Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 93
... umbilical wall and bear faint conical to radially elongate tubercles on the inner edge of the umbilical wall . Very strong , rounded tubercles occur at or slightly below midflank . When well preserved , these are revealed as the bases ...
... umbilical wall and bear faint conical to radially elongate tubercles on the inner edge of the umbilical wall . Very strong , rounded tubercles occur at or slightly below midflank . When well preserved , these are revealed as the bases ...
Page 110
... umbilical wall ( where they are distinctly rectiradiate ) and are concave across the umbilical shoulder . Most ribs are single , although a 10mm L Fig . 25. Acrioceras ( A. ) zulu sp . nov . Suture line . SAM - PCZ8668 . C A B Fig . 29 ...
... umbilical wall ( where they are distinctly rectiradiate ) and are concave across the umbilical shoulder . Most ribs are single , although a 10mm L Fig . 25. Acrioceras ( A. ) zulu sp . nov . Suture line . SAM - PCZ8668 . C A B Fig . 29 ...
Page 127
... umbilicus ( 20 % of the diameter ) . The umbilical wall is flat , and inclined outwards ; the umbilical shoulder is abruptly rounded . The whorl section is compressed ( whorl breadth to height ratio is 0,67 ) , with the greatest breadth ...
... umbilicus ( 20 % of the diameter ) . The umbilical wall is flat , and inclined outwards ; the umbilical shoulder is abruptly rounded . The whorl section is compressed ( whorl breadth to height ratio is 0,67 ) , with the greatest breadth ...
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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