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 24
... forms . Diagnosis SYSTEMATIC DESCRIPTION Superfamily TRIGONIACEAE Lamarck , 1819 Family Trigoniidae Lamarck , 1819 Subfamily Rutitrigoniinae van Hoepen , 1929 Shell small to moderately large , subovate to pyriform , subtrigonal and ...
... forms . Diagnosis SYSTEMATIC DESCRIPTION Superfamily TRIGONIACEAE Lamarck , 1819 Family Trigoniidae Lamarck , 1819 Subfamily Rutitrigoniinae van Hoepen , 1929 Shell small to moderately large , subovate to pyriform , subtrigonal and ...
Page 26
... forms an acute angle with the opposing area at the posterodorsal commissure so that the posterodorsal part of the shell is fastigiate ( roof - shaped ) . The ornament of the nepionic stages comprises coarse concentric costae , broader ...
... forms an acute angle with the opposing area at the posterodorsal commissure so that the posterodorsal part of the shell is fastigiate ( roof - shaped ) . The ornament of the nepionic stages comprises coarse concentric costae , broader ...
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... form of writing South African Museum registration numbers and date . 7. SPECIAL HOUSE RULES Capital initial letters ( a ) The Figures , Maps and Tables of the paper when referred to in the text e.g. . . . the Figure depicting C ...
... form of writing South African Museum registration numbers and date . 7. SPECIAL HOUSE RULES Capital initial letters ( a ) The Figures , Maps and Tables of the paper when referred to in the text e.g. . . . the Figure depicting C ...
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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 comma separates comprises coarse concentric costae curve strongly upwards described Haughton 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