none
Geological Time:
holotype
View of a specimen of Assilina formosensis Hanzawa, 1931
The identification is based upon:
, : Hanzawa, S. (1931). Notes on some Eocene Foraminifera found in Taiwan ( Formosa ) , with remarks on the age of the Hori slate formation and Crystalline schists. Science reports of the Tohoku Imperial University. 2nd series, Geology. 12 (2A): 171 - A12. Plate , Fig.