Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 82
... forms from the Upper Hauterivian . If Menuthiocrioceras is to be considered as ancestral to Crioceratites — as tentatively suggested by Wied- mann ( 1973 ) —or possibly to ' Cryptocrioceras ' , an intermediate group of uncoiled forms ...
... forms from the Upper Hauterivian . If Menuthiocrioceras is to be considered as ancestral to Crioceratites — as tentatively suggested by Wied- mann ( 1973 ) —or possibly to ' Cryptocrioceras ' , an intermediate group of uncoiled forms ...
Page 115
... forms , e.g. C80005a - c ( Fig . 26 ) , ' normally ' ornamented ( C80009 , Fig . 27B ) , and coarsely ornamented forms ( PCZ8666 , Fig . 29A - B ) . As far as the coiling of the spiral section is concerned , we can speak of tightly ...
... forms , e.g. C80005a - c ( Fig . 26 ) , ' normally ' ornamented ( C80009 , Fig . 27B ) , and coarsely ornamented forms ( PCZ8666 , Fig . 29A - B ) . As far as the coiling of the spiral section is concerned , we can speak of tightly ...
Page 130
... forms with different coiling , it was certainly not with dimorphism in mind . Thomel ( 1981 ) subsequently added to his initial views , commenting on the similarity between Acrioceras tabarelli ( Astier ) and Emericiceras ottohaasi ...
... forms with different coiling , it was certainly not with dimorphism in mind . Thomel ( 1981 ) subsequently added to his initial views , commenting on the similarity between Acrioceras tabarelli ( Astier ) and Emericiceras ottohaasi ...
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Common terms and phrases
Acrioceras Acrioceras sp Africa Aguirre Urreta 1981 ammonites Ammonoidea Ancyloceras Ancyloceratinae Aptian Aspinoceras aspinoceratid australis sp barremense BMNH body chamber Boreal and Tethyan bullae ceras cliff and gully close coiling coarsely ornamented Collignon 1962 compressed Crioceratites Crioceratites s.s. Cryptocrioceras cundimarcae d'Orbigny diameter dimorphism discussion early whorls emerici Emericiceras family Ancyloceratidae flexuous genus genus Crioceratites Geology Giovine group of Crioceratites Hauterivian Hemihoplites sp holotype Immel inner whorls Kakabadze 1981 Leveillé lobe locality 170 Lower Barremian major ribs material Menuthiocrioceras Mlambongwenya Trading Store monopujaae Neuquén Obata outer whorls Palaeontology Paracrioceras Paraspinoceras Patagonia Pedioceras phragmocone Pseudothurmannia Rawson referred ribs Riccardi & Aguirre Sarkar Sornayites South African Museum southern Patagonia Spath species groups specimens tabarelli Astier taxonomic Tethyan Realm text-fig Thieuloy Thomel trituberculate ribs tubercles type species umbilical shoulder umbilical wall uncoiled Unterkreide Upper Barremian Upper Hauterivian Valanginian venter ventral tubercles ventrolateral shoulder whorl section Wiedmann yrigoyeni Leanza zulu sp Zululand