Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . Fig. 239. Menabites {Australiella) australis (Besairie, 1930). SAM-PCZ5689. Transitional to M. {A.) besairiei. x 0,6. 314 ANNALS OF THE SOUTH AFRICAN MUSEUM. Fig. 240. Menabites {Australiella) australis (Besairie, 1930). SAM-PCZ5689. With whorl section transitional to M. {A.) besairiei. X CRETACEOUS FAUNAS FROM SOUTH AFRICA 315 M. (A.) austinensis was regarded as being close to M. {A.) australis byYoung (1963), but was said to differ on account of having weaker ventrolateralclavae and stronger umbilical tubercles
Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . Fig. 239. Menabites {Australiella) australis (Besairie, 1930). SAM-PCZ5689. Transitional to M. {A.) besairiei. x 0,6. 314 ANNALS OF THE SOUTH AFRICAN MUSEUM. Fig. 240. Menabites {Australiella) australis (Besairie, 1930). SAM-PCZ5689. With whorl section transitional to M. {A.) besairiei. X CRETACEOUS FAUNAS FROM SOUTH AFRICA 315 M. (A.) austinensis was regarded as being close to M. {A.) australis byYoung (1963), but was said to differ on account of having weaker ventrolateralclavae and stronger umbilical tubercles. These differences could all probably beincorporated in the intraspecific variation of M. {A.) australis as here interpreted,but the stratigraphic position of the species is perplexing. The species is basedon two specimens, both with dubious locality data. Young (1963: 116), how-ever, concludes that the species is either from Formation B or the DesauChalk. Formation B seems the most likely. . This would place the species ineither Lower Santonian or Lower Campanian, probably Lower Santonian,and would be the oldest record of the subgenus. Until the question on theexact stratigraphic position is resolved, it is considered ad
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
