Biology:Triloculina

From HandWiki
Short description: Genus of single-celled organisms


Triloculina
Temporal range: Jurassic–Recent
Scientific classification
Domain:
Eukaryota
(unranked):
(unranked):
Superphylum:
Phylum:
Class:
Tubothalamea
Order:
Superfamily:
Family:
Subfamily:
Genus:
Triloculina

d'Orbigny 1826

Triloculina is a genus of foraminifera in the order Miliolida, included in the Quinqueloculininae. The test[clarification needed] is three, chambers each a half coil in length. Early chambers, at least in the microspheric generation, in quinqueloculinan arrangement, later becoming triloculine with successive chambers added in planes 120 degrees apart. Only the final three chambers are visible externally. The aperture is terminal, at the end of the final chamber, with a bifid tooth in adult forms. As with the entire order, the test is composed of imperforate, porcelaneous calcite.

The Pliocene to Recent Cruciloculina is very similar, except for having a different aperture, and is a likely derivative.

References

Wikidata ☰ Q7842067 entry