Annals of the South African Museum, Volume 110The Museum, 2003 - Natural history |
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Page 203
COILING The initial juvenile stages are unknown ; the earliest ontogenetic stages present consist of slightly curved shafts with a whorl height of c . 20 mm . With the exception of GD14000 , all the specimens consist of slightly curved ...
COILING The initial juvenile stages are unknown ; the earliest ontogenetic stages present consist of slightly curved shafts with a whorl height of c . 20 mm . With the exception of GD14000 , all the specimens consist of slightly curved ...
Page 229
Description Coiling is in a loose helix with the distance between successive whorls about half the height of the previous whorl . The umbilical width increases with growth , but even at the largest preserved diameter , is still less ...
Description Coiling is in a loose helix with the distance between successive whorls about half the height of the previous whorl . The umbilical width increases with growth , but even at the largest preserved diameter , is still less ...
Page 295
A few species of Didymoceras show loose coiling similar to that of D. ( E. ) mitraikyense , but in all the cases the ornament is sufficiently different to distinguish between these . D. ( D. ) donezianum ( Mikhailov , 1951 ) , recently ...
A few species of Didymoceras show loose coiling similar to that of D. ( E. ) mitraikyense , but in all the cases the ornament is sufficiently different to distinguish between these . D. ( D. ) donezianum ( Mikhailov , 1951 ) , recently ...
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Common terms and phrases
ammonites Angola Annals anterior arch archosaurs articulates base become BMNH body chamber Broom Campanian Cape caudal vertebrae 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 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 Upper Upper Cretaceous venter ventral ventrolateral vertebrae whorl whorl section
Bibliographic information
| Title | Annals of the South African Museum, Volume 110 Annals of the South African Museum, South African Museum |
| Contributor | South African Museum |
| Publisher | The Museum, 2003 |
| Original from | University of California, Berkeley |
| Digitized | 26 Jan 2016 |
| Export Citation | BiBTeX EndNote RefMan |