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Subspecies Turborotalia pseudoampliapertura sinaiensis | ||||||
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| Diagnosis / Definition: | ||||||
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Haggag & Luterbacher (1995): Description : Test generally small, nonumbilicate, biconvex; umbihcal side more strongly convex than spiral one ; equatorial periphery lobate, in axial view periphery rounded with distinct dorso-peripheral shoulder. Three tightly coiled whorls with approximately 13 chambers; 3 1/2 to 4 chambers of the last whorl increasing rapidly in size as added. Sutures deeply incised, radial on umbilical side, slightly curved on spiral side. Aperture a high arch with distinct lip. Surface coarsely perforate. Diameter : 125-235 µm. |
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| Discussion / Comments: | ||||||
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Haggag & Luterbacher (1995): Remarks : The specimens illustrated by Haggag (1990, pl. 1, fig. 25, 27) as Globigerina cf. ampliapertura belong to T. pseudoampliapertura sinaiensis. Slightly variable characters in this subspecies are the height of the spiral side, the width of the last chamber, the shape of the dorso-peripheral shoulder, and the shape of the apertural arch which varies from symmetrical to slightly asymmetrical. The new subspecies differs from T. pseudoampliapertura pseudoampliapertura in having a smaller, more delicate nonumbilicate test, more strongly depressed sutures and a more coarsely perforate surface. T. pseudoampliapertura sinaiensis n. subsp, has been compared with topotypes of Globigerina ampliapertura BOLLI, 1957 kindly provided by its author. It differs from this species in having a more distinct dorso-peripheral shoulder, more laterally compressed chambers in the last whorl and a more finely perforated surface. The early ontogenetic portion of the tests indicates different ancestors (see also Blow and Banner, 1962 ; Blow, 1979). |
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| Synonym list: | ||||||
| Haggag & Luterbacher (1995): 1989 Turborotalia pseudoampliapertura Blow & Banner. - Haggag : pl. 1; fig. 30
1995 Turborotalia n spp. pseudoampliapertura sinaiensis . - Haggag & Luterbacher : p.47 pl. 3; fig. 1-4
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| References: | ||||||
Haggag,M.A.Y.. (1989): Haggag,M.A.. and Luterbacher,H. (1995): |
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| Anonymous: Unedited TaxonConcept data | ||||||
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Taxon relations
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