Annals of the South African Museum: Annale Van Die Suid-Afrikaanse Museum, Volume 96, Issues 6-9South African Museum, 1986 - Natural history |
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Page 298
... slightly arcuate shaft and a recurved terminal hook ( Fig . 14 ) . The whorl section is initially subquadrate or suboctagonal if measured over the trituberculate ribs ( Fig . 15A - B ) . It is equidimensional or slightly compressed ( Wh ...
... slightly arcuate shaft and a recurved terminal hook ( Fig . 14 ) . The whorl section is initially subquadrate or suboctagonal if measured over the trituberculate ribs ( Fig . 15A - B ) . It is equidimensional or slightly compressed ( Wh ...
Page 323
... slightly curved shaft . The recurved crozier is relatively long , and nearly parallel to the shaft . The whorl section in the helix is subcircular ; on the shaft it varies from slightly compressed to depressed , and on the crozier it ...
... slightly curved shaft . The recurved crozier is relatively long , and nearly parallel to the shaft . The whorl section in the helix is subcircular ; on the shaft it varies from slightly compressed to depressed , and on the crozier it ...
Page 398
... slightly emarginate . Ventral process sharply produced anteriorly , joining the main arm , slightly sinuate at its inner margin ; apex reaches basal third to half of length of mandible . Dorsal process thick , almost cylindrical ...
... slightly emarginate . Ventral process sharply produced anteriorly , joining the main arm , slightly sinuate at its inner margin ; apex reaches basal third to half of length of mandible . Dorsal process thick , almost cylindrical ...
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Common terms and phrases
Acrioceras Aedeagus Alcyonium variabile ammonites Ammonoidea Anal sternite Ancyloceras apex apical apomorphic Aptian arcuate asymmetrical Barremian of western basal bifid Cape Town capitulum Casey clypeus coenenchyme coiling Colchidites vulanensis australis colonies Colophon Colophon species CPBA Cretaceous d'Orbigny dilated Djanélidzé Dorsal process elytra evenly final hook forms fragments genera geol habitat Hamiticeras haughtoni Helicancylus patagonicus helix Heteroceras Heteroceratinae holotype izardi K. H. Barnard Kakabadze & Kennedy Kakabadze 1971a Klinger & Kennedy Koenen labrum Langeberg Leanza Lectotype Lucanidae Macroconch male mandibles material Metalcyonium montisatris sp morph ornament paessleri Paraimerites paramere Patagonia patagonicum planispiral plesiomorphic polyp primosi pronotum punctate referred ribs Río Mayer Río Mayer Formation Rouchadzé 1933 rounded sclerites shaft South African Museum Spath speciation species groups specimens stalk sternite stokoei Stolley suture line Swartberg Swartberg Range text-fig Thomson tibia Tixier-Durivault Tonohamites trituberculate tubercles Upper Barremian Ventral process vulanensis australis Klinger western Georgia whitei whorl section Zululand