Annals of the South African Museum, Volume 80The Museum, 1980 - Natural history |
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Page 70
... cent of the total diameter , but may reach up to 60 per cent in some specimens . The whorl overlap is very little ; generally less than 10 per cent of the total whorl height . The species may grow up to a very large size ; the holotype ...
... cent of the total diameter , but may reach up to 60 per cent in some specimens . The whorl overlap is very little ; generally less than 10 per cent of the total whorl height . The species may grow up to a very large size ; the holotype ...
Page 152
... cent , through the holotype SAS - Z879 ( Fig . 109 ) with umbilical width of 38 per cent , to SAS - Z2100 ( Fig . 117 ) with an umbilical diameter of about 33 per cent . The rounded whorl section in the adult stage , and the undulating ...
... cent , through the holotype SAS - Z879 ( Fig . 109 ) with umbilical width of 38 per cent , to SAS - Z2100 ( Fig . 117 ) with an umbilical diameter of about 33 per cent . The rounded whorl section in the adult stage , and the undulating ...
Page 257
... cent , a reading of 41 per cent possibly being due to compression , and a Wb / Wh ratio of 0,93 to 0,69 decreasing with size , compared with an umbilical width of 32 to 39 per cent and a Wb / Wh ratio of 0,76 to 0,83 in S. woodsi ...
... cent , a reading of 41 per cent possibly being due to compression , and a Wb / Wh ratio of 0,93 to 0,69 decreasing with size , compared with an umbilical width of 32 to 39 per cent and a Wb / Wh ratio of 0,76 to 0,83 in S. woodsi ...
Contents
THE AMMONITE SUBFAMILY TEXANITINAE COLLIGNON | 2 |
Evolution and evolutionary trends in Texanitinae | 348 |
References | 354 |
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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