Hypostomus nigromaculatus
Hypostomus nigromaculatus is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the middle and upper Paraná River basin in Brazil. The species reaches 10.2 cm (4 inches) in standard length and is believed to be a facultative air-breather. Hypostomus nigromaculatus sometimes appears in the aquarium trade, where it is typically referred to either as the dot pleco or by its associated L-number, which is LDA-012. References 

nigromaculatus
Fish described in 1964