Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 72
... specimens , some of which are identical to material described under the name Cryptocrioceras by Aguirre Urreta ( 1981 ) , and acrioceratid specimens best referred to the genus Acrioceras Hyatt , 1900 . Two specimens resemble material ...
... specimens , some of which are identical to material described under the name Cryptocrioceras by Aguirre Urreta ( 1981 ) , and acrioceratid specimens best referred to the genus Acrioceras Hyatt , 1900 . Two specimens resemble material ...
Page 93
... specimens , and from straight to convex in all . Between tubercles , ribs are generally single but , in some specimens where preservation is good , distinct looping is visible , and up to four ribs may connect between the tubercles on ...
... specimens , and from straight to convex in all . Between tubercles , ribs are generally single but , in some specimens where preservation is good , distinct looping is visible , and up to four ribs may connect between the tubercles on ...
Page 94
... specimens is as large as the Patagonian specimens figured by Aguirre Urreta ( 1981 ) , but the similar inner whorls leave no doubt that they all belong to the same species . Our material is significant in that it shows the extreme ...
... specimens is as large as the Patagonian specimens figured by Aguirre Urreta ( 1981 ) , but the similar inner whorls leave no doubt that they all belong to the same species . Our material is significant in that it shows the extreme ...
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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