Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 74
... Cryptocrioceras in Pata- gonia by Aguirre Urreta ( 1981 ) occur . In this discussion we concentrate mainly on the systematic position and affinity of ' Cryptocrioceras ' within the genus Crioceratites . The genus Cryptocrioceras was ...
... Cryptocrioceras in Pata- gonia by Aguirre Urreta ( 1981 ) occur . In this discussion we concentrate mainly on the systematic position and affinity of ' Cryptocrioceras ' within the genus Crioceratites . The genus Cryptocrioceras was ...
Page 81
... Cryptocrioceras ' are as far removed from the mainstream of Crioceratites as are ' Emericiceras ' or ' Paracrioceras ' . In the discussion on possible dimorphism ( see p . 129 ) , we also note that ' Cryptocrioceras ' occurs with ...
... Cryptocrioceras ' are as far removed from the mainstream of Crioceratites as are ' Emericiceras ' or ' Paracrioceras ' . In the discussion on possible dimorphism ( see p . 129 ) , we also note that ' Cryptocrioceras ' occurs with ...
Page 83
... Cryptocrioceras ' , it seems preferable from phylogenetic , palaeobiogeographic and taxonomic points of view to separate them , and to regard Cryptocrioceras as a true Crioceratites with affinities to the groups of ' Emericiceras ' and ...
... Cryptocrioceras ' , it seems preferable from phylogenetic , palaeobiogeographic and taxonomic points of view to separate them , and to regard Cryptocrioceras as a true Crioceratites with affinities to the groups of ' Emericiceras ' and ...
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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