Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 81
... Menuthiocrioceras . According to Collignon ( 1949 ) , special features of Menuthiocrioceras included the whorl section , which is as wide as high to slightly wider than high , the contiguous whorls with a dorsal zone of impression such ...
... Menuthiocrioceras . According to Collignon ( 1949 ) , special features of Menuthiocrioceras included the whorl section , which is as wide as high to slightly wider than high , the contiguous whorls with a dorsal zone of impression such ...
Page 82
... Menuthiocrioceras is very large by normal crioceratitid standards - with estimated phragmocone diameters of 30-40 cm ( see e.g. M. sornayi in Collignon 1962 , pl . 208 ( fig . 925 ) ) , with orna- ment varying from densely ribbed ( e.g. ...
... Menuthiocrioceras is very large by normal crioceratitid standards - with estimated phragmocone diameters of 30-40 cm ( see e.g. M. sornayi in Collignon 1962 , pl . 208 ( fig . 925 ) ) , with orna- ment varying from densely ribbed ( e.g. ...
Page 83
... Menuthiocrioceras , but in parallel with Emericiceras in the Tethyan Realm and Paracrioceras in the Boreal Realm , from Crioceratites s.s. indeed a remarkable case of convergence . Thus , although Menuthiocrioceras is morphologically ...
... Menuthiocrioceras , but in parallel with Emericiceras in the Tethyan Realm and Paracrioceras in the Boreal Realm , from Crioceratites s.s. indeed a remarkable case of convergence . Thus , although Menuthiocrioceras is morphologically ...
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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