. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . om Bed V, and SAM-PCA1857, 1870, 1873, 1882and 1902 from Bed IV. None are complete but, where uneroded, they preserverecrystallized test. Description In SAM-PCA 1870, the best-preserved individual (Fig. 3F-G), the shell is somewhatinflated and involute, with about 60 per cent of the preceding whorl covered. Theumbilicus is narrow (21-26 per cent of the diameter), deep, with a vertical umbilical walland evenly rounded umbilical shoulder. The flanks are slightly convex and converge tothe broad, evenly rounded venter.
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . om Bed V, and SAM-PCA1857, 1870, 1873, 1882and 1902 from Bed IV. None are complete but, where uneroded, they preserverecrystallized test. Description In SAM-PCA 1870, the best-preserved individual (Fig. 3F-G), the shell is somewhatinflated and involute, with about 60 per cent of the preceding whorl covered. Theumbilicus is narrow (21-26 per cent of the diameter), deep, with a vertical umbilical walland evenly rounded umbilical shoulder. The flanks are slightly convex and converge tothe broad, evenly rounded venter. The whorl section is semicircular, varying fromsomewhat depressed to as wide as high (H/W = ). Ornament is lacking save for growth striae and 5-6 constrictions per whorl, eachbacked by a low collar. The constrictions are strongly prorsiradiate, almost straight acrossthe flanks, and reflex at the ventrolateral shoulders to cross the venter transversely, with ashallow adorally-concave sinus. UPPER CRETACEOUS (TURONIAN-CONIACIAN) AMMONITES FROM SAO NICOLA U, ANGOLA 97.
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
