Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumWest, Newman & Company for the trustees of the Museum, 1990 - Natural history |
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Page 23
... krenkeli Lange and T. kigombana Aitken from the Neocomian - Aptian of Tanzania . Introduction Systematic description .. Acknowledgements References CONTENTS Ann . S. Afr . Mus . 99 ( 3 ) , 1990 : 23–29 , 1 fig . PAGE 23 2233 24 ...
... krenkeli Lange and T. kigombana Aitken from the Neocomian - Aptian of Tanzania . Introduction Systematic description .. Acknowledgements References CONTENTS Ann . S. Afr . Mus . 99 ( 3 ) , 1990 : 23–29 , 1 fig . PAGE 23 2233 24 ...
Page 24
... krenkeli . The concentric ribbing of the neanic stage is of such a character in both these species as to exclude them from Indotrigonia in spite of adult similarities , and Rutitrigonia is the only term available for species of Trigonia ...
... krenkeli . The concentric ribbing of the neanic stage is of such a character in both these species as to exclude them from Indotrigonia in spite of adult similarities , and Rutitrigonia is the only term available for species of Trigonia ...
Page 28
... krenkeli Lange ( 1914 : 230 , pl . 20 ( fig . 2 ) ) and T. kigombana Aitken ( 1961 : 95 , pl . 13 ( fig . 3 ) ) , both from the Rutitrigonia schwarzi Beds of the Tendaguru succession and thus of Hauterivian age . Zulutrigonia krenkeli ...
... krenkeli Lange ( 1914 : 230 , pl . 20 ( fig . 2 ) ) and T. kigombana Aitken ( 1961 : 95 , pl . 13 ( fig . 3 ) ) , both from the Rutitrigonia schwarzi Beds of the Tendaguru succession and thus of Hauterivian age . Zulutrigonia krenkeli ...
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Common terms and phrases
abbreviated according to chronology acute angle Aitken ANNALS antecarinal sulcus bicuspidata Gould Broad subtrigonal area Cape Town comprises coarse concentric costae curve strongly upwards described Haughton Diagnosis Shell escutcheon fastigiate roof-shaped flank costae Gastropoda GENUS OF RUTITRIGONIINAE Hoepen holotype Kobayashi krenkeli Lamarck Lange Later flank Leda LOWER CRETACEOUS APTIAN margin and obliquely marginal carina Megatrigonia middle growth stages Nakano namacolus nepionic stages noteworthy similarities Nucula obliquely truncate opisthogyrous beaks ornament comprises paratypes parentheses posterodorsal commissure punctuation reduction or enlargement references registration number respiratory margin ribbing Roman numerals RUTITRIGONIINAE BIVALVIA scientific name separate author's name shell is fastigiate Shell medium sized shouldered italics Smith South African Museum species straight posterodorsal margin strongly upwards posteriorly subconcentric subheadings are shouldered subterminal umbones subtrapezoidal Synonymy arrangement Syrotrigonia taxa Trigonia Rutitrigonia TRIGONIACEA umbonal ridge V-shaped costae ventral margin VOLUME 99 volume number Von Huene weakly ZULULAND Zulutrigonia gen Zulutrigonia pongolensis Rennie