Annals of the South African Museum, Volume 92The Museum, 1984 - Natual history |
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Page 133
... umbilical tu- bercles reaching up to the middle of the flanks . External saddle is half as high as the first lateral saddle which is as broad as high . First lateral lobe is very narrow . Second lateral saddle is not as broad as the ...
... umbilical tu- bercles reaching up to the middle of the flanks . External saddle is half as high as the first lateral saddle which is as broad as high . First lateral lobe is very narrow . Second lateral saddle is not as broad as the ...
Page 144
... umbilical tubercle . There is an initial smooth stage , which may persist to a diameter of 9 mm ; thereafter umbilical tubercles connecting to ventrolateral tubercles via weak ribs appear . With increasing diameter all ornament becomes ...
... umbilical tubercle . There is an initial smooth stage , which may persist to a diameter of 9 mm ; thereafter umbilical tubercles connecting to ventrolateral tubercles via weak ribs appear . With increasing diameter all ornament becomes ...
Page 245
... Umbilical Ø 45 46 Fig . 97. Histogram illustrating distribution of umbilical width in Zululand population of Gauthiericeras obesum van Hoepen , 1955 . Density of ribbing in the population is reasonably constant , varying be- tween 16 ...
... Umbilical Ø 45 46 Fig . 97. Histogram illustrating distribution of umbilical width in Zululand population of Gauthiericeras obesum van Hoepen , 1955 . Density of ribbing in the population is reasonably constant , varying be- tween 16 ...
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Common terms and phrases
abdominal segments adult Africa Ammonites antennae apex arthropods Barnard beetles besairiei brown brownish Cape Natal Cape Point Cape Town carcasses cerci Collected Collignon colour Coniacian d'Orbigny December dorsal view dravidicum Kossmat eggs elytra Family fauna genus Grossouvre hatched Head henniei Holotype inner whorls Labium large numbers larvae left lateral view lobe Locality long setae Lucia Formation mandible margae margin Matsumoto maxilla mesal mesothoracic Middle Coniacian Mollusca natalensis nymphs ocelli ornament outer whorls oval pairs of legs pale Paratype Peroniceras Peroniceras Peroniceras Zuluiceras piceous posterior Prionocycloceras pronotum Protexanites Pupa R.S. Africana R.S. Pieter Faure radula radula slide reddish Redtenbacher ribs River SAN DIEGO Santonian setae Shell shiny side South African Museum Sowerby spines spiracles subfamily subtricarinatum suture suture-line Syntypes text-fig Tomlin tridorsatum Schlüter type species umbilical undulatocarinatum Upper Coniacian valves venter ventral view ventrolateral tubercles westphalicum whorl section yellowish zulu Zuluites Zululand