The described male has a yellowish-white abdomen with small and large dark brown areas.
The described male has tufts of white hairs on the abdomen. The described female has a greater amount of dark brown on the abdomen.
In the described male Eriauchenus milloti, the anterior median eyes stand on a large bulge. A small downward-pointing spine occurs near the base of each long chelicera, at 0.30 mm in the male and 0.33 mm in the female. Their chelicerae measured 1.81 and 1.89 mm respectively, adding small-scale features to the spider’s elevated head-and-jaw outline.
The 2018 study also records juveniles. On 25 December 2008, one was collected at 100 metres elevation in rainforest beside a stream, surrounded by disturbed slash-and-burn forest at Andohahela. It was extracted from sifted leaf litter using a mini-Winkler method. Alongside adult specimens used for description, this record links a specific juvenile microhabitat with its surrounding landscape.
An extinction-risk assessment has not been added yet.
At Andohahela, where this species has been recorded, FAPBM identifies slash-and-burn agriculture, bush fires and illegal selective logging among conservation pressures. The fund describes collaborative management involving local residents through park and protected-area support committees, linking conservation with community participation.