Annals of the South African Museum, Volume 110West, Newman & Company for the trustees of the Museum, 2003 - Natural history |
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Page 179
Here, ribbing occurs on both phragmocone and body chamber, but the strength
and shape of ribbing changes dramatically on internal moulds at the end of the
phragmocone and beginning of the body chamber. This can be clearly seen on
the ...
Here, ribbing occurs on both phragmocone and body chamber, but the strength
and shape of ribbing changes dramatically on internal moulds at the end of the
phragmocone and beginning of the body chamber. This can be clearly seen on
the ...
Page 203
The inner shaft is part of the phragmocone, the outer is body chamber. This
suggests that coiling of the adult shell may have been in an open, elliptical
criocone. An elliptical crioconic shell is also consistent with the taphonomy of the
species.
The inner shaft is part of the phragmocone, the outer is body chamber. This
suggests that coiling of the adult shell may have been in an open, elliptical
criocone. An elliptical crioconic shell is also consistent with the taphonomy of the
species.
Page 244
Coiling changes in the later part of the phragmocone and body chamber.
Ornament generally consists of two rows of tubercles at some stage; in some
forms irregularly developed. Discussion In most Nostoceras (Nostoceras) species
the body ...
Coiling changes in the later part of the phragmocone and body chamber.
Ornament generally consists of two rows of tubercles at some stage; in some
forms irregularly developed. Discussion In most Nostoceras (Nostoceras) species
the body ...
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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