Theridion longicrure is a species of Theridiidae that is endemic to New Zealand.
This species was described by Brian John Marples in 1956 from a male specimen.
The male is recorded at 2.78mm in length.
This species is only known from Great Island in Three Kings Islands, New Zealand.
Under the New Zealand Threat Classification System, this species is listed as "Naturally Uncommon" with the qualifiers of "Island Endemic" and "Range Restricted".