It differs from other members of the genus in its design of the epigyne, which has a wide pocket and short copulatory openings.

[1] The female holotype had been collected in 1911 by Jean Roux and Karl Friedrich Sarasin, and it is the latter that is commemorated in the species name.

[1] Small and slender, it has a shape that is typical of the genus, with a wide cephalothorax, thinner abdomen, very large chelicerae and very long endites.

The epigyne has short copulatory openings unlike Rhondes atypicus but a similarly shallow and wide pocket.

[9] Rhondes sarasini has only been found in one location, in the forests of Vallie Ngoué towards the south end of Grande Terre, New Caledonia.