Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . Fig. 36. Pamtexanites pseudotricarinatum sp. nov. Var. A Paratype SAS-Z807. Sparsely costate variety, x 0,84. CRETACEOUS FAUNAS FROM SOUTH AFRICA 51 central keel is broad and undulating. This thus gives rise to ornament on theventer comprising a series of rectangles. Ontogeny The holotype (Figs 32-33) is the only specimen with part of the innermostwhorls preserved. The smooth, rounded stage persists up to a diameter of 5 that, ribs start appearing, bearing pinched, radially elongated umbilicaltubercles. Rare
Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . Fig. 36. Pamtexanites pseudotricarinatum sp. nov. Var. A Paratype SAS-Z807. Sparsely costate variety, x 0,84. CRETACEOUS FAUNAS FROM SOUTH AFRICA 51 central keel is broad and undulating. This thus gives rise to ornament on theventer comprising a series of rectangles. Ontogeny The holotype (Figs 32-33) is the only specimen with part of the innermostwhorls preserved. The smooth, rounded stage persists up to a diameter of 5 that, ribs start appearing, bearing pinched, radially elongated umbilicaltubercles. Rare bifurcations occur at this stage. The third row of tubercles. Fig. 37. Paratexanites pseudotricarinatum sp. nov. Var. B. Paratype NMB-D1060a. Compressed variety, x 0,66. 52 ANNALS OF THE SOUTH AFRICAN MUSEUM
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Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
