Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . A B Fig. 2. Tetragonites? heterosukalus Anthula. A. BMNH C78829. B. BMNH 78828. Bothfrom Bed J of the Mzinene Formation, Albian II—III, at locality 171, Mlambongwenya Spruit, northern Zululand. x 1. (1938, pi. 16 (figs 2-5)). E. shoupi Murphy (19676: 22, pi. 3 (figs 7-9)) (Pictet) (1848: 302, pi. 4 (fig. 2a-b)) have straight or flexuous constric-tions, never develop a strong ventral sinus, and have markedly different relativeproportions. The generic affinity of the species is enigmatic. Murphy (19
Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . A B Fig. 2. Tetragonites? heterosukalus Anthula. A. BMNH C78829. B. BMNH 78828. Bothfrom Bed J of the Mzinene Formation, Albian II—III, at locality 171, Mlambongwenya Spruit, northern Zululand. x 1. (1938, pi. 16 (figs 2-5)). E. shoupi Murphy (19676: 22, pi. 3 (figs 7-9)) (Pictet) (1848: 302, pi. 4 (fig. 2a-b)) have straight or flexuous constric-tions, never develop a strong ventral sinus, and have markedly different relativeproportions. The generic affinity of the species is enigmatic. Murphy (1967#, 19676) inthe most recent revision of this species placed it in Tetragonites. Wiedmann (1973)has subsequently referred the species to Eotetragonites because it lacks anumbilical lobe; this divergence reflects the difficulties sometimes encountered inplacing forms in the two genera where differing criteria—sutures vs. form ofconstriction—are used. In consequence the authors have questioned referenceof this species to Tetragonites until a full review of the Tetrag
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
