Pseudoscorpions, also known as false scorpions or book scorpions, are small, scorpion-like arachnids belonging to the order Pseudoscorpiones, also known as Pseudoscorpionida or Chelonethida.
The Opiliones are an order of arachnids colloquially known as harvestmen, harvesters, harvest spiders, or daddy longlegs. As of April 2017, over 6,650 species of harvestmen have been discovered worldwide, although the total number of extant species may exceed 10,000. The order Opiliones includes five suborders: Cyphophthalmi, Eupnoi, Dyspnoi, Laniatores, and Tetrophthalmi, which were named in 2014.
Pirate spiders, members of the family Mimetidae, are araneomorph spiders which typically feed on other spiders.
The Chthonioidea are a superfamily of pseudoscorpions, representing the earliest diverging and most primitive living pseudoscorpions. The superfamily contains two families.
Cyphophthalmi is a suborder of harvestmen, colloquially known as mite harvestmen. Cyphophthalmi comprises 36 genera, and more than two hundred described species. The six families are currently grouped into three infraorders: the Boreophthalmi, Scopulophthalmi, and Sternophthalmi.
The Sironidae are a family of harvestmen with more than 30 described species.
Troglosironidae is a family of harvestmen with seventeen described species in a single genus, Troglosiro, which is found on the island of New Caledonia, in the Pacific Ocean.
The Neogoveidae are a family of harvestmen with 27 described species in eight genera. However, eight species of Huitaca, 17 species of Metagovea and 12 species of Neogovea are currently awaiting description.
The Stylocellidae are a family of harvestmen with about 30 described species, all of which occur from India to New Guinea. Members of this family are from one to seven millimeters long. While Stylocellus species have eyes, these are absent in the other two genera.
The Pettalidae are a family of harvestmen with 75 described species in 10 genera. Several undescribed species are known or assumed in some genera.
Ischyropsalididae is a family of harvestmen with 31 described species in 3 genera, found in Europe and North America.
Taracus is a genus of harvestman, or Opiliones, typically found living in limestone and lava caves in the United States. They grow to a size of 2.0–5.5 mm (0.08–0.22 in).
Gonzalo Giribet is a Spanish-American invertebrate zoologist and Alexander Agassiz Professor of zoology working on systematics and biogeography at the Museum of Comparative Zoology in Harvard University. He is a past president of the International Society for Invertebrate Morphology, of the Willi Hennig Society, and vice-president of the Sociedad Española de Malacología.
Huitaca or Xubchasgagua was a rebelling goddess in the religion of the Muisca. The Muisca and their confederation were a civilization who inhabited the Altiplano Cundiboyacense in the Andes. Huitaca has been described by the chroniclers Juan de Castellanos in his Elegías de varones ilustres de Indias, Lucas Fernández de Piedrahita and Pedro Simón.
Huitaca boyacaensis is a species of neotropical harvestmen in the family Neogoveidae, first described by Ligia Benavides and Gonzalo Giribet in 2013.
Siro is a genus of mite harvestmen in the family Sironidae. There are at least 20 described species in Siro.
Anansi is a genus of African pirate spiders first described by L. R. Benavides, G. Giribet & Gustavo Hormiga in 2017. It is named after Anansi, a trickster god of Akan folklore. As of April 2019 it contains only three species.
Paramiopsalis is a genus of harvestmen belonging to the family Sironidae.
The centipedes or Chilopoda are divided into five orders, which are grouped into two subclasses, Pleurostigmomorpha and Notostigmomorpha, the latter of which comprises only one order, the Scutigeromorpha.
