 Hornibrook et al. 1989, Fig. 18.16: 0.45 mm. |
Reference: Hornibrook, Brazier & Strong 1989, p.100, Fig. 18:16.
Synonymy: 1884, Bolivina tortuosa, Rep. Voy. Challenger zool. 9: 420, pl. 52, fig. 31-34;
1937, Cushman, Spec. publ. Cushman Lab. 9: 133-135, pl. 17, fig. II-21;
1961, Hornibrook, N.Z. Geol. Surv. paleont. bull. 34(1): 71, pl. 10, fig. 191;
1982, Sigmavirgulina tortuosa, AGIP, Foraminiferi padani, 2nd Ed.: pl. 31, fig. 7.
Description: Distinguished by its broad, triangular shape and spirally twisted test. Differs from S. tortuosa in having a double row of prominent knobs on the inner ends of the chambers.
Distribution: Duntroonian to Altonian.
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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