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.
Chalcid wasps are insects within the superfamily Chalcidoidea, part of the order Hymenoptera. The superfamily contains some 22,500 known species, and an estimated total diversity of more than 500,000 species, meaning the vast majority have yet to be discovered and described. The name "chalcid" is often confused with the name "chalcidid", though the latter refers strictly to one constituent family, the Chalcididae, rather than the superfamily as a whole; accordingly, most recent publications (e.g.,) use the name "chalcidoid" when referring to members of the superfamily.
The Acrididae are the predominant family of grasshoppers, comprising some 10,000 of the 11,000 species of the entire suborder Caelifera. The Acrididae are best known because all locusts are of the Acrididae. The subfamily Oedipodinae is sometimes classified as a distinct family Oedipodidae in the superfamily Acridoidea. Acrididae grasshoppers are characterized by relatively short and stout antennae, and tympana on the side of the first abdominal segment.
The Ariidae or ariid catfish are a family of catfish that mainly live in marine waters with many freshwater and brackish water species. They are found worldwide in tropical to warm temperate zones. The family includes about 143 species.
Choreutidae, or metalmark moths, are a family of insects in the lepidopteran order whose relationships have been long disputed. It was placed previously in the superfamily Yponomeutoidea in family Glyphipterigidae and in superfamily Sesioidea. It is now considered to represent its own superfamily. The relationship of the family to the other lineages in the group "Apoditrysia" need a new assessment, especially with new molecular data.
Mesostigmata is an order of mites belonging to the Parasitiformes. They are by far the largest group of Parasitiformes, with over 8,000 species in 130 families. Mesostigmata includes parasitic as well as free-living and predatory forms. They can be recognized by the single pair of spiracles positioned laterally on the body.
Lechytia is a genus of pseudoscorpions in the subfamily Lechytiinae within the family Chthoniidae. It is the sole genus in its subfamily and contains 22 described species from many parts of the world.
Chthoniidae is a family of pseudoscorpions within the superfamily Chthonioidea. The family contains more than 600 species in about 30 genera. Fossil species are known from Baltic, Dominican, and Burmese amber. Chthoniidae now includes the former families Tridenchthoniidae, and Lechytiidae which has been demoted to subfamilies.
P. silvestrii may refer to:
Anisoditha is a genus of pseudoscorpions in the family Chthoniidae. There is at least one described species in Anisoditha, A. curvidigitata.
Chthonius minotaurus is a species of pseudoscorpion in the Chthoniidae family that is endemic to Crete.
Pseudotyrannochthonius silvestrii is a species of Chilean pseudoscorpions of the family Chthoniidae. It was described in 1905 by Edvard Ellingsen, with a type locality of Santiago, Chile.
Austrochthonius insularis is a species of pseudoscorpions in the family Chthoniidae.
Tyrannochthonius rex is a species of pseudoscorpion in the family Chthoniidae.
Chthonius tetrachelatus is a species of pseudoscorpions in the family Chthoniidae.
Ayyalonia dimentmani is a species of pseudoscorpion in the Chthoniidae family that is endemic to Israel.
Neochthonius is a genus of pseudoscorpions belonging to the family Chthoniidae.
Pseudotyrannochthoniidae is a family of pseudoscorpions, belonging to the superfamily Chthonioidea. It represents the most basal and primitive group of living pseudoscorpions, containing 50 species in 5 genera. Living members of the group have a strongly disjunct distribution, likely reflecting ancient vicariance, occurring in Australia, Asia, Southern Africa and Madagascar, Western North America and southern South America. Fossils species are known from the Eocene Baltic and Bitterfeld amber, which represent members of extant Asian genera.
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