Denticetopsis royeroi

Denticetopsis royeroi
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Siluriformes
Family:	Cetopsidae
Genus:	Denticetopsis
Species:	D. royeroi
Binomial name
	Denticetopsis royeroi; Ferraris, 1996

Last updated March 24, 2019

Denticetopsis royeroi is a species of whale catfish endemic to Venezuela where it is only known from the holotype collected in a tributary to the upper Rio Negro.^[1] This species grows to a length of 1.8 cm (0.7 inches).

Endemism is the ecological state of a species being unique to a defined geographic location, such as an island, nation, country or other defined zone, or habitat type; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. The extreme opposite of endemism is cosmopolitan distribution. An alternative term for a species that is endemic is precinctive, which applies to species that are restricted to a defined geographical area.

Venezuela, officially the Bolivarian Republic of Venezuela, is a country on the northern coast of South America, consisting of a continental landmass and a large number of small islands and islets in the Caribbean Sea. The capital and largest urban agglomeration is the city of Caracas. It has a territorial extension of 916,445 km². The continental territory is bordered on the north by the Caribbean Sea and the Atlantic Ocean, on the west by Colombia, Brazil on the south, Trinidad and Tobago to the north-east and on the east by Guyana. With this last country, the Venezuelan government maintains a claim for Guayana Esequiba over an area of 159,542 km². For its maritime areas, it exercises sovereignty over 71,295 km² of territorial waters, 22,224 km² in its contiguous zone, 471,507 km² of the Caribbean Sea and the Atlantic Ocean under the concept of exclusive economic zone, and 99,889 km² of continental shelf. This marine area borders those of 13 states. The country has extremely high biodiversity and is ranked seventh in the world's list of nations with the most number of species. There are habitats ranging from the Andes Mountains in the west to the Amazon basin rain-forest in the south via extensive llanos plains, the Caribbean coast and the Orinoco River Delta in the east.

The Rio Negro is the largest left tributary of the Amazon River, the largest blackwater river in the world, and one of the world's ten largest rivers by average discharge.

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Denticetopsis is a genus of catfishes of the family Cetopsidae.

Denticetopsis epa is a species of whale catfish endemic to Brazil where it is known from several localities in the lower portions of the Tocantins River basin. This species grows to a length of 4.7 cm.

Denticetopsis iwokrama is a species of whale catfish endemic to Guyana where it is only known from the type locality in the Siparuni River basin. This species grows to a length of 4.3 cm.

Denticetopsis macilenta is a species of whale catfish endemic to Guyana where it is only known from a limited area in the Essequibo River basin. This species grows to a length of 6.7 cm.

Denticetopsis praecox is a species of whale catfish endemic to Venezuela where it is known from the Baria River of the upper Rio Negro basin. This species grows to a length of 5.3 cm.

Denticetopsis sauli is a species of whale catfish endemic to Venezuela, where it is only known from the Pamoni River in the Casiquiare River basin of the upper Rio Negro system. This species grows to a length of 2.1 cm.

Denticetopsis seducta is a species of whale catfish endemic to Brazil where it has a relatively wide, albeit scattered, distribution in the central and western portions of the Amazon basin and possibly the southwestern portions of the Orinoco River basin; it is relatively disjunct from the other species of Denticetopsis. It grows to a length of 5.1 cm.

References

Froese, Rainer and Pauly, Daniel, eds. (2011). "Denticetopsis royeroi" in FishBase . December 2011 version.

FishBase is a global species database of fish species. It is the largest and most extensively accessed online database on adult finfish on the web. Over time it has "evolved into a dynamic and versatile ecological tool" that is widely cited in scholarly publications.

↑ Vari, Richard P.; Ferraris, Carl J.; de Pinna, Mário C. C. (2005). "The Neotropical whale catfishes (Siluriformes: Cetopsidae: Cetopsinae), a revisionary study" (PDF). Neotropical Ichthyology. 3 (2): 127–238. doi:10.1590/S1679-62252005000200001. Archived from the original (PDF) on 2007-09-27.

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[Vari-1] Vari, Richard P.; Ferraris, Carl J.; de Pinna, Mário C. C. (2005). "The Neotropical whale catfishes (Siluriformes: Cetopsidae: Cetopsinae), a revisionary study" (PDF). Neotropical Ichthyology. 3 (2): 127–238. doi:10.1590/S1679-62252005000200001. Archived from the original (PDF) on 2007-09-27.