''Lophiobrycon weitzmani'' is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

of small

characin Characiformes is an order of ray-finned fish, comprising the characins and their allies. Grouped in 18 recognized families, more than 2000 different species are described, including the well-known piranha and tetras.; Buckup P.A.: "Relationshi ...

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 ...

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

, where it is found in the upper

Paraná River The Paraná River ( es, Río Paraná, links=no , pt, Rio Paraná, gn, Ysyry Parana) is a river in south-central South America, running through Brazil, Paraguay, and Argentina for some ."Parana River". Encyclopædia Britannica. Encyclopædia Br ...

basin. It is considered

threatened Threatened species are any species (including animals, plants and fungi) which are vulnerable to endangerment in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of ''critical depensat ...

by Brazil's Ministry of the Environment.

ICMBio The Chico Mendes Institute for Biodiversity Conservation (Portuguese: ''Instituto Chico Mendes de Conservação da Biodiversidade'', ICMBio) is the Brazilian Ministry of the Environment's administrative arm."Brazilian Federal Law 11.516/2007 (Por ...

(Ministry of the Environment, Brazil)
Portaria MMA nº 445, de 17 de dezembro de 2014
Lista de Especies Ameaçadas - Saiba Mais. Retrieved 1 December 2018. This species is the only member of the

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 ...

''Lophiobrycon'', but it is closely related to ''

Glandulocauda ''Glandulocauda'' is a genus of small characin freshwater fish that are endemic to Brazil, where restricted to the upper Paraná basin and coastal river basins in São Paulo state.Thomaz, A.T., Arcila, D., Ortí, G. & Malabarba, L.R. (2015): Mo ...

'' and ''

Mimagoniates ''Mimagoniates'' is a genus of characid fish from rivers and streams in southeastern, southern and central-western Brazil, northeastern Argentina, and Paraguay.Thomaz, A.T., Arcila, D., Ortí, G. & Malabarba, L.R. (2015): Molecular phylogeny of ...

'' (together they form the

tribe The term tribe is used in many different contexts to refer to a category of human social group. The predominant worldwide usage of the term in English language, English is in the discipline of anthropology. This definition is contested, in p ...

Glandulocaudini).Thomaz, A.T., Arcila, D., Ortí, G. & Malabarba, L.R. (2015): Molecular phylogeny of the subfamily Stevardiinae Gill, 1858 (Characiformes: Characidae): classification and the evolution of reproductive traits. ''BMC Evolutionary Biology, (2015) 15: 146.'' Named in honor of Stanley H. Weitzman (1927-2017),

Smithsonian Institution The Smithsonian Institution ( ), or simply the Smithsonian, is a group of museums and education and research centers, the largest such complex in the world, created by the U.S. government "for the increase and diffusion of knowledge". Founded ...

, for his “seminal” work on the systematics of neotropical characiformes, particularly the subfamily Glandulocaudinae (now subsumed into Stevardiinae).

References

Glandulocaudini Monotypic fish genera Fish of South America Fish of Brazil Endemic fish of Brazil Fish described in 2003 {{characidae-stub