Annals of the South African Museum: Annale Van Die Suid-Afrikaanse Museum |
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Page 83
4 ( figs 1–2 ) ) , from the Neuquén Basin of Argentina , is a doubtful evolute
crioceratitid , being based on a single specimen lacking the inner whorls .
Occurrence Crioceratites has a world - wide distribution through the Hauterivian
to the Upper ...
4 ( figs 1–2 ) ) , from the Neuquén Basin of Argentina , is a doubtful evolute
crioceratitid , being based on a single specimen lacking the inner whorls .
Occurrence Crioceratites has a world - wide distribution through the Hauterivian
to the Upper ...
Page 93
Between tubercles , ribs are generally single but , in some specimens where
preservation is good , distinct looping is visible , and up to four ribs may connect
between the tubercles on the flanks . In some individuals ( e.g. Fig . 12D ) , very
long ...
Between tubercles , ribs are generally single but , in some specimens where
preservation is good , distinct looping is visible , and up to four ribs may connect
between the tubercles on the flanks . In some individuals ( e.g. Fig . 12D ) , very
long ...
Page 110
Mere striae on the dorsum , they strengthen across the umbilical wall ( where
they are distinctly rectiradiate ) and are concave across the umbilical shoulder .
Most ribs are single , although a L E evernur 1 Omm Fig . 25. Acrioceras ( A. )
zulu sp ...
Mere striae on the dorsum , they strengthen across the umbilical wall ( where
they are distinctly rectiradiate ) and are concave across the umbilical shoulder .
Most ribs are single , although a L E evernur 1 Omm Fig . 25. Acrioceras ( A. )
zulu sp ...
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Common terms and phrases
according Acrioceras Aguirre Urreta Ancyloceratinae appears Aspinoceras association australis sp authors Barremian bear BMNH body chamber Boreal ceras close coiling coiling Collignon 1962 compared compressed consists Crioceratites Cryptocrioceras described Description developed diameter dimorphism discussion distinct early elongated Emericiceras figured finely flanks followed forms genus Hemihoplites holotype illustrations Immel impression included inner whorls Italy Klinger known lateral lobe locality Lower material Menuthiocrioceras Museum Note occur ornament outer whorls Paracrioceras Patagonia possible preserved Realm recently referred regarded ribs Riccardi & Aguirre rounded Sarkar separate shaft shoulder shows similar single Sornayites South southern Spath specimens stage strong strongly subfamilies suggested suture synonym systematic tabarelli Astier taxonomic Tethyan Thieuloy Thomel trituberculate tubercles type species umbilical uncoiled Upper Upper Barremian variable venter ventral ventrolateral whorl section Wiedmann Wright yrigoyeni Leanza zone zulu sp Zululand
Bibliographic information
| Title | Annals of the South African Museum: Annale Van Die Suid-Afrikaanse Museum Volume 101, Issue 5 of Annals of the South African Museum, South African Museum |
| Author | South African Museum |
| Publisher | South African Museum, 1992 |
| Original from | the University of California |
| Digitized | 21 Jul 2016 |
| ISBN | 0868131288, 9780868131283 |
| Export Citation | BiBTeX EndNote RefMan |