Ariamnes attenuatus Rhomphaea urquharti is a species of cobweb spider that is endemic to New Zealand.

[1] This species was described as Ariamnes attenuatus in 1887 by Elizabeth Bryant from male and female specimens.

[2] The male is recorded at 2.8mm in length whereas the female is 5mm.

The abdomen is brown and mottled silver.

[1] Under the New Zealand Threat Classification System, this species is listed as "Data Deficient" with the qualifiers of "Data Poor: Size", "Data Poor: Trend" and "One Location".