 Hornibrook et al. 1989, Fig. 37.18: 0.81 mm |
 Hornibrook et al. 1989, Fig. 37. Rectuvigerina lineage |
Reference: Hornibrook, Brazier & Strong 1989, p.159, Fig. 37:18.
Synonymy: 1939, Siphogenerina ongleyi, Trans. Roy. Soc. N.Z. 69(1): 111, pl. 13, fig. 42, 43 (Ciperozea).
Description: Short triserial initial part followed by a long uniserial stage. They are typically costate, are round in cross section, and have a tubular lipped aperture with an internal toothplate. Microspheric form mainly triserial, with a few biserial or irregularly uniserial chambers; megalospheric form with reduced triserial stage and two or three uniserial chambers; relatively large and inflated.
Distribution: Waitakian to Taranaki Series.
Comment: Until it can be demonstrated definitely that ongleyi has evolved independently of the more typical species of Rectuvigerina, or is typical of a group of species differing significantly in morphology from Rectuvigerina, there does not seem to be a good case for a separate genus. (The megalospheric form of the very similar Uvigerina seriata Cushman & Jarvis, Cipero Shale, Trinidad, also fits the diagnosis of Rectuvigerina).
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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