Heterophrys

 

 

Heterophrys spec.

 

This species resembles strongly Chlamydaster laciniatus as described by Rainer (1968). In most of my samples it is a common species. In normal light the cell body seems to be covered with a layer of mucus with a serrated edge. In fact this layer contains a large number of very fine needles or spines, with are obliquely set, thus giving the appearance of an X or reversed V. These needles are only visible at high magnification in phase contrast or DIC.

 

Cell in phase contrast (Olympus UPlanFL100X)
Heterophrys
Heterophrys
Cell in DIC with the nucleus visible. The cell contracts at once its axopods when disturbed, e.g. by a shock. Shortly afterwards the axopods are stretched again.