Annals of the South African Museum, Volume 80The Museum, 1980 - Natural history |
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Page 35
... keel is undulating in all the specimens . In some specimens the undulations are so prominent as to create the appearance of a central row of tubercles . In addition , low swellings may connect the external tubercles spirally and across ...
... keel is undulating in all the specimens . In some specimens the undulations are so prominent as to create the appearance of a central row of tubercles . In addition , low swellings may connect the external tubercles spirally and across ...
Page 61
... undulating keels and stronger submarginal tubercles . The Zululand material resembles the French subspecies closest in possession of the undulating keel , but does not retain the double row of tubercles to such a large diameter . None ...
... undulating keels and stronger submarginal tubercles . The Zululand material resembles the French subspecies closest in possession of the undulating keel , but does not retain the double row of tubercles to such a large diameter . None ...
Page 94
... undulating keel are reminiscent of Texanites collignoni sp . nov . ( described below , p . 126 ) , which occurs stratigraphically higher up in the sequence . Similarly , Texanites texanum s.1 . , also with undulating keel , may be ...
... undulating keel are reminiscent of Texanites collignoni sp . nov . ( described below , p . 126 ) , which occurs stratigraphically higher up in the sequence . Similarly , Texanites texanum s.1 . , also with undulating keel , may be ...
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