Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 97
... coiling in this species is also more open crioceratitid than in C. ( C. ) yrigoyeni . Crioceratites janus Thieuloy ( 1979 : 310 , pl . 2 ( figs 1-4 ) ) , from the Upper Barremian of the Southern Vercors Mountains and referred to the ...
... coiling in this species is also more open crioceratitid than in C. ( C. ) yrigoyeni . Crioceratites janus Thieuloy ( 1979 : 310 , pl . 2 ( figs 1-4 ) ) , from the Upper Barremian of the Southern Vercors Mountains and referred to the ...
Page 130
... crioceratitid coiling should be referred to the same genus ( Hoplocrioceras ) . Immel made his views on dimorphism in general quite clear in a recent discussion ( Immel 1987 ) ; this may explain the total omission of the subject in his ...
... crioceratitid coiling should be referred to the same genus ( Hoplocrioceras ) . Immel made his views on dimorphism in general quite clear in a recent discussion ( Immel 1987 ) ; this may explain the total omission of the subject in his ...
Page 132
... coiling ( Acrioceras ) and larger forms with crioceratitid coiling ( Crioceratites ) might constitute a dimorphic pair in the family Ancyloceratidae . From a systematic point of view , this hypothesis is very attractive , because it ...
... coiling ( Acrioceras ) and larger forms with crioceratitid coiling ( Crioceratites ) might constitute a dimorphic pair in the family Ancyloceratidae . From a systematic point of view , this hypothesis is very attractive , because it ...
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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