Hannatoma I: Seca Fm: SW Ecuador (Stone) (Eocene of Ecuador)

Where: Ecuador (2.3° S, 80.8° W: paleocoordinates 4.8° S, 73.7° W)

• coordinate based on nearby landmark

When: Seca Formation, Late/Upper Eocene (37.2 - 33.9 Ma)

Environment/lithology: marine

Size class: microfossils

Collection methods: Faunal correlations were made by Mr. A. Martinez of the International Petroleum Oil Company.

Primary reference: J. W. Durham, A.N. Dusenbury, Jr, H.D. Hedberg, L. Kehrer, J.G. Marks, R.M. Stainforth, and B. Stone. 1949. The age of the Hannatoma mollusk fauna of South America; a symposium. Journal of Paleontology 23(2):145-160 [L. Ivany/C. Visaggi/C. Visaggi]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 42812: authorized by Linda Ivany, entered by Christy Visaggi on 05.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Ellipsonodosaria
  - Ellipsoidinidae
Hastigerinella
  -
Rotaliina
 Planorbulinacea - Planulidae
 Buliminacea - Buliminidae
 Discorbacea - Bagginidae
 Rotaliina - Bolivinidae
Hantkenina
  -
Stichocassidulina
  -
Lagenina
 Nodosariacea - Nodosariidae
Robulus chiranus Cushman and Stone 1947
Plectofrondicularia
  -