Annals of the South African Museum: Annale Van Die Suid-Afrikaanse Museum, Volume 107, Issue 1South African Museum, 1898 - Natual history |
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Page 33
... WHORL SECTION Apart from obvious ontogenetic changes , the whorl section seems to be one of the few reliable features in baculitid systematics , especially in the genus Baculites . The whorl section in Lechites and Sciponoceras is ...
... WHORL SECTION Apart from obvious ontogenetic changes , the whorl section seems to be one of the few reliable features in baculitid systematics , especially in the genus Baculites . The whorl section in Lechites and Sciponoceras is ...
Page 34
... whorl section is distinctly trigonal to cuneate , and the venter is narrowly fastigiate , rather than broadly tabulate and the dorsum is flattened . Eubaculites simplex is generally more compressed than any of the other Eubaculites ...
... whorl section is distinctly trigonal to cuneate , and the venter is narrowly fastigiate , rather than broadly tabulate and the dorsum is flattened . Eubaculites simplex is generally more compressed than any of the other Eubaculites ...
Page 71
... Whorl section Lechites and Sciponoceras have circular or elliptical whorl sections . Early , Turonian Baculites have elliptical whorl sections ; in later forms it varies between species , but seems to be rather consistent within the ...
... Whorl section Lechites and Sciponoceras have circular or elliptical whorl sections . Early , Turonian Baculites have elliptical whorl sections ; in later forms it varies between species , but seems to be rather consistent within the ...
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Common terms and phrases
9 figs Albian ammonites anceps aperture aquilaensis Baculites Baculites cf Baculites codyensis Reeside Baculites sp baculitid baculoides bailyi Bearpaw Shale BMNH body chamber Boehmoceras Brunnschweiler 1966 California capensis carinatus Cenomanian Chalk Cobban & Kennedy Collignon 1970 compressus Coniacian County Creek Elias Eubaculites fide Formation gaudini genus Baculites Hokkaido Holotype Holotype by monotypy Indo-Pacific Kennedy & Cobban Klinger & Kennedy kossmati Lechites Lectotype leopoliensis lineage Lower Campanian Lower Maastrichtian Maastrichtian macroconch Madagascar Matsumoto & Obata Matsumoto 1959 Meek Middle Campanian Moberg Montana Morton muscle scar NHMW Occurrence original of Collignon ovatus paratype phragmocone Pierre Shale Pseudobaculites Reeside Santonian Sciponoceras shell South Dakota Spath species specimens Stratigraphic distribution subanceps subsequent designation suture line text-fig Toole County Trachybaculites Turonian Type Upper Albian Upper Campanian Upper Maastrichtian Upper Turonian USGS Mesozoic locality USNM vagina vanhoepeni venter ventral vertebralis Western Interior whorl height whorl section Wright & Kennedy Wyoming yokoyamai zone Zululand