''Streptocyclammina'' is a genus of benthic

foram Foraminifera (; Latin for "hole bearers"; informally called "forams") are single-celled organisms, members of a phylum or class of amoeboid protists characterized by streaming granular ectoplasm for catching food and other uses; and commonly an ...

s with a flattened test from the Jurassic. The test (or shell) usually starts off streptospiral (coiled irregularly) hence the name, and becomes planispiral in the mature stage. Chambers are numerous per whorl, whorls become rapidly larger in peneropline fashion (as common in '' Pereroplis''). Sutures between whorls are slightly indented, the periphery rounded. The wall is finely agglutinated, externally imperorate, internally with massive septa perforated by numerous apertures. ''Streptocyclammina'' has been found in Jurassic sediments in Morocco, Italy, and the Balkans. ''

Spiraloconulus ''Spiraloconulus'' is a genus of middle Jurassic foram Foraminifera (; Latin for "hole bearers"; informally called "forams") are single-celled organisms, members of a phylum or class of amoeboid protists characterized by streaming granula ...

'' and ''

Timidonella ''Timidonella'' is a genus of large middle Jurassic forams, with microspheric tests up to in diameter. Smaller megalospheric tests may be fan-shaped or kidney-shaped to discoidal with breadths to slightly over 2 mm and a constant thicknes ...

'' are other spirocyclinids from the same general region, but are limited to the middle Jurassic.

References

* ''Streptocyclammina'' in GSI Paleontolog

{{Taxonbar, from=Q22286754 Loftusiida Prehistoric Foraminifera genera Jurassic life