|Daughter taxa: (blue => in age window 0-800Ma)|
Type 1 - spines only on AACs, CFCs with flat top
Type 2 - spines on all BCs, CFCs with pointed top.
Type 3 - BCs with large perforations, CFCs with low point. This is almost certainly a distinct species.
Distinguishing features: Like S. molischii HOL but with prominent, oblique perforations, often conical; CFCs with arched process
Farinacci & Howe catalog pages: A. periperforata *
Morphology: Like A. fragaria, but BCs with large, anticlockwise-oblique, elongate, pores at base of dome, ca 1.5 µm long. CFCs with medium-sized arched process (ca 1.5 µm). The body coccoliths are unusual in showing strong and consistent chirality.
Size: BCs ca 1.5 µm long
|Tags||LITHS: holococcolith, elliptical, cylindrical, hollow, CA: grill, pores, closed, |
CSPH: equant, elongated, CFC,
|Metrics||Lith size: 0.9->1.5µm; Coccosphere size: 5->7µm; Liths per sphere: 70->100|
Data source notes: morphom data from Cros & Fortuño (2002) & Kleijne 1991
Last occurrence (top): Extant Data source: present in the plankton (Young et al. 2003)
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in stage). Data source: [JRY rough estimate]
Plot of occurrence data:
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