The Chinese paddlefish, also known as Chinese swordfish, is a reportedly extinct species of fish that was native to the Yangtze and Yellow River basins in China. At maturity, the species measured an average length of 3 m (9.8 ft), making it one of the largest species of primarily freshwater fishes. It was the only species in the genus Psephurus and one of two living species in the paddlefish family (Polyodontidae), the other being the American paddlefish. It was an anadromous species, meaning that it spent part of its adult life at sea, while migrating upriver to spawn. Unlike its close relative, the Chinese paddlefish was largely piscivorous, and mainly preyed on small to medium-sized fish.
The conservation status of a group of organisms indicates whether the group still exists and how likely the group is to become extinct in the near future. Many factors are taken into account when assessing conservation status: not simply the number of individuals remaining, but the overall increase or decrease in the population over time, breeding success rates, and known threats. Various systems of conservation status exist and are in use at international, multi-country, national and local levels as well as for consumer use.
The pyrrhuloxia or desert cardinal is a medium-sized North American song bird found in the American southwest and northern Mexico. This distinctive species with a short, stout bill and red crest and wings, and closely resembles the Northern cardinal and the Vermilion cardinal which are in the same genus.
A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation. They do not qualify as threatened, near threatened, or conservation dependent.
A near-threatened species is a species which has been categorized as "Near Threatened" (NT) by the International Union for Conservation of Nature as that may be endangered in the near future, although it does not currently qualify for the threatened status.
Monolistra schottlaenderi is a species of isopod in the family Sphaeromatidae.
Nitocrella slovenica is a species of harpacticoid copepod in the family Ameiridae.
Skistodiaptomus bogalusensis is a species of calanoid copepod in the family Diaptomidae.
Skistodiaptomus is a genus of freshwater copepods in the family Diaptomidae, found across North America. The genus contains eight species, three of which are endemic to the United States and are listed on the IUCN Red List as vulnerable species (VU) or Data Deficient (DD).
Skistodiaptomus carolinensis is a species of calanoid copepod in the family Diaptomidae.
Spelaeoecia bermudensis is a species of ostracod in the family Deeveyidae.
Thermosphaeroma macrura is a species of isopod in the family Sphaeromatidae. It is found in Mexico.
Thermosphaeroma milleri is a species of isopod in the family Sphaeromatidae. It is found in Mexico.
Thermosphaeroma smithi is a species of isopod in the family Sphaeromatidae. It is found in Mexico.
Tropodiaptomus simplex is a species of calanoid copepod in the family Diaptomidae.
Sinustrombus sinuatus, common name the laciniate conch, is a species of sea snail, a marine gastropod mollusc in the true conch family, Strombidae. It is native to the tropical Indo-Pacific region.
The serrated hinged terrapin is a species of turtle in the family Pelomedusidae. The species is native to East Africa and Southern Africa. There are two recognised subspecies.
Austropyrgus sinuatus is a species of minute freshwater snail with an operculum, an aquatic gastropod mollusc or micromollusc in the Hydrobiidae family. This species is endemic to western Victoria, Australia. It is known from only one location on Mount Emu Creek, south of Terang.
Lestes disjunctus, the northern spreadwing, is a species of spreadwing in the damselfly family Lestidae. It is found in North America.
Lestes eurinus, the amber-winged spreadwing, is a species of spreadwing in the damselfly family Lestidae. It is found in North America.
