original description
Finlay, H. J. (1947). New Zealand Foraminifera: Key Species in Stratigraphy - No. 5. <em>New Zealand journal of science and technology.</em> B28: 259-292. [details]
additional source
Loeblich, A. R.; Tappan, H. (1987). Foraminiferal Genera and their Classification. Van Nostrand Reinhold Company, New York. 970pp., available online at https://books.google.pt/books?id=n_BqCQAAQBAJ [details] Available for editors [request]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Diagnosis Test globular to subquadrate, trochospiral, umbilicate, chambers enlarging rapidly in the early whorls, about four to five in the final whorl, sutures radial and depressed, periphery rounded to truncate; wall calcareous, perforate, surface coarsely pitted or cancellate with polygonal ridges, nonspinose; aperture interiomarginal, umbilical, with bordering rim that may become a prominent toothlike flap, those of preceding chambers may be visible within the open umbilicus. M. Eocene to U. Miocene; cosmopolitan. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database