Novafroneta gladiatrix is a species of sheet weaver spider endemic to New Zealand.
This species was described in 1979 by A.D Blest from male and female specimens. The holotype is stored in Otago Museum.
The male is recorded at 4.33mm in length whereas the female is 4.34mm. This species has a brown cephalothorax and legs. The abdomen is grey with pale markings.
This species is known from throughout New Zealand.
Under the New Zealand Threat Classification System, this species is listed as "Naturally Uncommon" with the qualifier of "Biologically Sparse".