CATALOG OF ORIGINAL DESCRIPTIONS: Hastigerinella riedeli Rögl & Bolli 1973
This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.
Higher levels: pf_cat -> H -> Hastigerinella -> Hastigerinella riedeli
RoglBolli73-f5 pl4 f2.JPG
RoglBolli73-pl14 f1-3.JPG
RoglBolli73-pl4 f1-5.JPG
Hastigerinella riedeli
Current identification/main database link: Orcadia riedeli (Rögl & Bolli, 1973)
Original Description
Size:
Extra details from original publication
Dimensions (paratypes): Diameter 0.088-0.182 mm; height of spire 0.052-0.126 mm; average diameter 0.141 mm; average height of spire 0.084 mm.
Number of chambers (paratypes): 10-17, average 12.16.
The variability of the species is largely restricted to the test size and the number of chambers, which are arranged in two to two and a half, exceptionally, three whorls. High spired specimens are rare. The five chambers of the last whorl are distinctly larger and are on a lower plane than those of the inner portion (Plate 4, Figures 3 and 5). This is caused by a streptospiral arrangement of chambers, which is also apparent in the position of the apertures (Plate 4, Figure 4; Plate 14, Figure 3).
Remarks: The species is placed in Hastigerinella because of its spine development and also because of the slight tendency to streptospiral coiling. The concentration of the spines at the distal ends of chambers is also typical for the genus. The new species is close to Hastigerinella rhumbleri Galloway, which has a similar arrangement of spines, but differs from it in the much smaller size. Hastigerinellar humbleri is not present in Site 147. Occasionally specimens may have a reduced final chamber showing that the end of growth has been reached. The species differs from five chambered Globigerinas such as Globigerina quinqueloba in the robust triangular spines concentrated at the distal end of chambers and in the mode of coiling.
Distribution: The species is present throughout the section of Site 147, from the Globorotalia hessi to the Globorotalia fimbriata Subzone of the Globorotalia truncatulinoides truncatulinoides Zone, Pleistocene to Holocene.
References:
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Hastigerinella riedeli compiled by the pforams@mikrotax project team viewed: 17-12-2025
Short stable page link: https://mikrotax.org/pforams/index.php?id=131713 Go to Archive.is to create a permanent copy of this page - citation notes |
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