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 295
... helix . Phragmocone ornamented as in Ancyloceras , with periodic trituberculate ribs . Final hook with close , narrow , sharp ribbing which bifurcates or trifurcates irregularly from an umbilical tubercle . Suture line as in Ancyloceras ...
... helix . Phragmocone ornamented as in Ancyloceras , with periodic trituberculate ribs . Final hook with close , narrow , sharp ribbing which bifurcates or trifurcates irregularly from an umbilical tubercle . Suture line as in Ancyloceras ...
Page 320
... helix is followed by a planispirally coiled section of variable duration , which embraces the initial helix , finally uncoiling into a shaft and recurved hook . In some forms an uncoiled section has not yet been recorded , and it is ...
... helix is followed by a planispirally coiled section of variable duration , which embraces the initial helix , finally uncoiling into a shaft and recurved hook . In some forms an uncoiled section has not yet been recorded , and it is ...
Page 326
... helix consisting of at least five whorls , surrounded by one or two or more planispiral whorls . No uncoiled section is present . The whorls of the helix are tightly coiled and impressed ; they are either dextral or sinistral . Of 57 ...
... helix consisting of at least five whorls , surrounded by one or two or more planispiral whorls . No uncoiled section is present . The whorls of the helix are tightly coiled and impressed ; they are either dextral or sinistral . Of 57 ...
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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