Chelicerata Heymons, 1901
   Opiliones Sundevall, 1833 - harvestmen
     Suborder †Tetrophthalmi Garwood, Sharma, Dunlop & Giribet, 2014
       1 Genus †Eophalangium Dunlop, Anderson, Kerp & Hass, 2004
       2 Genus †Hastocularis Garwood, Sharma, Dunlop & Giribet, 2014