Planispirillinidae

Planispirillinidae is a family of foraminifera, which are single-celled protists with shells. They are part of the order Rotaliida, and are characterized by their planispiral shell structure.

Overview[edit | edit source]

The family Planispirillinidae was first described by Alfred R. Loeblich Jr and Helen Tappan in 1961. The family includes several genera, such as Planispirillina, Planispirillina (Planispirillina), and Planispirillina (Planispirillina).

Planispirillinidae are found in marine environments and are particularly abundant in the Cretaceous period. They are benthic foraminifera, meaning they live on or in the sea floor.

Shell Structure[edit | edit source]

The shell of Planispirillinidae is planispiral, meaning it is coiled in a flat spiral. The shell is typically composed of calcite, and can be either involute or evolute. Involute shells have the outer whorl covering the earlier whorls, while evolute shells have all whorls visible from the top.

Genera[edit | edit source]

The family Planispirillinidae includes the following genera:

References[edit | edit source]

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