| Daphnia commutata | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Subphylum: | Crustacea |
| Class: | Branchiopoda |
| Order: | Cladocera |
| Family: | Daphniidae |
| Genus: | Daphnia |
| Subgenus: | Daphnia |
| Species: | D. commutata |
| Binomial name | |
| Daphnia commutata Ekman, 1900 | |
Daphnia commutata is a species of water flea. [1]
Branchiopoda is a class of crustaceans. It comprises fairy shrimp, clam shrimp, Cladocera, Notostraca and the Devonian Lepidocaris. They are mostly small, freshwater animals that feed on plankton and detritus.
Daphnia is a genus of small planktonic crustaceans, 0.2–5.0 mm (0.01–0.20 in) in length. Daphnia are members of the order Cladocera, and are one of the several small aquatic crustaceans commonly called water fleas because their saltatory (Wiktionary) swimming style resembles the movements of fleas. Daphnia spp. live in various aquatic environments ranging from acidic swamps to freshwater lakes and ponds.
A carapace is a dorsal (upper) section of the exoskeleton or shell in a number of animal groups, including arthropods, such as crustaceans and arachnids, as well as vertebrates, such as turtles and tortoises. In turtles and tortoises, the underside is called the plastron.
Onychopoda are a specialised suborder of branchiopod crustaceans, belonging to the order Cladocera.
Alona is a genus of cladocerans in the family Chydoridae. It is one of the largest genera of Cladocera, and is widely believed to be an artificial group which is in need of systematic revision; the type species is Alona quadrangularis. Around 240 names at the species level have been described in Alona; it is unclear how many of these are valid, or how they are related.
Daphnia occidentalis is a species of crustacean in the family Daphniidae. It is endemic to Australia, and is the only species in the subgenus Australodaphnia.
The Cladocera are an order of small crustaceans commonly called water fleas. Over 650 species have been recognised so far, with many more undescribed. They first appeared before the Permian period, and have since invaded most freshwater habitats. Some have also adapted to a life in the ocean, the only members of Branchiopoda to do so, even if several anostracans live in hypersaline lakes. Most are 0.2–6.0 mm (0.01–0.24 in) long, with a down-turned head with a single median compound eye, and a carapace covering the apparently unsegmented thorax and abdomen. Most species show cyclical parthenogenesis, where asexual reproduction is occasionally supplemented by sexual reproduction, which produces resting eggs that allow the species to survive harsh conditions and disperse to distant habitats.
Daphniidae is a family of water fleas in the suborder Anomopoda.
Moinidae is a crustacean family within the order Cladocera. Species within this family are widely occurring, including North America and Africa. In newer classifications, it is sometimes included in the family Daphniidae.
Leptodora is a genus containing two species of large, nearly transparent predatory water fleas. They grow up to 21 mm (0.83 in) long, with two large antennae used for swimming and a single compound eye. The legs are used to catch copepods that it comes into contact with by chance. Leptodora kindtii is found in temperate lakes across the Northern Hemisphere and is probably the only cladoceran ever described in a newspaper; L. richardi is only known from eastern Russia. For most of the year, Leptodora reproduces parthenogenetically, with males only appearing late in the season, to produce winter eggs which hatch the following spring. Leptodora is the only genus in its family, the Leptodoridae, and suborder, Haplopoda.
Anomopoda is a suborder of the order Cladocera. These crustaceans, a type of water flea, are members of the Class Branchiopoda. The Anomopoda typically have five pairs of thoracic limbs, but sometimes have six pairs. The head of the Anomopoda lacks a clear separation from the trunk and the posterior, while the abdomen area gradually merges with the anterior of the trunk.
Pseudopenilia bathyalis is a species of cladoceran, described in 2004, that lives at depths of 1,900–2,140 m (6,230–7,020 ft) in the anoxic zone of the Black Sea. Originally described in the family Sididae, it was transferred to its own family, the Pseudopenilidae, in 2008.
The Ctenopoda are a suborder of the order Cladocera, comprising the three families Holopediidae, Pseudopenilidae, and Sididae. Its members mostly live in fresh water, but Penilia is marine.
Ephippia are winter or dry-season eggs of the various species of small crustacean in the order Cladocera ; they are provided with an extra shell layer, which preserves and protects the resting stages inside from harsh environmental conditions until the more favorable times, such as spring, when the reproductive cycle is able to take place once again. Ephippia are part of the back of a mother carrying them until they are fully developed. After molting, the ephippium stays in the water, or in the soil of dried puddles, small ponds, and vernal pools. The resting stages are often called eggs, but are in fact embryos with arrested development. Ephippia can rest for many years before the embryo resumes development upon an appropriate hatching stimulus.
Daphnia is one of the three subgenera of the genus Daphnia, the others being Australodaphnia and Ctenodaphnia.
Eugen von Daday or Jenő von Daday (1855–1920) was a Romanian professor of zoology in Hungary in the late 19th and early 20th century. Daday was an expert on aquatic invertebrates, particularly crustaceans. Daday collected and identified many species and genera within the borders of the Hungarian empire, and received samples of invertebrates from collectors around the world. After his death in 1920, Daday's collection of crustaceans was acquired by the Hungarian Natural History Museum.
Cladoceras is a monotypic genus of flowering plants in the family Rubiaceae. The genus contains only one species, viz. Cladoceras subcapitatum, which is endemic to eastern Kenya and Tanzania.
Daphnia longispina is a planktonic crustacean of the family Daphniidae, a cladoceran freshwater water flea. It is native to Eurasia. D. longispina is similar in size and sometimes confused with the often sympatric D. pulex, but much smaller than D. magna. D. longispina is found in a wide range of standing freshwater bodies from small, ephemeral rock-pools to large lakes.
Sida is a genus of ctenopods in the family Sididae. There are about five described species in Sida.
Chydoridae is a family of water fleas in the order Anomopoda. There are more than 50 genera and 520 described species in Chydoridae.
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