Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 74
... zone of impression . The whorl section changes from subtrapezoidal to subquadrate . The ornamentation of the inner whorls consists of strong , trituberculate ribs and intercalatories . Both types pass over the flanks on the whole ...
... zone of impression . The whorl section changes from subtrapezoidal to subquadrate . The ornamentation of the inner whorls consists of strong , trituberculate ribs and intercalatories . Both types pass over the flanks on the whole ...
Page 81
... zone of impression such as found in Lyto- ceras , trituberculate ornamentation , and lack of an uncoiled section . Collignon ( 1949 ) commented on the similarities between Menuthiocrioceras and the Boreal crioceratitids from northern ...
... zone of impression such as found in Lyto- ceras , trituberculate ornamentation , and lack of an uncoiled section . Collignon ( 1949 ) commented on the similarities between Menuthiocrioceras and the Boreal crioceratitids from northern ...
Page 104
... zone of impression in A and distinct con- A B C Fig . 22. Crioceratites ( C. ) strictions in E. All × 1 . Fig . 24. Crioceratites ( C. ) australis sp . 104 ANNALS OF THE SOUTH AFRICAN MUSEUM.
... zone of impression in A and distinct con- A B C Fig . 22. Crioceratites ( C. ) strictions in E. All × 1 . Fig . 24. Crioceratites ( C. ) australis sp . 104 ANNALS OF THE SOUTH AFRICAN MUSEUM.
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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