Notodiaptomus is a genus of copepod

Copepod

Copepods are a group of small crustaceans found in the sea and nearly every freshwater habitat. Some species are planktonic , some are benthic , and some continental species may live in limno-terrestrial habitats and other wet terrestrial places, such as swamps, under leaf fall in wet forests,...

s in the family Diaptomidae

Diaptomidae

Diaptomidae is a family of freshwater pelagic copepods. It includes around 50 genera:*Acanthodiaptomus Kiefer, 1932*Aglaodiaptomus Light, 1938*Allodiaptomus Kiefer, 1936*Arctodiaptomus Kiefer, 1932*Argyrodiaptomus Brehm, 1933...

. It is the most widely distributed, most abundant and most species-rich genus of freshwater calanoid

Calanoida

Calanoida is an order of copepods, a kind of zooplankton. They include around 40 families with about 1800 species of both marine and freshwater copepods. Calanoid copepods are dominant in the plankton in many parts of the world's oceans, making up 55%–95% of plankton samples...

 copepods in the Neotropics. The genus was erected in 1936 by Friedrich Kiefer

Friedrich Kiefer

Professor Friedrich Kiefer was a German zoologist, specialising in freshwater copepods. For over 60 years, he was "the preeminent morphological taxonomist of continental free-living copepods"....

 for eleven species formerly placed in a wider Diaptomus

Diaptomus

Diaptomus is a genus of copepods with a single eye spot. It is superficially similar in size and appearance to Cyclops. However it has characteristically very long first antennae that exceed the body length. In addition, the females carry the eggs in a single sac rather than the twin sacs seen in...

. Notodiaptomus deitersi was chosen to be the type species

Type species

In biological nomenclature, a type species is both a concept and a practical system which is used in the classification and nomenclature of animals and plants. The value of a "type species" lies in the fact that it makes clear what is meant by a particular genus name. A type species is the species...

 by Raúl Adolfo Ringuelet in 1958.

The genus Notodiaptomus includes 34 valid species, and two species inquirenda

Species inquirenda

In biological classification, a species inquirenda is a species of doubtful identity requiring further investigation. The use of the term in English-language biological literature dates back to at least the early nineteenth century....

. Its members include the Venezuela

Venezuela

Venezuela , officially called the Bolivarian Republic of Venezuela , is a tropical country on the northern coast of South America. It borders Colombia to the west, Guyana to the east, and Brazil to the south...

n endemic Notodiaptomus maracaibensis and the Brazil

Brazil

Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...

ian endemic Notodiaptomus dubius, both of which are listed as vulnerable species

Vulnerable species

On 30 January 2010, the IUCN Red List of Threatened Species identified 9694 Vulnerable species, subspecies and varieties, stocks and sub-populations.-References:...

 on the IUCN Red List

IUCN Red List

The IUCN Red List of Threatened Species , founded in 1963, is the world's most comprehensive inventory of the global conservation status of biological species. The International Union for Conservation of Nature is the world's main authority on the conservation status of species...

.

• Notodiaptomus amazonicus (S. Wright, 1935)
• Notodiaptomus anceps Brehm, 1958
• Notodiaptomus anisitsi (Daday, 1905)
• Notodiaptomus bidigitatus (Brehm, 1958)
• Notodiaptomus brandorffi Reid, 1987
• Notodiaptomus carteri (Lowndes, 1934)
• Notodiaptomus cearensis (S. Wright, 1936)
• Notodiaptomus conifer (G. O. Sars, 1901)
• Notodiaptomus coniferoides (S. Wright, 1927)
• Notodiaptomus dahli (S. Wright, 1936)
• Notodiaptomus deitersi (Poppe, 1891)
• Notodiaptomus dentatus Paggi, 2001
• Notodiaptomus difficilis Dussart & Frutos, 1987
• Notodiaptomus dilatatus Dussart, 1984
• Notodiaptomus dubius Dussart, 1986
• Notodiaptomus echinatus (Lowndes, 1934)
• Notodiaptomus gibber (Poppe, 1889)
• Notodiaptomus henseni (F. Dahl, 1894)
• Notodiaptomus iheringi (S. Wright, 1935)
• Notodiaptomus incompositus (Brian, 1925)
• Notodiaptomus inflatus (Kiefer, 1933)
• Notodiaptomus isabelae (S. Wright, 1936)
• Notodiaptomus jatobensis (S. Wright, 1936)
• Notodiaptomus lobifer (Pesta, 1927)
• Notodiaptomus maracaibensis Kiefer, 1954
• Notodiaptomus nordestinus (S. Wright, 1935)
• Notodiaptomus orellanai Dussart, 1979
• Notodiaptomus paraensis Dussart & B. A. Robertson, 1984
• Notodiaptomus pseudodubius Defaye & Dussart, 1989
• Notodiaptomus santaremensis (S. Wright, 1927)
• Notodiaptomus simillimus Cicchino, Santos-Silva & Robertson, 2001
• Notodiaptomus spinuliferus Dussart, 1986
• Notodiaptomus susanae (Paggi, 1976)
• Notodiaptomus transitans (Kiefer, 1929)
• Notodiaptomus ohlei (Brandorff, 1978) (species inquirenda
  Species inquirenda
  In biological classification, a species inquirenda is a species of doubtful identity requiring further investigation. The use of the term in English-language biological literature dates back to at least the early nineteenth century....
  
  )
• Notodiaptomus santafesinus Ringuelet & Ferrato, 1967 (species inquirenda
  Species inquirenda
  In biological classification, a species inquirenda is a species of doubtful identity requiring further investigation. The use of the term in English-language biological literature dates back to at least the early nineteenth century....
  
  )