Annals of the South African Museum - Annale van die Suid-Afrikaanse Museum (1980) (14781218734)

Identifier: annalsofsouthaf801980sout (find matches)
Title: Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum
Year: 1898 (1890s)
Authors: South African Museum
Subjects: Natural history
Publisher: Cape Town : The Museum
Contributing Library: Smithsonian Institution Libraries
Digitizing Sponsor: Biodiversity Heritage Library



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Fig. 42. Paratexanites pseudotricarinatum sp. now. Var. D. Para type SAM-PCZ5 693. Variety with wider umbilicus and stronger ventrolateral ornament. The ribs here pass strongly over the venter on the body chamber, x 0,77. CRETACEOUS FAUNAS FROM SOUTH AFRICA 57
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^^^^: Fig. 43. Paratexanites pseudotricarinatum sp. nov. Var. E. Paratype NMB-D1364. Variety with constrictions on body chamber resulting in serrate outline, and faint lateral tubercle on flanks, foreshadowing Plesiotexanites development, x 0,6. 58 ANNALS OF THE SOUTH AFRICAN MUSEUM of meaningless names. In consequence, the most obvious varieties are hereHsted alphabetically with no formal taxonomic connotation. Var. A, represented by SAS-Z807 (Fig. 36) differs from the typical form mainlyin being much more coarsely costate throughout. Var. B, represented by NMB-D1060a (Figs 37-38) and SAS-Z815 has a morecompressed whorl section, with flattened flanks. Var. C, represented by SAS-Z2110 (Figs 39-40) and SAS-H198/1 has a moreinflated whorl section and high umbilical wall with clearly defined umbilicaledge in the adult stage. Var. D, is represented by one specimen only, SAM-PCZ5693 (Figs 41-42).Here ornament over the venter in the adult stage is strongest, with the ribscrossing the venter