Tetragnatha nigricans is a species of Tetragnathidae spider that is endemic to New Zealand.[1]
This species was described in 1917 by Raymond Comte de Dalmas from a female specimen collected in Whanganui.
The female is recorded at 5mm in length.
This species is only known from Whanganui, New Zealand.
Under the New Zealand Threat Classification System, this species is listed as "Data Deficient" with the qualifiers of "Data Poor: Size" and "Data Poor: Trend".[2]