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
... ribs , bearing a small ventral tubercle and separated by wider interspaces . At a slightly larger diameter ( 6 mm ) , the ribs become differentiated and the ornament consists of alternating tuberculate ribs and non - tuberculate ...
... ribs , bearing a small ventral tubercle and separated by wider interspaces . At a slightly larger diameter ( 6 mm ) , the ribs become differentiated and the ornament consists of alternating tuberculate ribs and non - tuberculate ...
Page 303
... ribs . However , both species are easily distinguished by the ornament of the final hook . In the former , there are radial , broad and rounded single ribs ( Casey 1961 : 80 , pl . 5 ( fig . 3a - b ) , pl . 21 ( fig . 2 ) ) , while in T ...
... ribs . However , both species are easily distinguished by the ornament of the final hook . In the former , there are radial , broad and rounded single ribs ( Casey 1961 : 80 , pl . 5 ( fig . 3a - b ) , pl . 21 ( fig . 2 ) ) , while in T ...
Page 307
... ribs are interrupted . The ribs show two rows of tubercles : one ventral and the other ventrolateral . On the upper part of the shaft some bear a third row of small tubercles near the umbilical edge . As in Toxoceratoides ? haughtoni ...
... ribs are interrupted . The ribs show two rows of tubercles : one ventral and the other ventrolateral . On the upper part of the shaft some bear a third row of small tubercles near the umbilical edge . As in Toxoceratoides ? haughtoni ...
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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