Morphologic variations of Ehrenbergina stack

The investigation of the benthic Foraminifera of the South Shetland Island, allowed us to detect the presence of abundant units of E. parva in Caleta Balleneros and Puerto Foster stations (Deception Island), which in addition showed a wide morphologic variation of the shell. Ten summit sediment samples were recovered with the purpose of carrying out a census of the Foraminifera population. These Foraminifera presented a remarkable variation in the form of the shells, illustrating the reason why they have been determined like Cassidulinoides parkerianus by some authors. Its distribution is restricted to the south of the Antarctica convergence: Ross and Weddel Seas and Bransfield Strait.