Annals of the South African Museum, Volume 80The Museum, 1980 - Natural history |
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Page 330
... jeanneti , which also occurs in two forms ; a normally inflated form and a compressed form . Major differences between the two species according to Collignon ( 1948 : 36 ) are that the whorls of M. ( D. ) jeanneti are less massive , the ...
... jeanneti , which also occurs in two forms ; a normally inflated form and a compressed form . Major differences between the two species according to Collignon ( 1948 : 36 ) are that the whorls of M. ( D. ) jeanneti are less massive , the ...
Page 339
... jeanneti , pointing to the close relationship between the various species . The wide spacing of ribbing on the outer whorls is reminiscent of M. ( D. ) delawarensis , the whorl section is that of M. ( D. ) subdelawarensis , whereas the ...
... jeanneti , pointing to the close relationship between the various species . The wide spacing of ribbing on the outer whorls is reminiscent of M. ( D. ) delawarensis , the whorl section is that of M. ( D. ) subdelawarensis , whereas the ...
Page 340
... jeanneti with an umbilical width of 24 to 29 per cent compared to 22 per cent in the former . Examination of the whorl sections of the two species and details of ornament over the venter at comparable diameters ( see Collignon 1948 , pl ...
... jeanneti with an umbilical width of 24 to 29 per cent compared to 22 per cent in the former . Examination of the whorl sections of the two species and details of ornament over the venter at comparable diameters ( see Collignon 1948 , pl ...
Contents
THE AMMONITE SUBFAMILY TEXANITINAE COLLIGNON | 2 |
Evolution and evolutionary trends in Texanitinae | 348 |
References | 354 |
Copyright | |
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Common terms and phrases
Africa Ammonites australis Besairie besairiei Bevahites bifurcations body chamber CALIFORN Campanian of Madagascar clavate Collignon 1948 Coniacian Cretaceous ERSITY external tubercles falloti False Bay flanks Gulf Coast higher than wide Hoepen Hokkaido holotype inner whorls jeanneti Kennedy & Klinger lateral keels lateral ornament lateral tubercle lobes Lower Campanian Lower Santonian marginal material Matsumoto 1970 Menabites Australiella Menabites Delawarella Middle Campanian Mortoniceras occur ontogeny outer whorls Parabevahites Paratexanites Paratexanites pseudotricarinatum sp Paratype phragmocone Plesiotexanites stangeri Baily Pondoland radially elongated Reginaites ribs Richards Bay row of tubercles SAN DIEGO soutoni natalense ssp Spath specimen figured St Lucia Formation stage stratigraphic subdelawarensis submarginal Submortoniceras woodsi suture suture line Texanites soutoni natalense Texanites soutoni soutoni texanitids Texanitinae texanus text-fig tonian Transkei trituberculate type species umbilical diameter umbilical tubercles umbilical wall umbilical width Umkwelane Hill Umzamba Formation umzambiense undulating keel Upper Santonian vanhoepeni venter ventrolateral tubercles whorl section Zululand Zululand specimens