Annals of the South African Museum, Volume 110West, Newman & Company for the trustees of the Museum, 2003 - Natural history |
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Page 137
34 (figs 4–5)) differs from the present species in the loss of ventrolateral spines
beyond about 50 mm diameter. Gauthiericeras fauremuretae Collignon (1967: 50
, pl. 28 (fig. 10)) may be a Prionocycloceras; it differs from the present material in
...
34 (figs 4–5)) differs from the present species in the loss of ventrolateral spines
beyond about 50 mm diameter. Gauthiericeras fauremuretae Collignon (1967: 50
, pl. 28 (fig. 10)) may be a Prionocycloceras; it differs from the present material in
...
Page 229
The umbilical width increases with growth, but even at the largest preserved
diameter, is still less than half the diameter of the whorls. SAM–PCZ18709 (Fig.
63F) represents the earliest growth stage available, at a whorl diameter of 5 mm.
Here ...
The umbilical width increases with growth, but even at the largest preserved
diameter, is still less than half the diameter of the whorls. SAM–PCZ18709 (Fig.
63F) represents the earliest growth stage available, at a whorl diameter of 5 mm.
Here ...
Page 253
On the second whorl, at a spiral diameter of c. 18 mm, spinose siphonal tubercles
appear in the umbilical suture, either from single or from paired ribs—their tips
resting on the adapical shoulder of the succeeding whorl. Distinct but small ...
On the second whorl, at a spiral diameter of c. 18 mm, spinose siphonal tubercles
appear in the umbilical suture, either from single or from paired ribs—their tips
resting on the adapical shoulder of the succeeding whorl. Distinct but small ...
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Common terms and phrases
ammonites Angola Annals anterior arch archosaurs articulates base become BMNH body chamber Broom CALIFORNIA Campanian closely Cobban coiling collections Collignon complete compressed Coniacian consists constrictions Cooper Cretaceous cylindraceum described Description diameter differs Diplomoceras Discussion distal dorsal early edge elements Erythrosuchus africanus Eubostrychoceras example fauna Figure flanks fossils fragments genus Geological Gower History holotype Howarth incomplete Kennedy Klinger known KwaZulu Lateral view LIBRARY locality lower Maastrichtian Madagascar material Matsumoto maxilla medial Middle narrow Natural occurrence original ornament Paleontology phragmocone position possibly posterior present preserved probably proximal referred represented ribs rounded SAM-PCA Santonian shaft shell shows similar single skull slightly Society South African Museum Spath species specimens St Lucia Formation suggests surface suture text-fig tubercles Turonian Type species umbilical UNIVERSITY Upper Upper Cretaceous venter ventral ventrolateral vertebrae whorl whorl section