Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 80
... close coiling plus the strong trituberculate ornamentation of the early whorls of ' C. ' yrigoyeni . Close coiling ( albeit not with a dorsal zone of impression ) associated with strong ornamentation of the inner whorls is known in the ...
... close coiling plus the strong trituberculate ornamentation of the early whorls of ' C. ' yrigoyeni . Close coiling ( albeit not with a dorsal zone of impression ) associated with strong ornamentation of the inner whorls is known in the ...
Page 82
... close coiling , may also belong to Menuthiocrioceras . In view of the variation shown in Malagasy Menuthiocrioceras , it is difficult on morphological grounds alone , to find any valid reasons for maintaining ' Cryptocrioceras ' and ...
... close coiling , may also belong to Menuthiocrioceras . In view of the variation shown in Malagasy Menuthiocrioceras , it is difficult on morphological grounds alone , to find any valid reasons for maintaining ' Cryptocrioceras ' and ...
Page 100
... close coiling and presence of constrictions on the outer whorls . An inner , trituberculate stage has not yet been found in C. diamantensis and we are not quite sure of its taxonomic pos- ition . We suspect that it may be closer to ...
... close coiling and presence of constrictions on the outer whorls . An inner , trituberculate stage has not yet been found in C. diamantensis and we are not quite sure of its taxonomic pos- ition . We suspect that it may be closer to ...
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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