Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 75
... Paracrioceras in the Boreal , and Emericiceras in the Tethyan Realm . To this apparent synchronous development of geographically separate but mor- phologically related forms , Cryptocrioceras from the South Gondwanid Region ( southern ...
... Paracrioceras in the Boreal , and Emericiceras in the Tethyan Realm . To this apparent synchronous development of geographically separate but mor- phologically related forms , Cryptocrioceras from the South Gondwanid Region ( southern ...
Page 131
... Paracrioceras ' in the Boreal Realm . A full discussion on dimorphism in the subfamilies Crioceratitinae and Ancyloceratinae should be based on precisely located material from the classic European localities in the Boreal and Tethyan ...
... Paracrioceras ' in the Boreal Realm . A full discussion on dimorphism in the subfamilies Crioceratitinae and Ancyloceratinae should be based on precisely located material from the classic European localities in the Boreal and Tethyan ...
Page 132
... Paracrioceras - Emericiceras - Cryptocrioceras ' lineage of Crioceratites as a dimor- phic pair would certainly make sense . To prove it is difficult on the basis of the present material ; we need more stratigraphically substantiated ...
... Paracrioceras - Emericiceras - Cryptocrioceras ' lineage of Crioceratites as a dimor- phic pair would certainly make sense . To prove it is difficult on the basis of the present material ; we need more stratigraphically substantiated ...
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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