This article relies largely or entirely on a single source. (September 2023) |
Spiraloconulus is a genus of middle Jurassic forams with a coarsely agglutinated, microgranular, calcareous wall. The test is large, conical to cylindrical, coiled somewhat straight; the early coiled stage results in a flattened apex. Distinctly coiled microspheric tests are as much as 2 mm wide and 1.6 mm high. Megalospheric tests are smaller, up to 1.5 mm high and 1.1 mm wide.
| Spiraloconulus Temporal range: Middle Jurassic
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| Genus: | Spiraloconulus Allemann and Schroeder, 1980
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Spiraloconulus is known from the middle Jurassic of France, Italy, Sardinia, and Arabia. Timidonella is another spirocyclind from the same time, but with a wider distribution.
References
edit- Spiraloconulus page in GSI Foraminifer e-book.[1]