''Chaetocorophium'' is a

monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ...

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

amphipods Amphipoda is an order of malacostracan crustaceans with no carapace and generally with laterally compressed bodies. Amphipods range in size from and are mostly detritivores or scavengers. There are more than 9,900 amphipod species so far descri ...

in the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Corophiidae Corophiidae is a family of amphipods, containing the following genera: *'' Americorophium'' Bousfield & Hoover, 1997 *'' Anonychocheirus'' Moore & Myers, 1983 *'' Apocorophium'' Bousfield & Hoover, 1997 *'' Bathyphotis'' Stephensen, 1944 *'' Cha ...

, containing only the species ''Chaetocorophium lucasi''. ''Chaetocorophium'' is very closely related to ''

Paracorophium ''Paracorophium'' is a genus of amphipods in the family Corophiidae. Species * ''Paracorophium brisbanensis'' Chapman, 2002 * ''Paracorophium excavatum ''Paracorophium excavatum'' is a species of amphipod in the family Corophiidae. It has be ...

'', and some researchers propose synonymising the two genera. ''C. lucasi'' is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ...

, where it is found only in a few sites in the

North Island The North Island, also officially named Te Ika-a-Māui, is one of the two main islands of New Zealand, separated from the larger but much less populous South Island by the Cook Strait. The island's area is , making it the world's 14th-largest ...

(

Lake Rotorua , image = Lake Rotorua.jpg , caption = Lake Rotorua , alt = Lake Rotorua , image_bathymetry = , pushpin_map=New Zealand#North Island , pushpin_map_alt = Location of Lake Rotorua , pushpin_relief=yes , caption_bathymetry = , location = R ...

Lake Waikare Lake Waikare is the largest of several shallow lakes in the upper floodplain of the Waikato River in New Zealand's North Island. It is a riverine lake, located to the east of Te Kauwhata and 40 kilometres north of Hamilton. It covers . Due to its ...

, Lake Rotoiti, at Whakatane,

Raglan Raglan may refer to: People *FitzRoy Somerset, 1st Baron Raglan (1788–1855), British Army officer, commander of British troops during the Crimean War *Raglan (surname) *Raglan Squire (1912–2004), British architect Places Australia *Count ...

, Waitara, and

Wanganui Whanganui (; ), also spelled Wanganui, is a city in the Manawatū-Whanganui region of New Zealand. The city is located on the west coast of the North Island at the mouth of the Whanganui River, New Zealand's longest navigable waterway. Whangan ...

) and in lakes and intertidal mudflats across

South Island The South Island, also officially named , is the larger of the two major islands of New Zealand in surface area, the other being the smaller but more populous North Island. It is bordered to the north by Cook Strait, to the west by the Tasman ...

. It is

epigean Epigeal, epigean, epigeic and epigeous are biological terms describing an organism's activity above the soil surface. In botany, a seed is described as showing epigeal germination when the cotyledons of the germinating seed expand, throw off the ...

, and was listed as "Sparse" in the 2002 New Zealand Threat Classification System list for

freshwater Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does include ...

invertebrate Invertebrates are a paraphyletic group of animals that neither possess nor develop a vertebral column (commonly known as a ''backbone'' or ''spine''), derived from the notochord. This is a grouping including all animals apart from the chordate ...

References

Corophiidea Freshwater crustaceans of New Zealand Monotypic crustacean genera {{amphipod-stub