 Hornibrook et al. 1989, Fig. 30.5a-c: 0.41 mm |
Reference: Hornibrook, Brazier & Strong 1989, p.134, Fig. 30:5a-c.
Synonymy: 1962, Tohoku Univ. sci. rep. ser. 2 (geol.), spec. vol. no. 5: 81, 82, pl. 28, fig. 11, 12;
1976, Hornibrook, Progress in Micropaleontology, pp. 83-102;
1981, Hornibrook, N.Z. jl. geol. geophys. 24(2): 276, 267;
1982, Ibid 25: 94, 95;
1983, G. (Truncorotalia) tosaensis, Kennett & Srinivasan, Neogene Planktonic Foraminifera, p. 148, pl. 34, fig. 1-3, text-fig. 16.
Description: Typically planoconvex, with involute side gently rounded, unkeeled, umbilicate, five chambers in final whorl, sutures gently recurved, aperture a very low arch, surface finely perforate and weakly pustulose.
Comparison: Distinguished from G. crassaformis by having an extra chamber in the last whorl.
Distribution: Mangapanian to Nukumaruan in New Zealand on land sequences.
Comment: Populations in the Upper Pliocene contain morphotypes of early G. truncatulinoides which replaces G. tosaensis in the Pleistocene (see Hornibrook 1976).
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.
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