Idalina

Idalina
Temporal range: Late Cretaceous
Scientific classification
Domain: Eukaryota
Kingdom: Rhizaria
Superphylum: Retaria
Phylum: Foraminifera
Order: Miliolida
Family: Hauerinidae
Genus: Idalina
Schlumberger and Munier-Chalmas, 1884

Idalina is a foraminiferal genus included in the Hauerinidae, (Miliolida), that lived during the latter part of the Late Cretaceous.

The adult test is ovoid to fusiform . Ontogeny goes through an early quinqueloculine stage immediately following the proloculus, followed in sequence by triloculine and biloculine stages and finally to an adult stage with completely enveloping chambes. Wall, calcareous, imperforate, porcelaneous. Chambers with complete floors. Aperture in quinqueloculine and triloculine stages with a simple tooth. Aperture in adult stage, terminal, radially cribrate, with a convex trematophore (sieve plate) pierced by numerous irregular openings.

Loeblich and Tappan, (1988) include Idialina in the miliolid family Hauerinidae. Prior to, it was included in the Treatise (Loeblich and Tappan, (1964)), in the miliolid subfamily Miliolinae, which also includes the genus Hauerina. Idalina is known from the Upper Cretaceous (Senonian) of France.

References

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