Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 72
... 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 referred to Hemihoplites Spath , 1924 , by ...
... 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 referred to Hemihoplites Spath , 1924 , by ...
Page 94
... material is significant in that it shows the extreme variation , not only in strength of ornament on the inner whorls , but also the differing ratios of major and minor ribs during the course of ontogeny within the same , and also ...
... material is significant in that it shows the extreme variation , not only in strength of ornament on the inner whorls , but also the differing ratios of major and minor ribs during the course of ontogeny within the same , and also ...
Page 123
... material from Patagonia , described recently by Riccardi & Aguirre Urreta ( 1989 ) under the generic name of Hemihoplites Spath , 1924. Our material does not contribute in any constructive way to the discussion of whether Hemihoplites ...
... material from Patagonia , described recently by Riccardi & Aguirre Urreta ( 1989 ) under the generic name of Hemihoplites Spath , 1924. Our material does not contribute in any constructive way to the discussion of whether Hemihoplites ...
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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