Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . P. stangeri in Pondo-land, thus it does not seem possible to derive the species directly from P. this connection, however, it should be borne in mind that P. stangeri alreadyoccurs as early as Mid-Santonian in Madagascar (Collignon 1966a: 62, pi. 479(fig. 1951)) and Lower Santonian of the Gulf Coast Cretaceous (Young 1963).It is interesting to note that the specimen figured by CoUignon (1966^: 62, pi. 479(fig. 1951)) has very elongated external tubercles, from which the present speci-men may be derived. Or
Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . P. stangeri in Pondo-land, thus it does not seem possible to derive the species directly from P. this connection, however, it should be borne in mind that P. stangeri alreadyoccurs as early as Mid-Santonian in Madagascar (Collignon 1966a: 62, pi. 479(fig. 1951)) and Lower Santonian of the Gulf Coast Cretaceous (Young 1963).It is interesting to note that the specimen figured by CoUignon (1966^: 62, pi. 479(fig. 1951)) has very elongated external tubercles, from which the present speci-men may be derived. Ornament of the present specimen is not compatible with that of the otherknown southern African species of Reginaites, or with P. matsumotoi, fromwhich the latter are supposedly derived. If the specimen is, indeed, a truerepresentative of Reginaites, it would seem to suggest that Reginaites is repre-sented by two distinct, apparently independent lineages in southern Africa(Fig. 266). Occurrence Upper Santonian of Pondoland, Transkei. CRETACEOUS FAUNAS FROM SOUTH AFRICA 123. ->::. :.^ -r- \ B Fig. 94. Reginaites zulu sp. nov. Paratype SAS-H126A/4. Part of the body chamber, x 0,8. 124 ANNALS OF THE SOUTH AFRICAN MUSEUM Genus Texanites Spath, 1932Type species Ammonites texanus Roemer, 1852, by the original designation of Spath(1932: 379 footnote). Diagnosis Size of shell variable; may grow to enormous size. Coiling evolute toinvolute. Ornament consists from a relatively early stage of five rows of tubercles,with the lateral (2) row appearing last in ontogeny. Ornament is generallyvariable. Discussion In terms of numbers, the genus Texanites is the most important texani-tine taxon in the Upper Cretaceous deposits of southern Africa. Specimensreferred to this genus display a bewildering array of intraspecific variation,which causes one to cast serious doubt on current texanitid systematics. In his review of the genus, Matsumoto (1970: 270) Hsted the followingspecies definitely refe
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