. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. CRETACEOUS FAUNAS FROM ZULULAND AND NATAL, SOUTH AFRICA A NEW SEXTUBERCULATE TEXANITID By Herbert Christian Klinger South African Museum, Cape Town* & William James Kennedy Geological Collections, University Museum, Oxford (With 7 figures) [MS. accepted 20 May 1980] ABSTRACT Plesiotexanites (Eutexanites) sextuberculatus sp. nov. from the Lower Santonian of Zululand is described. Ornament and ontogeny are basically that of Plesiotexanites, except that a sixth row of tubercles is added through divi
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. CRETACEOUS FAUNAS FROM ZULULAND AND NATAL, SOUTH AFRICA A NEW SEXTUBERCULATE TEXANITID By Herbert Christian Klinger South African Museum, Cape Town* & William James Kennedy Geological Collections, University Museum, Oxford (With 7 figures) [MS. accepted 20 May 1980] ABSTRACT Plesiotexanites (Eutexanites) sextuberculatus sp. nov. from the Lower Santonian of Zululand is described. Ornament and ontogeny are basically that of Plesiotexanites, except that a sixth row of tubercles is added through division of the original umbilical row. The sextuberculate ornament is unique amongst the ammonite subfamily Texanitinae, but appears to have been an evolutionary cul-de-sac. Introduction .... 321 Systematic description . 322 Acknowledgements . . 330 References 330 INTRODUCTION Subsequent to the authors' (Klinger & Kennedy 1980) monographical description of the southern African representatives of the ammonite subfamily Texanitinae Collignon, 1948, an as yet undescribed form was discovered in the course of routine curatorial duties and fieldwork. This new form differs from all known texanitine material in possessing six rows of tubercles in the adult stage, and merits description as a new subgenus and species of the genus Plesio- texanites Matsumoto, 1970. * Present address: Institut und Museum fur Geologie und Palaontologie, Ann. S. Afr. Mus. 82 (8), 1980: 321-331, 7 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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