Dictyna cornigera Dictyna nigella Dictyna decolora Arangina nigella Arangina cornigera is a species of Dictynidae spider that is endemic to New Zealand.

[1] This species was described as "Dictyna cornigera" and "Dictyna nigella" in 1917 by Raymond Comte de Dalmas from female and male specimens collected in Canterbury.

[1] The holotype is stored in the National Museum of Natural History, France.

The cephalothorax is sooty brown, almost black and is covered in a patch of white hairs.

[1] Under the New Zealand Threat Classification System, this species is listed as "Not Threatened".