Ariadna bellatoria is a species of tube-dwelling spider endemic to New Zealand.
This species was described in 1917 by Raymond Dalmas from a single female specimen collected in Taumaranui.
This speciesis only known from Taumaranui, New Zealand.
Under the New Zealand Threat Classification System, this species is listed as "Naturally Uncommon" with the qualifiers of "Data Poor: Size" and "Data Poor: Trend".