Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumWest, Newman & Company for the trustees of the Museum, 1989 - Natural history |
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Page 191
... Ornament becomes subdued in later forms and umbilical tubercles reduced . Myloceras 1. Decrease in overall size . 2. Lateral lobe ( L ) changes from asymmetric to symmetrically trifid . 3. Whorl section becomes more com- pressed . 4 ...
... Ornament becomes subdued in later forms and umbilical tubercles reduced . Myloceras 1. Decrease in overall size . 2. Lateral lobe ( L ) changes from asymmetric to symmetrically trifid . 3. Whorl section becomes more com- pressed . 4 ...
Page 196
... ornament . This leads to surprising homoeomorphy between Labeceras and Myloceras ( Fig . 7 ) . This raises the question of dimorphism in Labeceratinae - i.e . whether Myloceras is the macroconch and Labeceras the microconch . Apart from ...
... ornament . This leads to surprising homoeomorphy between Labeceras and Myloceras ( Fig . 7 ) . This raises the question of dimorphism in Labeceratinae - i.e . whether Myloceras is the macroconch and Labeceras the microconch . Apart from ...
Page 219
... ornament of the type and only species , M. ( C. ) andinus , it appears to be close to the group of M. besairiei and ' Ellipsoceras ' expansum . On the whole , description of this fauna does not change any of the opinions expressed in ...
... ornament of the type and only species , M. ( C. ) andinus , it appears to be close to the group of M. besairiei and ' Ellipsoceras ' expansum . On the whole , description of this fauna does not change any of the opinions expressed in ...
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Common terms and phrases
abbreviated Africa-Madagascar and Australia Albian of Zululand AMMONITE Ancyloceratinae Angola Angola Basin Austral Basin Baculites BesairiƩ besairiei Collignon Brazil-Angola Basin Cape Basin Cenomanian ceras climate Cobban coiling Collignon 1963 comma compressed whorl section crassicostatum Cretaceous CROZIER Estancia La Vega Etheridge F G H faunas figures Gastropoda genera Hamites heteromorph Holotype intraspecific Labe Labeceras and Myloceras Labeceras crassetuberculatum Klinger Labeceras gr Labeceras rectum Labeceras Spath Later forms lateral lappets Leanza Leda Madagascar material McNamara microconch Middle Albian Mozambique Mylo Myloceras bituberculatum sp Myloceras gr Myloceras rotundum Klinger Myloceras serotinum Spath onshore Ornament paratypes parentheses Patagonia phylogenetic PHYLOGENY punctuation recorded Reyment Roman numerals Samana Range Santa Cruz Province scaphitids scientific name Sketch of aperture Smith South African Museum South Atlantic southern India straight shaft strati stratigraphic range suggested Suture line Synonymy systematics type species umbilical tubercles Upper Albian venter Venzo Walvis Ridge Wiedmann & Dieni Wright