. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. mfoloziensis. agulhasensis Fig. 7. Sketches of Cytherelloidea species, right valves, with positive features shaded. A. C. umzambaensis Dingle, 1969, Richards Bay borehole, Zululand, Santonian III (from Dingle 1980, fig. 3a). B. C. mfoloziensis Dingle, 1981, SAM-K5665, Mfolozi River, Zululand, Maas- trichtian II. C. C. agulhasensis Dingle, 1971, SAM-PC6020, Agulhas Bank, Upper Aptian- Albian. Scale bars = 300 /n. progressively increase in length ventrally: the dorsal rib is very short and slightly con
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. mfoloziensis. agulhasensis Fig. 7. Sketches of Cytherelloidea species, right valves, with positive features shaded. A. C. umzambaensis Dingle, 1969, Richards Bay borehole, Zululand, Santonian III (from Dingle 1980, fig. 3a). B. C. mfoloziensis Dingle, 1981, SAM-K5665, Mfolozi River, Zululand, Maas- trichtian II. C. C. agulhasensis Dingle, 1971, SAM-PC6020, Agulhas Bank, Upper Aptian- Albian. Scale bars = 300 /n. progressively increase in length ventrally: the dorsal rib is very short and slightly convex dorsally, the middle rib is concave dorsally with a small cusp just in front of the valve mid-length and has a small posterior swelling, and the ventral rib is concave dorsally and curves upward posteriorly to partially enclose the two other ribs. The rest of the valve surface is smooth. Internal features. None seen. Remarks C. ndumuensis has a rather unusual outline and distinctive rib pattern, which sets it aside from other species of the genus in southern Africa. Dimensions (mm) length height 6022 0,63 0,41 Age and distribution Known only from the Cenomanian II of northern 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
