. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 24. External sutures of: A. Kossmaticeras (Karapadites) karapadensis (Kossmat, 1897), BMNH C83328; B. Kossmaticeras (Karapadites) planissimus Collignon, 1966, SAS KK105B. Both x 2. Description The material available is generally well preserved and in the form of both moulds and specimens retaining the original aragonitic shell. SAS Z1954 shows the early growth stages, at a diameter of 18,5 mm (Fig. 23A-B). The coiling is moderately involute (48 per cent of the previous whorl is covered), the who
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 24. External sutures of: A. Kossmaticeras (Karapadites) karapadensis (Kossmat, 1897), BMNH C83328; B. Kossmaticeras (Karapadites) planissimus Collignon, 1966, SAS KK105B. Both x 2. Description The material available is generally well preserved and in the form of both moulds and specimens retaining the original aragonitic shell. SAS Z1954 shows the early growth stages, at a diameter of 18,5 mm (Fig. 23A-B). The coiling is moderately involute (48 per cent of the previous whorl is covered), the whorl section depressed (whorl breadth to height ratio is 1,1). Ornament consists of umbilical bullae only on the internal mould (the shell is not preserved at this diameter). There are four to five strong constrictions per half whorl. They are broad, deep, prorsiradiate, straight on the flanks, and pro- jected forward over the ventro-lateral shoulders into a narrowly rounded ventral convexity. Each has a narrow rib on the adapertural side, and this is followed by a second, shallower constriction. A highly distinctive growth-stage follows this and extends to the beginning of the outer whorl at an estimated diameter of 60 mm. The umbilicus is thus shallow, the umbilical wall slopes outward and is flattened, with an abruptly rounded umbilical shoulder. All those parts of the flanks not. 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
