Annals of the South African Museum, Volume 92The Museum, 1984 - Natual history |
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Page 241
... Gauthiericeras et Peroniceras . ' In Wiedmann's discussion , Ciryella was suggested as an intermediate form between Gauthiericeras and Peroniceras , with the general coiling and evolute umbilicus of the latter ( U = 40 % at D 42 mm , 51 ...
... Gauthiericeras et Peroniceras . ' In Wiedmann's discussion , Ciryella was suggested as an intermediate form between Gauthiericeras and Peroniceras , with the general coiling and evolute umbilicus of the latter ( U = 40 % at D 42 mm , 51 ...
Page 243
... Gauthiericeras shows a number of similarities to Prionocy- cloceras Spath , 1926 , and , indeed , Spath ( 1926 : 80 ) considered it as transitional between Collignoniceras and Gauthiericeras . The type species differ in the strong ...
... Gauthiericeras shows a number of similarities to Prionocy- cloceras Spath , 1926 , and , indeed , Spath ( 1926 : 80 ) considered it as transitional between Collignoniceras and Gauthiericeras . The type species differ in the strong ...
Page 248
... Gauthiericeras obesum most closely resembles the type species , G. margae ( Schlüter , 1867 ) . Schlüter's figure is highly idealized , and a cast of the basis of Schlüter's figure is shown in Figures 20C and 94-95 . The outer whorl is ...
... Gauthiericeras obesum most closely resembles the type species , G. margae ( Schlüter , 1867 ) . Schlüter's figure is highly idealized , and a cast of the basis of Schlüter's figure is shown in Figures 20C and 94-95 . The outer whorl is ...
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Common terms and phrases
abdominal segments adult Africa Ammonites antennae apex arthropods Barnard beetles 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 pronotum Protexanites Pupa R.S. Africana R.S. Pieter Faure radula radula slide reddish Redtenbacher ribs River Santonian setae Shell shiny side South African Museum Sowerby specimens 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 Wiedmann yellowish Zone zulu Zuluites Zululand