The diagram shows some examples of one group of microstructures observed
in foram tests. Can you name the test type, and the group/s of forams
with which it is associated?
These are the advanced microgranular tests. Note the more complex pore structures. These diagrams represent structures observed in many groups of forams - Globeriginiids, Spirilliniids, Involutiniids, and Robertiniids. Similar structures have arisen in other groups too, including more derived members of the Textulariida.