Annals of the South African Museum, Volume 80The Museum, 1980 - Natural history |
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Page 34
... width at the umbilical tubercle , which is situated somewhat ventral of the umbilical edge ( Figs . 21B - C ) . Details of the early ontogeny are illustrated in SAS - 36 / 3238 ( Fig . 22 ) where the smooth stage continues up to a ...
... width at the umbilical tubercle , which is situated somewhat ventral of the umbilical edge ( Figs . 21B - C ) . Details of the early ontogeny are illustrated in SAS - 36 / 3238 ( Fig . 22 ) where the smooth stage continues up to a ...
Page 89
... umbilical width of 45 to 47 per cent of the total diameter , and a very shallow dorsal zone of impression . The ... umbilical seam , and soon broad , flat ribs appear , some with incipient looping . At a diameter of 20 mm umbilical ...
... umbilical width of 45 to 47 per cent of the total diameter , and a very shallow dorsal zone of impression . The ... umbilical seam , and soon broad , flat ribs appear , some with incipient looping . At a diameter of 20 mm umbilical ...
Page 152
... umbilical width at 41 per 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 ...
... umbilical width at 41 per 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 ...
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