Danio erythromicron is a species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 of cyprinid

Cyprinid

The family Cyprinidae, from the Ancient Greek kyprînos , consists of the carps, the true minnows, and their relatives . Commonly called the carp family or the minnow family, its members are also known as cyprinids...

 fish which is endemic to Inle Lake

Inle Lake

Inle Lake is a freshwater lake located in the Nyaungshwe Township of Taunggyi District of Shan State, part of Shan Hills in Myanmar . It is the second largest lake in Myanmar with an estimated surface area of , and one of the highest at an altitude of...

 in Myanmar

Myanmar

Burma , officially the Republic of the Union of Myanmar , is a country in Southeast Asia. Burma is bordered by China on the northeast, Laos on the east, Thailand on the southeast, Bangladesh on the west, India on the northwest, the Bay of Bengal to the southwest, and the Andaman Sea on the south....

.

Taxonomy and systematics

In 1999, it was suggested that the species be transferred to the genus Danio

Danio

The Danio genus comprises many of the species of danionins familiar to aquarists. The common name "danio" is used for members of the genera Danio and Devario.-Taxonomy:...

based on morphological

Morphology (biology)

In biology, morphology is a branch of bioscience dealing with the study of the form and structure of organisms and their specific structural features....

 data, but it was cautioned that more research would be necessary. A phylogenetic analysis of Danio found it indeed close to that genus, but its precise placement was still indeterminable. Shortly thereafter, a new species, Danio margaritatus, was described under the name Celestichthys margaritatus. However, this new species was quickly moved into Danio following further analysis. Subsequent analysis of DNA sequence

DNA sequence

The sequence or primary structure of a nucleic acid is the composition of atoms that make up the nucleic acid and the chemical bonds that bond those atoms. Because nucleic acids, such as DNA and RNA, are unbranched polymers, this specification is equivalent to specifying the sequence of...

 data showed that Microrasbora erythromicron was related to Danio, and recommended moving this species to that genus. Later molecular analysis confirmed its placement within the genus, with its closest relatives being Danio margaritatus

Celestichthys margaritatus

The Celestial Pearl Danio, Danio margaritatus - often referred to in the aquarium trade as galaxy rasbora or "Microrasbora sp. 'Galaxy'" - is a small cyprinid from Myanmar. It has so far been found only in a very small area near Hopong east of Inle Lake, at an altitude of over 1,000 m...

and Danio choprai.