L-number

The L-number system is a pseudo-scientific classification system of catfish based on photographs of shipments of tropical catfish of the family Loricariidae published by the German aquarium magazine DATZ (Die Aquarien- und Terrarienzeitschrift (The Aquarium and Terrarium Magazine)). The first L-number was published in 1988.

An L-number is not a formal scientific designation, but it does allow people to identify various loricariid catfish by a "common name" before the fish is actually officially described. When a loricariid receives an official scientific name, the L-number (or numbers) is retired.^[1] and best practice is then to use the scientific name.

A specific L-number classification does not guarantee a discrete species, multiple L numbers have been given to different populations of the same species. To add to the confusion, sometimes a single L-number may actually be used for multiple species.

Additionally the aquarium magazine 'Das Aquarium' introduced a similar system using the prefix 'LDA'.

L-number catfish articles

The L-numbers are listed below in numerical order.^[2] The preceding number holds precedence over the higher or "alternative" L-numbers; but can sometimes be used to describe the same species or type from another locality.

References

1. ↑ Shane Linder. "What are L Numbers?". 
2. ↑ "Cat-eLog::All l-numbers". PlanetCatfish.com. Retrieved 2007-04-28.