River systems. A. psammatides from the Paraguaçu River. A. virgulatus from the coastal rivers in Espírito Santo. A. depinnai is from the Ipojuca River basin, Pernambuco State. A. taurus is known from the upper Itiquira River and upper Taquari River, both tributaries of the Paraguay River, Mato Grosso State, Brazil. In the aquarium Aspidoras do fairly well in aquaria under similar conditions as for most Corydoras species. The water conditions that seem best are a pH of 6.8 to 7.0 and a temperature of about 22 °C to 26 °C. The species that is most likely to be found in an aquarium is the sixray corydoras, Aspidoras pauciradiatus. References Callichthyidae Taxa named by Rodolpho von Ihering Fish of South America Catfish genera Freshwater fish genera