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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.
Cryptopygus antarcticus, the Antarctic springtail, is a species of springtail native to Antarctica and Australia. Cryptopygus antarcticus average 1–2 millimetres (0.04–0.08 in) long and weigh only a few micrograms. Like other springtails, the Antarctic springtail has been found to be useful as a bioindicator of pollution and has been used to study microplastic pollution in Antarctica. They also tend aggregate, by signaling to other individuals via pheromones, especially when temperatures are low, to avoid a high water loss rate.
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The subphylum Hexapoda or hexapods comprises the largest clade of arthropods and includes most of the extant arthropod species. It includes the crown group class Insecta, as well as the much smaller class Entognatha, which includes three orders of wingless arthropods that were once considered insects: Collembola (springtails), Protura (coneheads) and Diplura. The insects and springtails are very abundant and are some of the most important pollinators, basal consumers, scavengers/detritivores and micropredators in terrestrial environments.
Mionochroma elegans is a species of beetle in the family Cerambycidae. It was described by Olivier in 1790. It is known from Guadeloupe, Grenada, Dominica, and St. Lucia.
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Sminthurinus is a genus of springtails and allies in the family Katiannidae. There are about 19 described species in Sminthurinus.
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Cryptopygus is a genus of springtails. Cryptopygus belongs to the Isotomidae family.
Clavagella is a genus of marine bivalves in the family Clavagellidae.
Cyclocardia elegans is an extinct species of clam in the family Carditidae.
Mesochernes elegans is a species of pseudoscorpions in the family Chernetidae. It is found in Venezuela.
Cavilucina is a genus of bivalves in the family Lucinidae.
Cattleya × elegans is a hybrid orchid in the subtribe Laeliinae. It is a pseudobulb epiphyte. Its formula hybridae is Cattleya purpurata Van den Berg (2008) × Cattleya tigrina A.Rich. (1848). It is found in South and South-East Brazil.
Cosmacanthus is an extinct genus of placoderms in the extinct family Groenlandaspididae that lived during the Late Devonian in Ireland, the UK, Russia and North America. It was named by Louis Agassiz in 1845.
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Pyotr Petrovich Vtorov was a Soviet scientist biogeographer, ecologist, zoologist and nature conservation activist. He founded a new direction of scientific research called Synthetic Biogeography, and developed a scientific concept for the creation of reference areas of the biosphere. He was an author of textbooks, a guide to birds, scientific and popular books.
References
- ↑ On the variability of Hypogastrura manubrialis (Tullb.)(Collembola). EH Rapoport, DE Cutini de Izarra - Journal of Natural History, 1962, pages 205-208, doi:10.1080/00222936208651236
