''Acestrorhynchus isalineae'' 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 ...

fish Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of li ...

in the family

Acestrorhynchidae ''Acestrorhynchus'' ("needle jaw" ) is a genus of 14 species of characiform fish found only in fresh water in South America, the sole genus in the family Acestrorhynchidae. Their greatest diversity is in the Orinoco and Amazon basins. These fish ...

. It was described by Naércio Aquino de Menezes and

Jacques Géry Jacques Géry (12 March 1917, Paris – 15 June 2007, Sarlat, France) was a French ichthyologist. He was also a scientist and a Doctor of Medicine. The most notable species he described are: * Green neon tetra, ''Paracheirodon simulans'' (Géry, ...

in 1983. It is known from the

Madeira River The Madeira River ( pt, Rio Madeira, link=no ) is a major waterway in South America. It is estimated to be in length, while the Madeira-Mamoré is estimated near or in length depending on the measuring party and their methods. The Madeira is ...

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 ...

. It reaches a maximum

standard length Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology. Overall length * Standard length (SL) is the length of a fish m ...

of . The fish was named in honor of Isaline Drecq, wife of Guy van den Bossche, who was a participant in the expedition that collected the type specimens.

References

Acestrorhynchidae Taxa named by Naércio Aquino de Menezes Taxa named by Jacques Géry Fish described in 1983 {{Characiformes-stub