It is the only species in the genus Trogloarctus, which is part of the family Coronarctidae.

[2] They were first found in 1996 in an underwater cave near La Ciotat in the Bouches-du-Rhône department, southern France.

The genus name Trogloarctus is a combination of the Greek words troglodytes ("cave dweller") and arktos ("bear").

The specific name trionyches is also Greek: tria ("three") and onych- ("claw").

[2] Data related to Trogloarctus trionyches at Wikispecies