Bonthainia celebensis, a species of harvestman (arachnid) belonging to the Bonthainia genus
Caddo Banks, 1892 (eastern North America, Japan)
Ethobunus foliatus, Goodnight & Goodnight, 1983, a harvestman species in the genus Ethobunus and the family Zalmoxidae found in Costa Rica
Mosfora silvestrii, Roewer, 1925, a harvestman species in the genus Mosfora and the family Epedanidae found in Funkiko
Another cause of concern was the unique ecology of the canyon, which included endemic species such as Banksula melones, the Melones cave harvestman.
Taracus silvestrii, Roewer, 1930, a harvestman species in the genus Taracus and the family Sabaconidae living in caves in the United States