original description
Zelinka, C. (1907). Zur Kenntnis der Echinoderen. <em>Zoologischer Anzeiger.</em> 32(5): 130-136. [details]
From editor or global species database
Etymology [The genus name was derived from Greek τραχύς trāchýs, rough, uneven, rugged, and from Greek δῆμος dēmos, population, a common suffix in Trachydemidae, and probably referred to the large and clumsy appearance of the first species described, Trachydemus giganteus.] [details]