Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 84
... section : SAM- PCZ8447 is from Bed 17 ; PCZ8446 from Bed 18 ; PCZ8431 and PCZ8435 from Bed 19 ; PCZ8437 from Bed 21 ... whorl section are concerned . Coiling on the inner whorls is crioceratitid , with major trituberculate and ...
... section : SAM- PCZ8447 is from Bed 17 ; PCZ8446 from Bed 18 ; PCZ8431 and PCZ8435 from Bed 19 ; PCZ8437 from Bed 21 ... whorl section are concerned . Coiling on the inner whorls is crioceratitid , with major trituberculate and ...
Page 98
... whorl section is more compressed ( whorl breadth to height ratio is 0,7 ) . There are six to nine ribs in a distance equal to the whorl height . These arise at the umbilical shoulder as the feeblest of bullae . They are recti- to feebly ...
... whorl section is more compressed ( whorl breadth to height ratio is 0,7 ) . There are six to nine ribs in a distance equal to the whorl height . These arise at the umbilical shoulder as the feeblest of bullae . They are recti- to feebly ...
Page 110
... section on dimorphism . Records from Australia ( Kakabadze 1981 : 96 ) cannot be confirmed . Acrioceras ( Acrioceras ) ... whorl of phragmocone . Coiling is very variable - open with the early whorls not in close contact in C80005c ( Fig . 28A ) ...
... section on dimorphism . Records from Australia ( Kakabadze 1981 : 96 ) cannot be confirmed . Acrioceras ( Acrioceras ) ... whorl of phragmocone . Coiling is very variable - open with the early whorls not in close contact in C80005c ( Fig . 28A ) ...
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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