Semirosalina

Semirosalina
Temporal range: Lower/Early Miocene
Scientific classification
Domain: Eukaryota
Kingdom: Rhizaria
Superphylum: Retaria
Phylum: Foraminifera
Order: Rotaliida
Superfamily: Discorbacea
Family: Rosalinidae
Genus: Semirosalina
Hornibrook. 1961

Semirosalina is a foraminiferal genus from the Lower Miocene of New Zealand, related to Rosalina, included in discorbacean family Rosalinidae. The test is a small trochospiral coil of few whorls with a few subglobular chambers per whorl. The test wall is thin and finely perforate. The aperture at the umbilical margin of the apertural face.

Semirosalina differs from Rosalina in being smaller in size, having fewer chambers, and an inflated rather than a flattened test.

References

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