Annals of the South African Museum: Annale Van Die Suid-Afrikaanse Museum, Volume 106 |
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Page 99
Sutures initially indistinct , flush , later becoming distinct , depressed , with the spiral suture almost horizontally aligned . Aperture interio - marginal , at the base of the final chamber , in form apparently a low elongate slit ...
Sutures initially indistinct , flush , later becoming distinct , depressed , with the spiral suture almost horizontally aligned . Aperture interio - marginal , at the base of the final chamber , in form apparently a low elongate slit ...
Page 134
Sutures generally distinct ; in initial part of test raised , limbate and regularly curved ; in uncoiled part they are strongly limbate and raised centrally , but weakly raised to flush near to both the ventral and dorsal margins .
Sutures generally distinct ; in initial part of test raised , limbate and regularly curved ; in uncoiled part they are strongly limbate and raised centrally , but weakly raised to flush near to both the ventral and dorsal margins .
Page 241
Dorsal sutures generally distinct in the later part of the test , weakly raised , limbate , curved to almost straight ... generally with the last two or three becoming distinct , radiate , weakly depressed , curved or sinuous .
Dorsal sutures generally distinct in the later part of the test , weakly raised , limbate , curved to almost straight ... generally with the last two or three becoming distinct , radiate , weakly depressed , curved or sinuous .
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abundant Albian Algoa Basin Ammobaculites apertural appears Argentina assemblages Astacolus Barremian Bartenstein & Brand base Biozone Bb borehole chambers Clay close coil Colchester core Cretaceous depressed described distinct Dorothia dorsal Early Hauterivian environments Epistomina Espitalié & Sigal examples facing feet Figure final foraminifera genus grey claystone Haplophragmoides Holotype illustrated inflated initial interval Kimmeridgian Lagena Late Hauterivian Biozone Late Valanginian Biozone later Lenticulina lignite Lingulina localities lower Magniez-Jannin margin Masiuk McLachlan McLachlan et al middle Mngazana Nodosaria Occasional occur offshore ornamentation outcrop sample Paratype periphery Pletmos possess present probably rare referred Reinholdella Remarks Reuss ribs Roemer rounded seen shallow shelf shell side view similar SOEKOR South Africa southern species specimens Stratigraphic range studied Sundays River Formation surface sutures Tappan Uitenhage upper usually ventral weakly whorl wide Zone