Annals of the South African Museum: Annale Van Die Suid-Afrikaanse Museum

14 figs abbreviations Abstract according ACKNOWLEDGEMENTS Aguirre Urreta Albian ammonite Angolan ANNALS apparent endemic Argentina arrangement author's name authors basin bicuspidata Borissiakoceras capital chronological cited comma consecutively described DESCRIPTION designated diameter Dimensions Eomarshallites Estancia La Vega fauna FEBRUARY figures follows forms further genera genus Koloceras give given headings Hoepen Collection Holotype housed illustrations included indicated initial italics journal Klinger known Koloceras and Naramoceras Koloceras talenkanum Riccardi Labeceratinae lateral Leanza Leda letters lobe locality locality 51 material Medina & Rinaldi Naramoceras Note Nullo occur original parentheses Patagonia photographs plates preserved published punctuation Recent recorded reduction references Riccardi et al scientific name seems separates shape shouldered Smith SOUTH AFRICAN MUSEUM South Gondwanid species specimen subfamily subfamily Aconeceratinae subheadings suture lines Synonymy text-figs trifid type species Urreta & Riccardi volume whorl Zululand