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| Anonymous: Unedited TaxonConcept data | ||||||
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Subspecies Globigerinita stainforthi praestainforthi Blow 1969 | ||||||
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| Diagnosis / Definition: | ||||||
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Blow (1969): Description of holotype: The small test consists of about 9-10 chambers coiled in a low trochospire with 4 1/2 chambers in the final whorl. The first chamber of the last whorl and the umbilical depression is covered by a low, not inflated, broad bulla. The primary chambers are moderately embracing but the intercameral sutures are distinct and moderately incised. The ventral intercameral sutures are radial but the dorsal intercameral sutures are slightly curved. The bulla is broad and not inflated and does not bear any tube-like extensions along the ventral intercameral sutures. The infralaminal apertures are small, very low slit-like openings directly in line with the ventral intercameral sutures of the primary chambers. The wall is calcareous, radial hyaline [62a], comparatively densely, but not coarsely perforate, with small pustules. The pores do not open into distinct pits. Maximum diameter of holotype 0.28 mm. |
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| Discussion / Comments: | ||||||
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Blow (1969): Remarks: G. stainforthi praestainforthi differs from G. stainforthi stainforthi in having a less complex, less inflated bulla and less closely appressed primary chambers. The spire of praestainforthi is a little more distinctly and highly trochoid than in G. stainforthi stainforthi but this difference is small. The primary intercameral sutures are more incised in praestainforthi as compared to stainforthi (s.s.). The wall texture of G. stainforthi stainforthi is more coarsely perforate than in praestainforthi and the former taxon has distinct surface pits into which the pores open. In G. stainforthi stainforthi there is very little difference between the wall texture (and ?structure) of the complex bulla and the primary chambers but in G. stainforthi praestainforthi there is a noticeable difference in texture, at least, between the wall of the bulla and the wall of the primary chambers. G. stainforthi praestainforthi differs from G. incrusta AKERS in possessing less globular primary chambers, a lower trochospire and a broader bulla. The wall of G. incrusta is thin, delicate and very finely perforate. Stratigraphical Range: The taxon ranges from the later parts of Zone N. 2 to within the early part of Zone N.5; it is especially common in the sediments of deep-sea cores. The holotype comes from a sample now taken as the new co-type locality of the Globorotalia kugleri zone (sensu BOLLI), Mosquito Creek, opposite Milepost 38, southern Trinidad. This sample is referable to Zone N.4 as emended. |
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| Synonym list: | ||||||
| Blow (1969): 1969 Globigerinita stainforthi praestainforthi Blow. - Blow : p.383 pl. 25, figs. 3-5
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| References: | ||||||
Blow,W.H. (1969): |
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| Anonymous: Unedited TaxonConcept data | ||||||
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