| Halocyprididae | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Ostracoda |
| Order: | Halocyprida |
| Suborder: | Halocypridina |
| Family: | Halocyprididae Dana, 1853 |
| Subfamilies | |
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| Synonyms [1] | |
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Halocypridae is a family of ostracods belonging to the order Halocyprida. This family contains bioluminescent members such as Conchoecia pseudodiscophora, which are believed to use coelenterazine and a coelenterazine luciferase rather than vargulin. [2]
The following genera are recognised in the family Halocyprididae: [3]
Luciferase is a generic term for the class of oxidative enzymes that produce bioluminescence, and is usually distinguished from a photoprotein. The name was first used by Raphaël Dubois who invented the words luciferin and luciferase, for the substrate and enzyme, respectively. Both words are derived from the Latin word lucifer, meaning "lightbearer", which in turn is derived from the Latin words for "light" (lux) and "to bring or carry" (ferre).
Ostracods, or ostracodes, are a class of the Crustacea, sometimes known as seed shrimp. Some 33,000 species have been identified, grouped into 7 valid orders. They are small crustaceans, typically around 1 mm (0.04 in) in size, but varying from 0.2 to 30 mm in the case of the marine Gigantocypris. The largest known freshwater species is Megalocypris princeps, which reach 8mm in length. In most cases, their bodies are flattened from side to side and protected by a bivalve-like valve or "shell" made of chitin, and often calcium carbonate. The family Entocytheridae and many planktonic forms do not have calcium carbonate. The hinge of the two valves is in the upper (dorsal) region of the body. Ostracods are grouped together based on shell and soft part morphology. While early work indicated the group may not be monophyletic and early molecular phylogeny was ambiguous on this front, recent combined analyses of molecular and morphological data suggested monophyly in analyses with broadest taxon sampling, but this monophyly had no or very little support. They have a wide range of diets, and the class includes carnivores, herbivores, scavengers and filter feeders, but most ostracods are deposit feeders.
The Vincent O'Brien National Stakes is a Group 1 flat horse race in Ireland open to two-year-old thoroughbred colts and fillies. It is run at the Curragh over a distance of 7 furlongs, and it is scheduled to take place each year in September.
AFI's 100 Years...100 Stars is the American Film Institute's list ranking the top 25 male and 25 female greatest screen legends of American film history and is the second list of the AFI 100 Years... series.
Cylindroleberididae is a family of ostracods that shows remarkable morphological diversity. The defining feature is the possession of gills: 7–8 leaf-like pairs at the posterior of the body. Other features common to all species in the family include a "baleen-comb" on both the maxilla and the fifth limb, a sword-shaped coxal endite on the mandible, and the triaenid bristles on the basal endites of the mandible.
Tropidophora is a genus of land snails with an operculum, terrestrial gastropod mollusks in the family Pomatiidae.
Gigantocypris, sometimes known as giant ostracod or giant seed shrimp, is a genus of ostracod crustaceans in family Cypridinidae, and among the most well-known members of the class Ostracoda. Its members are extremely large for ostracods, measuring up to 3.2 cm (1.3 in) across, have a globular shape, are typically semi-transparent orange or reddish, and have a large pair of mirror-like eyes that are used to locate their small animal prey. They are found worldwide in dark, deep and cold oceans.
Athleta is a genus of sea snails, marine gastropod mollusks in the family Volutidae.
Cyprididae is "the most diverse group of freshwater ostracods". It contains over 1000 species, which represents 50% of the known species of freshwater ostracods. Around 60% of genera in the family are endemic to a single zoogeographic region. The family contains 16 subfamilies, and is most diverse in the Afrotropical realm, with over 300 species in 45 genera. Many Cyprididae occur in temporary water bodies and have drought-resistant eggs, mixed/parthenogenetic reproduction and ability to swim. These biological attributes pre-adapt them to form successful radiations in these habitats. Bennelongia is an interesting of the family Cyprididae. It may be the last true descendant of the Mesozoic lineage of Cypridea, which was a dominant lineage of ostracod in non-marine waters in the Cretaceous.
Candonidae is a family of ostracods, containing around 25% of all known species of freshwater ostracods. Around 75% of genera in the family are endemic to a single zoogeographic region. It contains more than 500 species, of which more than 300 are endemic to the Palearctic realm.
Azygocypridina is a genus of ostracods in the family Cypridinidae, which appears to be "the least derived living ostracod", having remained largely unchanged for 350 million years. It contains the following species:
Conchoeciinae is a subfamily of ostracods in the family Halocypridae.
Conchoecia is a genus of ostracods in the subfamily Conchoeciinae.
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