Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 75
... shows a wide range of morphological variation over its geo- graphic and stratigraphic distribution during the Hauterivian and Barremian . The genus is most probably interpreted too widely but , as yet , no satisfactory subdivision has ...
... shows a wide range of morphological variation over its geo- graphic and stratigraphic distribution during the Hauterivian and Barremian . The genus is most probably interpreted too widely but , as yet , no satisfactory subdivision has ...
Page 94
... shows the extreme variation , not only in strength of ornament on the inner whorls , but also the differing ratios ... show the adult , body - chamber modifications seen in the Argentinian material with the development of bullae on the ...
... shows the extreme variation , not only in strength of ornament on the inner whorls , but also the differing ratios ... show the adult , body - chamber modifications seen in the Argentinian material with the development of bullae on the ...
Page 110
... shows part of a short hook , as does C80009 ( Fig . 34 ) , suggesting an overall length of c . 50 mm at maturity . The earliest developmental stages are best seen in C80005c ( Fig . 28A ) , and PCZ8443 ( Fig . 30A - D ) . The former shows ...
... shows part of a short hook , as does C80009 ( Fig . 34 ) , suggesting an overall length of c . 50 mm at maturity . The earliest developmental stages are best seen in C80005c ( Fig . 28A ) , and PCZ8443 ( Fig . 30A - D ) . The former shows ...
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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