Hannatoma J: Zapallo Fm: NW Ecuador (Stone) (Eocene of Ecuador)

Where: Ecuador (0.9° N, 79.9° W: paleocoordinates 1.6° S, 72.8° W)

• coordinate based on political unit

When: Zapallo 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 42868: authorized by Linda Ivany, entered by Christy Visaggi on 06.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Hastigerinella
  -
Rotaliina
 Planorbulinacea - Planulidae
 Buliminacea - Buliminidae
 Rotaliina - Bolivinidae
Hantkenina
  -
 Globigerinaceae - Globigerinidae
Globigerina spp. d'Orbigny 1826
Stichocassidulina
  -
Lagenina
 Nodosariacea - Nodosariidae
Robulus chiranus Cushman and Stone 1947
Plectofrondicularia
  -