A team of researchers with members affiliated with several institutions in China, one in Canada and one in the U.S. has found evidence of naturally occurring photocurrents in inorganic mineral systems. In their paper published ...
The tectonic deformation and growth pattern of the western Kunlun, which is the northwestern margin of the Tibetan Plateau, are not currently well understood. The surface rupture caused by an earthquake can provide a unique ...
Earth Sciences
Apr 18, 2019
0
14
MAX phases are viewed as promising materials for the future, for example, in the power, aerospace and medical implants industries. A new method developed by scientists from Forschungszentrum Jülich now makes it possible ...
Materials Science
Apr 04, 2019
0
30
The heavy bombardment of terrestrial planets by asteroids from space has contributed to the formation of the early evolved crust on Earth.
Earth Sciences
Jan 31, 2019
0
20
The surface of many Old Master paintings has been affected by the appearance of whitish lead-rich deposits, which are often difficult to fully characterise, thereby hindering conservation. Painted in 1663, Rembrandt's Homer ...
Analytical Chemistry
Jan 28, 2019
0
12
A team of researchers affiliated with several institutions in Japan has found evidence that offers credence to a theory that subducted crust exists at the base of Earth's upper mantle. In their paper published in the journal ...
A German study shows that magma could rise from the upper mantle into the middle and upper crust beneath the Laacher See Volcano (Rhineland-Palatinate). This is the result of a study conducted by the Seismological Survey ...
Earth Sciences
Jan 08, 2019
0
15
An international team of researchers has found evidence supporting a theory that suggests a missing crust layer can be blamed on "Snowball Earth." In their paper published in Proceedings of the National Academy of Sciences, ...
Ryan Thigpen, an assistant professor in the Department of Earth and Environmental Sciences in the University of Kentucky College of Arts and Sciences, has co-authored a paper that describes how river erosion may lead to ...
Earth Sciences
Dec 21, 2018
0
8
To figure out where magma gathers in the earth's crust and for how long, Vanderbilt University volcanologist Guilherme Gualda and his students traveled to their most active cluster: the Taupo Volcanic Zone of New Zealand, ...
Earth Sciences
Oct 10, 2018
0
75
Thylacocephala? Branchiopoda
Remipedia Cephalocarida Maxillopoda
Ostracoda
Malacostraca
Crustaceans (Crustacea) form a very large group of arthropods, usually treated as a subphylum, which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill and barnacles. The 50,000 described species range in size from Stygotantulus stocki at 0.1 mm (0.004 in), to the Japanese spider crab with a leg span of up to 12.5 ft (3.8 m) and a mass of 44 lb (20 kg). Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) limbs, and by the nauplius form of the larvae.
Most crustaceans are free-living aquatic animals, but some are terrestrial (e.g. woodlice), some are parasitic (e.g. fish lice, tongue worms) and some are sessile (e.g. barnacles). The group has an extensive fossil record, reaching back to the Cambrian, and includes living fossils such as Triops cancriformis, which has existed apparently unchanged since the Triassic period. More than 10 million tons of crustaceans are produced by fishery or farming for human consumption, the majority of it being shrimps and prawns. Krill and copepods are not as widely fished, but may be the animals with the greatest biomass on the planet, and form a vital part of the food chain. The scientific study of crustaceans is known as carcinology (alternatively, malacostracology, crustaceology or crustalogy), and a scientist who works in carcinology is a carcinologist.
This text uses material from Wikipedia, licensed under CC BY-SA
