This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.

Higher levels: pf_cat -> N -> Nonion -> Nonion iota
Other pages this level: N. danvillensis, N. iota, N. micrus, N. wilcoxensis,

Nonion iota

Citation: Nonion iota Finlay 1940
Rank: Species
Type locality: 5300 - Moeraki S.D., soft white marl at S. end of beach (McKay's marly clay). New Zealand
Type age: Type from 5300, Upper Bortonian. Index of Lower Bortonian (5570) to Kaiatan.
Holotype Repository: Washington; USNM

Linked specimens: USNM-689078

Current identification/main database link: Pseudohastigerina micra (Cole 1927)

Original Description
"Very similar to N. micrum Cole and danvillense Howe and Wallace (see Cushman, U.S.G.S., Prof. Paper, No. 191, p.5, pl. 1, figs. 19-22, 1939); same small size and deep sutures as danvillense, but with the fewer chambers of micrum; more inflated chambers than either, leading to more lobulate periphery and more sunken umbilical area each side; shell usually more compressed with rounded periphery.

Size: Size, 0.25 mm.

Editors' Notes
original combination not double checked


Finlay, H. J. (1940). New Zealand foraminifera: Key species in stratigraphy - no. 4. Transactions of the Royal Society of New Zealand. 69(4): 448-472. gs


Nonion iota compiled by the pforams@mikrotax project team viewed: 4-4-2020

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