Keratella lenzi (Hauer, 1953): a new occurrence for Acre State, Brazil, specifically in Igarapé Jesumira located in Parque Nacional da Serra do Divisor

Abstract

Rotifers are very important freshwater plankton, and they occupy an ecological niche of small filter feeders. The extent of their distribution includes floodplains, because they tolerate environmental changes caused by an increase in water levels that leads to a diversification of niches. However, the biodiversity of floodplains is still poorly known, especially in Northeast Brazil in the state of Acre. The organisms were collected usingpond nets with a 50μm mesh size, and they were preserved in 4% formaldehyde. This paper registers the first occurrence of Keratella lenzi in Acre State. The species was identified in plankton samples from Igarapé Jesumira (7º28’10.2”S and 73º33’54.6”).

Keywords

• Igarapé Jesumira
• Keratella lenzi
• rotifers