[1] It is a member of the New Zealand endemic genus Algidia in the opilionid (harvestman) family Triaenonychidae.

The type specimen of A. chiltoni is held at the Natural History Museum, London,[2] while the type of Adaeum hoggi and both of Forster's subspecies are held at Te Papa..[3][4][5] Forster redescribed this species in 1954 and observed that while his description was in accord with Roewer's, he had doubts about Roewer's choice of type specimen as it was collected from Canterbury and he himself never saw any South Island specimens from there.

These are thicker in A. c. chiltoni than in the other two subspecies, with A. c. longispinosa having fewer tubercles on the rear margin of the scutum and the first two free tergites than A. c.

[2] The femur of the male pedipalp has a proximo-dorsal (upper surface, near the body) swelling with a spinous tubercle similar to A. c. longispinosa, but not present in A. c. oconnori.

[2] Algiidia chiltoni has not been assessed under the New Zealand Threat Classification System.