''Semirosalina'' is a genus of foraminifera from the Lower Miocene of New Zealand, related to '' Rosalina'', included in

discorbacea Discorbacea, Discorboidea in recent taxonomies, is a superfamily of foraminifera, Loeblich and Tappan,1988Forminiferal Genera and their Classification (testate protists), with a range extending from the Middle Triassic to the present, characteri ...

n 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

Alfred R. Loeblich Jr Alfred R. Loeblich Jr (1914–1994) was an American micropaleontologist. He was married to Helen Niña Tappan Loeblich and the two co-authored a number of important works on the Foraminifera and related organisms. Biography Alfred R. Loeblich Jr ...

Helen Tappan Helen may refer to: People * Helen of Troy, in Greek mythology, the most beautiful woman in the world * Helen (actress) (born 1938), Indian actress * Helen (given name), a given name (including a list of people with the name) Places * Helen, G ...

, 1988. Forminiferal Genera and their classification. Geological Survey of Iran, (e-book) 2005

{{Taxonbar, from=Q7449654 Rosalinidae Rotaliida genera