtDNA sequence information". Systematics and Biodiversity. 6 (1): 99–159. doi:10.1017/S1477200007002630. S2CID83722003.