Annals of the South African Museum, Volume 80The Museum, 1980 - Natural history |
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Page 66
... lateral tubercle and division of the ventrolateral node . Thus , in P. stangeri the ventrolateral node divides before the development of the lateral tubercle , thus mimicking a Paratexanites type of ornament . With the development of ...
... lateral tubercle and division of the ventrolateral node . Thus , in P. stangeri the ventrolateral node divides before the development of the lateral tubercle , thus mimicking a Paratexanites type of ornament . With the development of ...
Page 100
... lateral spines occur . Very faint lateral ( 2 ) tubercles start appearing at a diameter of c . 60 to 70 mm ... tubercle ( 4 ) , and a larger , rounded submarginal ( 3 ) tubercle . This eventually leads to the development of a normal ...
... lateral spines occur . Very faint lateral ( 2 ) tubercles start appearing at a diameter of c . 60 to 70 mm ... tubercle ( 4 ) , and a larger , rounded submarginal ( 3 ) tubercle . This eventually leads to the development of a normal ...
Page 116
... tubercles , and then continue as thin riblets up to the lateral keel . Preservation in this specimen is rather poor but it does appear that the lateral ( 2 ) tubercle again disappears on the body chamber , or stays feeble throughout ...
... tubercles , and then continue as thin riblets up to the lateral keel . Preservation in this specimen is rather poor but it does appear that the lateral ( 2 ) tubercle again disappears on the body chamber , or stays feeble throughout ...
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