. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. UPPERMOST ALBIAN AMMONITES FROM THE ANGOLAN LITTORAL 273 V. Fig. 64. Mortoniceras {Durnovarites) perinflatum (Spath). The holotype of Ditrnovarites spinosus van Hoepen, SAM-D3154, from the Upper Albian of the Mzinene Formation, Zululand. x 1. whorls. The differences appear to be those between individuals, and the Texas species is considered to be referable to M. (D.) perinflatum. Mortoniceras (Durnovarites) depressum (Spath) was said to differ from M. (D.) quadratum in its far more depressed whorl section, with rounde
. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. UPPERMOST ALBIAN AMMONITES FROM THE ANGOLAN LITTORAL 273 V. Fig. 64. Mortoniceras {Durnovarites) perinflatum (Spath). The holotype of Ditrnovarites spinosus van Hoepen, SAM-D3154, from the Upper Albian of the Mzinene Formation, Zululand. x 1. whorls. The differences appear to be those between individuals, and the Texas species is considered to be referable to M. (D.) perinflatum. Mortoniceras (Durnovarites) depressum (Spath) was said to differ from M. (D.) quadratum in its far more depressed whorl section, with rounded instead of parallel flanks. It closely approaches M. (D.) postinflatum and may, therefore, be no more than an extreme variant of M. (D.) perinflatum. Occurrence Mortoniceras (Durnovarites) perinflatum is known from the uppermost Albian of Switzerland, Poland, southern England, Sardinia, Texas, Nigeria and Angola. The authors have also seen comparable material from Zululand. Mortoniceras (Durnovarites) subquadratum Spath, 1933 Figs 62A-C, 65C-D ? Subschloenbachia meunieri Spath, 1922: 115. ? Mortoniceras {Durnovarites) meunieri (Spath), Spath 1932: 399. Mortoniceras {Durnovarites) subquadratum Spath, 1933: 435, pi. 42 (fig. 5), pi. 43 (fig. 1), pi. 44 (fig. 6), pi. 45 (fig. 5), pi. 47 (figs 2-4), pi. 48 (fig. 2). Reyment, 1955: 38. Dieni & Massari, 1963: 798. Wiedmann & Dieni, 1968: 142, pi. 13 (fig. 9), fig. 90. Renz, 1968: 55, pi. 7 (figs 8, 10), pi. 10 (figs \-A, 7-8), fig. nfr-f,. Marcinowski & Naidin, 1976: 110, pl. 6 (fig. 3). Mortoniceras {Durnovarites) subquadratum var. tumida Spath, 1933: 435, pl. 48 (fig. 4). Wiedmann & Dieni, 1968: 143, pl. 13 (fig. 10), fig. 91. Mortoniceras {Durnovarites) subquadratum var. crassicostata Spath, 1933: 432, pl. 42 (fig. 9). ? Mortoniceras {Pervinquieria) sp. juv., Spath, 1933: 412, pl. 41 (fig. 7). ? Pervinquieria {Cantabrigites ?) subnana Breistroffer, 1947: 91. Pervinquieria {Durnovarites) subquadrata (Spath) Breist
Size: 1137px × 2198px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorsouthafr, bookcentury1800, bookdecade1890, bookyear1898
