Annals of the South African Museum, Volume 80The Museum, 1980 - Natural history |
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Page 13
... umbilical diameter ( 31-33 % ) than P. ( P. ) cycni , and denser , more ... tubercles . In this respect P. ( P. ) bontanti shimizui is easily ... tubercles on the dorsal part of the flanks on the outer whorl . This may be an example of P ...
... umbilical diameter ( 31-33 % ) than P. ( P. ) cycni , and denser , more ... tubercles . In this respect P. ( P. ) bontanti shimizui is easily ... tubercles on the dorsal part of the flanks on the outer whorl . This may be an example of P ...
Page 100
... umbilical tubercles not associated with any ribs or ventro- lateral spines occur . Very faint lateral ( 2 ) tubercles start appearing at a diameter of c . 60 to 70 mm , becoming increasingly stronger with growth . At this diameter the ...
... umbilical tubercles not associated with any ribs or ventro- lateral spines occur . Very faint lateral ( 2 ) tubercles start appearing at a diameter of c . 60 to 70 mm , becoming increasingly stronger with growth . At this diameter the ...
Page 168
... umbilical wall and weakly inflated flanks . The broad bases of the ventrolateral spines now begin forming distinct single ribs which cover the flanks of the whorls . Distinct , radially elongated umbilical tubercles start appearing at ...
... umbilical wall and weakly inflated flanks . The broad bases of the ventrolateral spines now begin forming distinct single ribs which cover the flanks of the whorls . Distinct , radially elongated umbilical tubercles start appearing at ...
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