Diversity and zoogeography of Rotifera (Monogononta) in a flood plain lake of the Ichilo River, Bolivia, with notes on little-known species

Abstract

Results are presented on a study of the momentary species diversity of Rotifera in 'Laguna Bufeos', a flood plain lake of the Ichilo River in Bolivia. A total of 104 morphospecies or monogonont Rotifera were identified from three samples collected on June 1, 1997. The species record includes 11% Neotropical endemics, 5% pantropical and 13% tropicopolitan taxa. Four taxa, viz. Aspelta lestes HARRING and MYERS, 1928; Colurella denticauda CARLIN, 1939; Ptygura intermedia (DAVIS, 1867) and Trichocerca kostei SEGERS, 1993 are newly recorded from South America, 67 morphospecies are new to the Bolivian fauna. Notes are added on some selected taxa. Brachionus amazonica KOSTE and ROBERTSON, 1983 (stat. nov.) is elevated to morphospecies rank.