These are the undescribed endemic NZ spiders that I have found so far.

It's amazing (and a little sad) how many new and undescribed spiders there are in New Zealand.

As an enthusiastic amateur, I'm hoping to find a way to help with this. Building my skills in the meantime.

From the incredibly helpful Spiders of New Zealand: Annotated Family Key & Species List by @corvink

Genus Tetragnatha: "...Tetragnathidae are badly in need of taxonomic attention, as most species were described more than a century ago and can hardly be recognised. Additionally, 9 undescribed species are suspected to occur in New Zealand..."

Genus Uliodon: "...Zoropsidae are badly in need of taxonomic attention... The three known species are not recognisable based on published descriptions... Another 40 undescribed species are suspected... and may represent several distinct genera. The males of Uliodon albopunctatus and Uliodon cervinus are undescribed."