In the last few decades, many danionin species have been moved into different genera, in some cases repeatedly; similarly, some species have been synonymised with other species and even in some cases later unsynonymised, all of which has caused confusion. With a large number of recent discoveries, particularly in Myanmar in recent years, confusion has been caused. As a result, a separate page has been created which lists all danionin species and also lists defunct species which have since been synonymised or renamed. Individual danionin species are listed below in order of genus:
The species remaining in the genus Danio comprise most of the danionins familiar to aquarists. They have two pairs of long barbels and are generally characterised by horizontal stripes (with the exception of the Panther Danio, Glowlight Danio and Black Barred Danio which have vertical bars. In size they range from 4cm/ 1.75 in) to 15cm/ 6 in).
Frequently used common names are given for reference, but if the common name does not appear, click on it on the section above for more details.
The Devario species comprise some danionins familiar to aquarists. Generally larger fish than Danios, they have short barbels (if present at all) and generally have deeper bodies than Danio, with species having vertical stripes present (as well as horizontal). In size, they range from 5 to 15cm (2 to 6 in).
Little is known about the following Devario species, but some information exists about them at the Fishbase Devario index(Fishbase: Ed. Rainer Froese and Daniel Pauly. July 2005 version)
The genus name Microrasbora means "small Rasbora", but these fish appear to be more closely related to the Danio species than Rasbora. Speculation exists that Microrasbora erythromicron may be transferred to the genus Danio, but this now seems unlikely.
A genus with only one species, the genus Sundadanio was created after Rasbora axelrodi species was transferred to this genus. S. axelrodi resembles a tiny Rasbora.
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