. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 14 ANNALS OF THE SOUTH AFRICAN MUSEUM areas of Zululand north of the Richards Bay BH-9 borehole. In the Campanian I, cytherellid populations make up 10-20 per cent of the total fauna and this rises in Campanian II: 20-35 per cent (Richards Bay borehole) to —20 per cent (at outcrop farther north). Campanian III ostracod faunas are also about 20 per cent cytherellid, but this increases rapidly in Campanian IV, V, and lower Maastrichtian I to reach levels up to 50 per cent, falling to 20-30 per cent in
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 14 ANNALS OF THE SOUTH AFRICAN MUSEUM areas of Zululand north of the Richards Bay BH-9 borehole. In the Campanian I, cytherellid populations make up 10-20 per cent of the total fauna and this rises in Campanian II: 20-35 per cent (Richards Bay borehole) to —20 per cent (at outcrop farther north). Campanian III ostracod faunas are also about 20 per cent cytherellid, but this increases rapidly in Campanian IV, V, and lower Maastrichtian I to reach levels up to 50 per cent, falling to 20-30 per cent in Maastrichtian II. As will be noted in the discussion section, these fluctuations are directly related to changes in the palaeosedimentary environments. E Z CYTHERELLA om. Fig. 4. Distribution of Cytherella sp. in Campanian-Maastrichtian strata of Zululand and Agulhas Bank. A. Total number of valves. B. Percentage of total ostracod population. C. Morphotypes 1-4 as percentage of total Cytherella sp. plotted by ostracod assemblage. The family is represented in the Campanian-Maastrichtian by 3 genera: Cytherella, Cytherelloidea, and Platella with 5 designated species and 4 mor- photypes. 2 of the species and all 4 morphotypes are inherited from the Santonian, whilst 1 species is restricted to the Campanian {Cytherelloidea griesbachi), and 2 are restricted to the Campanian-Maastrichtian (Cytherelloidea mfoloziensis and Platella africana).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
