 Hornibrook et al. 1989, Fig. 23.10 (after Collen): 0.23 mm |
Reference: Hornibrook, Brazier & Strong 1989, p.94, Fig. 23:10 (after Collen).
Synonymy: 1873, Nautilus balthicus, Einleitung in die Conchyliekenntniss nach Linne: 20, pl. 1, fig. 2;
1974, Collen, N.Z. jl. geol. geophys. 17(4): 907-912, fig. 1-4.
Description: Minute, planispiral, partially evolute, walls translucent, finely perforate, aperture extending backwards on both sides as small slits beneath small umbilical flaps.
Distribution: Found only in the Waipipian in the Wanganui and East Coast North Island Basins.
Comment: H. balthica in the Mediterranean Pleistocene Calabrian Stage is somewhat larger, with a more subacute periphery. Long regarded as a cold water form and index species for the basal Pleistocene but since recorded widely from Late Miocene to Recent.
Cite this publication as: "Strong CP, Raine JI, Terezow M. 2018. Key
species of New Zealand fossil foraminifera: descriptions from "Manual of New
Zealand Permian to Pleistocene Foraminiferal Biostratigraphy" by Hornibrook,
Brazier and Strong, 1989. Lower Hutt (NZ): GNS Science. (GNS Science
miscellaneous series; 123)."
ISSN 1172-2886, ISBN 978-1-98-853088-8,
DOI 10.21420/G2M63W.
This publication is © copyright in 2018 by GNS Science and is licenced for re-use under a Creative Commons Attribution 4.0 International Licence. Please note that this licence does not apply to any included logos, emblems or trade marks.