A flea is a parasitic insect.
Mecoptera are an order of insects in the superorder Endopterygota with about six hundred species in nine families worldwide. Mecopterans are sometimes called scorpionflies after their largest family, Panorpidae, in which the males have enlarged genitals that look similar to the stingers of scorpions, and long beaklike rostra. The Bittacidae, or hangingflies, are another prominent family and are known for their elaborate mating rituals, in which females choose mates based on the quality of gift prey offered to them by the males. A smaller group is the snow scorpionflies, family Boreidae, adults of which are sometimes seen walking on snowfields. In contrast, the majority of species in the order inhabit moist environments in tropical locations.
Cape Hallett is a snow-free area on the northern tip of the Hallett Peninsula on the Ross Sea coast of Victoria Land, East Antarctica. Cape Adare lies 100 km (62 mi) to the north.
Apteropanorpidae is a family of wingless scorpionflies containing a single genus, Apteropanorpa, with four named species. These species, also called Tasmanian snow scorpionflies are found in moss in Tasmania and southern Australia. The adults are generalised predators. The larvae live in moss and are locally common.
Sminthurus viridis is a member of the Collembola, the springtails, an order in the subphylum Hexapoda. The species is known by common names such as clover springtail, lucerne flea, or lucerne earth flea.
Boreidae, commonly called snow scorpionflies, or in the British Isles, snow fleas are a very small family of scorpionflies, containing only around 30 species, all of which are boreal or high-altitude species in the Northern Hemisphere. Recent research indicates the boreids are more closely related to fleas than to other scorpionflies, which renders the order Mecoptera paraphyletic if the order Siphonaptera is excluded from it.
Eomeropidae is a family of aberrant, flattened scorpionflies represented today by only a single living species, Notiothauma reedi, known from the Nothofagus forests in southern Chile, while all other recognized genera in the family are known only as fossils, with the earliest from Triassic-aged strata, and the youngest from Paleogene-aged strata.
Amphiesmenoptera is an insect superorder, established by S. G. Kiriakoff, but often credited to Willi Hennig in his revision of insect taxonomy for two sister orders: Lepidoptera and Trichoptera (caddisflies). In 2017, a third fossil order was added to the group, the Tarachoptera.
The Neuropterida are a clade, sometimes placed at superorder level, of holometabolous insects with over 5,700 described species, containing the orders Neuroptera, Megaloptera, and Raphidioptera (snakeflies).
Springtails (Collembola) form the largest of the three lineages of modern hexapods that are no longer considered insects. Although the three orders are sometimes grouped together in a class called Entognatha because they have internal mouthparts, they do not appear to be any more closely related to one another than they are to all insects, which have external mouthparts.
Sminthuridae is a family of springtails of the order Symphypleona. Sminthurids are commonly referred to as globular springtails.
In the 10th edition of Systema Naturae, Carl Linnaeus classified the arthropods, including insects, arachnids and crustaceans, among his class "Insecta". He described the Insecta as:
A very numerous and various class consisting of small animals, breathing through lateral spiracles, armed on all sides with a bony skin, or covered with hair; furnished with many feet, and moveable antennae, which project from the head, and are the probable instruments of sensation.
The glacier flea is a species of springtail. D. saltans is the common glacier flea, but there are several springtail species that are also called glacier fleas, and which catch the attention on snow surfaces due to their dark body colouring, their hopping motion and the fact that they often gather in large groups. These include, for example, Desoria nivalis or Vertagopus alpinus.
Hypogastrura tooliki, the toolik snow flea, is a species of springtails in the family Hypogastruridae.
Boreus nivoriundus, known generally as the snow-born boreus or snow scorpionfly, is a species of snow scorpionfly in the family Boreidae. It is found in North America.
Boreus coloradensis is a species of snow scorpionfly in the family Boreidae. It is found in North America.
Hypogastrura harveyi, the snow flea, is a species of springtails in the family Hypogastruridae.
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