. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 52 ANNALS OF THE SOUTH AFRICAN MUSEUM the Upper Albian, L. (Tuberolechites) has minute ventral tubercles on the ribs. Cenomanian and Turonian Sciponoceras either retain the simple ribbing of Lechites or become smooth, and constrictions become a permanent feature of ornamentation. In contrast, ornamentation in later, Turonian to Maastrichtian Baculites is notoriously variable. The great number of apparently endemic Baculites species recognized, as well as gross misidentifications all indicate how vari
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 52 ANNALS OF THE SOUTH AFRICAN MUSEUM the Upper Albian, L. (Tuberolechites) has minute ventral tubercles on the ribs. Cenomanian and Turonian Sciponoceras either retain the simple ribbing of Lechites or become smooth, and constrictions become a permanent feature of ornamentation. In contrast, ornamentation in later, Turonian to Maastrichtian Baculites is notoriously variable. The great number of apparently endemic Baculites species recognized, as well as gross misidentifications all indicate how variable ornament can be and the extent of homoeomorphy. Most problematic are the smooth (non-ornate species). Unless they have a very characteristic whorl section, as in some B. anceps, or a distinct sutural kirn Mr^ 10 B 10 D. E U. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
