. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . the innerwhorls. Morrowites subdepressus Cobban & Hook (1983: 11, pi. 1 (figs 8-13), pi. 3(figs 19-20), pi. 4 (figs 1-3, 12-16), pi. 7, text-figs 6-7) also has straighter, more-rigidribs and, apparently, does not develop exaggerated ventrolateral horns. Morrowites dixeyi (Reyment) (1955: 50, pi. 9 (fig. 4), pi. 11 (fig. 2), text-figs 20-21) doesnot develop the exaggerated ventrolateral horns of the present species; neither doesMorrowites michelobiensis (Laube & Bruder) (1887:231, unnumbered text figure on p. 231). P
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . the innerwhorls. Morrowites subdepressus Cobban & Hook (1983: 11, pi. 1 (figs 8-13), pi. 3(figs 19-20), pi. 4 (figs 1-3, 12-16), pi. 7, text-figs 6-7) also has straighter, more-rigidribs and, apparently, does not develop exaggerated ventrolateral horns. Morrowites dixeyi (Reyment) (1955: 50, pi. 9 (fig. 4), pi. 11 (fig. 2), text-figs 20-21) doesnot develop the exaggerated ventrolateral horns of the present species; neither doesMorrowites michelobiensis (Laube & Bruder) (1887:231, unnumbered text figure on p. 231). Pseudaspidoceras flexuosum Powell (Kennedy et at. 1987: 34, pi. 2 (figs 1-4, 8-13,16-17), text-figs 3A-C, 5, 6C-D, 7A-C) differs from the present material in its subduedornament, looped ribs across the venter, and lack of ventrolateral horns. It is said toinclude in its synonymy Madagascan Ampakabites auriculatus (Collignon) (1965: 29,pi. 388 (fig. 1662), pi. 389 (fig. 1664)) and A collignoni Cobban & Scott (1973: 81, pi. 29 128 ANNALS OF THE SOUTH AFRICAN MUSEUM. Figure 23 Morrowites mocamedensis (Howarth). Partial suture, showing external lobe (E) and lateral saddle (E/L), of SAM-PCA1892 at 85 mm diameter. (figs 1-3), text-figs 39^0) from the Western Interior {fide Kennedy et al. 1987).Pseudaspidoceras sorachiense Matsumoto & Hashimoto (1953: 101, pi. 10 (fig. 1)) alsolacks ventrolateral horns and has straighter flank costae at comparable diameters;moreover, no mention is made of the multiplicity of outer ventrolateral tubercles which isa feature of the present species. Pseudaspidoceras conciliation (Stoliczka) (1864: 99, pi. 50 (fig. 4), pi. 51 (fig. 1)) is ahighly variable species with prominent outer ventrolateral tubercles which, to judge fromStoliczkas (1864, pi. 51 (fig. 1)) illustration, could be the septate bases of ventrolateralhorns; if this is so, it is generically distinct from Ampakabites. It differs fromM. mocamedensis in its quadrate whorl section at relatively
Size: 1800px × 1388px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
