Novogenuata is a clade of the arachnid subclass Dromopoda including the Scorpiones, Pseudoscorpiones and Solifugae and is considered by Shultz (1990) the sister group of the Opiliones. A clade is a term belonging to the discipline of cladistics. ... Orders Acarina Amblypygi Araneae Opiliones Palpigradi Pseudoscorpionida Ricinulei Schizomida Scorpiones Solifugae Uropygi The arachnids, Arachnida, are a class of invertebrate animals in the subphylum Chelicerata. ... A scorpion is an invertebrate animal with eight legs belonging to the order Scorpiones in the class Arachnida. ... Superfamilies Chthonioidea Neobisioidea Garypoidea Cheiridioidea Feaelloidea Cheliferoidea A pseudoscorpion, (also known as a false scorpion or book scorpion), is an arachnid belonging to the order Pseudoscorpionida, also known as Pseudoscorpiones or Chelonethida. ... A Solifugid The order Solifugae is a group of arachnids, containing around 900 species. ... The Phalangids (legacy name) or Opiliones (better known as harvestmen) are eight-legged invertebrate animals belonging to the order Opiliones in the class Arachnida, in the subphylum Chelicerata of the phylum Arthropoda. ...