ZOOPLANKTON OF THE RIVER SOKOTO, THE RHIZOPODA TESTACEA

Authors


Abstract

Thirty-two species of testaceous Rhizopoda have been identified from the plankton of the River Sokoto. Most of these species are adventitious in the plankton, and are most abundant in the wet season when the river is in flood. Four species: Arcella vulgaris, Difflugia limnetica, D. lobostoma and Centropyxis aculeata occur regularly in the plankton during the dry season, and show evidence of producing light shelled forms which adopt a planktonic mode of life.

Ancillary