A pseudoscorpion, also known as a false scorpion or book scorpion, is an arachnid belonging to the order Pseudoscorpiones, also known as Pseudoscorpionida or Chelonethida.
At the end of each Major League Baseball season, the league leaders of various statistical categories are announced. Leading either the American League or the National League in a particular category is referred to as a title.
Tridenchthoniidae is a family of pseudoscorpions within the superfamily Chthonioidea. The family comprises one fossil and 15 recent genera, containing 70 species:
The Sclerosomatidae are a family of harvestmen with about 1,300 known species.
The Sternophoridae are a family of pseudoscorpions with about 20 described species in three genera. While Afrosternophorus is an Old World genus, found mainly in Australasia, the other two genera are found in the New World, from El Salvador to the southern USA and in the Dominican Republic.
Joseph Conrad Chamberlin was an American arachnologist who studied mainly pseudoscorpions. A native of Utah, he studied primarily at Stanford University while working most of his career in Oregon for the U.S. Department of Agriculture. Several species are named in his honor.
The Menthidae are a small family of pseudoscorpions that are nevertheless spread around the world. While Menthus is found from Mexico to California, Oligomenthus lives in South America. The monotypic genera Paramenthus and Thenmus live in Israel and Australia, respectively.
Chthoniidae is a family of pseudoscorpions within the superfamily Chthonioidea. The family contains more than 600 species in about 30 genera. Three fossil species are known from Baltic and Dominican amber.
Tridenchthonius is a genus of pseudoscorpions in the family Tridenchthoniidae. There are about 16 described species in Tridenchthonius.
The Chernetidae are a family of pseudoscorpions with over 650 described species and 110 genera.
Olpiidae is a family of pseudoscorpions in the superfamily Garypoidea. It contains the following genera:
Neobisium is a genus of pseudoscorpions in the family Neobisiidae.
Garypus is a genus of pseudoscorpions in the family Garypidae. There are at least 20 described species in Garypus.
Cheliferidae is a family of pseudoscorpions in the order Pseudoscorpiones. There are at least 60 genera and 270 described species in Cheliferidae.
Syarinidae is a family of pseudoscorpions in the order Pseudoscorpiones. There are at least 20 genera and 110 described species in Syarinidae.
Microbisium is a genus of pseudoscorpions in the family Neobisiidae. There are about 12 described species in Microbisium.
Hesperochernes is a genus of pseudoscorpions in the family of Chernetidae.
Chitrella is a genus of pseudoscorpions in the family of Syarinidae.
