. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. D U. Fig. 32. Suture lines of the lineage B. yokoyamai (E, D), B. capensis (C), B. sulcatus (B), and B. vanhoepeni (A) in Zululand to illustrate increasing sutural complexity. Scale bar for size. The third identifiable lineage consists of smooth Baculites with extremely complex sutures. This includes B. hochstetteri Liebus, 1902 (Fig. 33A-B), B. rex, B. chicoensis (Fig. 34A-D) and B. rectus (Fig. 33C). This is in part Ward's (1978) 'lytoceratine' group. Unfortunately, the relationship of these specie
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. D U. Fig. 32. Suture lines of the lineage B. yokoyamai (E, D), B. capensis (C), B. sulcatus (B), and B. vanhoepeni (A) in Zululand to illustrate increasing sutural complexity. Scale bar for size. The third identifiable lineage consists of smooth Baculites with extremely complex sutures. This includes B. hochstetteri Liebus, 1902 (Fig. 33A-B), B. rex, B. chicoensis (Fig. 34A-D) and B. rectus (Fig. 33C). This is in part Ward's (1978) 'lytoceratine' group. Unfortunately, the relationship of these species is far from clear. All have an extremely dendritic suture line with narrow-stemmed saddles and lobes. In B. rex and B. chicoensis the incisions of the lobes and saddles appear to be predominantly pointed, 'lytoceratine' in the sense of Ward (1978). In contrast, the sutures of B. hochstetteri and B. rectus are more rounded 'phylloid'. This would suggest that this is not a homogeneous group, but rather a grouping of convergent taxa, but we cannot be sure. The origins of this group are uncertain. Matsumoto & Obata (1963: 102, text-fig. 218) suggested derivation from B. bailyi and B. uedae (which we. 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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