. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 236 ANNALS OF THE SOUTH AFRICAN MUSEUM Description The single specimen is a fragment of about one-quarter whorl. The shell was moderately evolute, with a fairly wide, shallow umbilicus and evenly rounded umbilical shoulders. The flanks are broad, subparallel and only slightly convex, with a broadly rounded venter. There are two deep constrictions on the fragment, separated along the venter by a distance slightly greater than the whorl height. The constrictions are initially prorsiradiate, but soon re
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 236 ANNALS OF THE SOUTH AFRICAN MUSEUM Description The single specimen is a fragment of about one-quarter whorl. The shell was moderately evolute, with a fairly wide, shallow umbilicus and evenly rounded umbilical shoulders. The flanks are broad, subparallel and only slightly convex, with a broadly rounded venter. There are two deep constrictions on the fragment, separated along the venter by a distance slightly greater than the whorl height. The constrictions are initially prorsiradiate, but soon recurve before flexing strongly forwards to form a chevron across the venter. Discussion The Angolan material differs from P. sharpei in that the constrictions do not show as strong a geniculation, and are therefore not as strongly falcate. Wiedmann & Dieni (1968) included this species in the synonymy of Puzosia provincialis (Parona & Bonarelli), a lower Middle Albian species. The material figured by these authors (1968) as P. provincialis shows relict lappet structures and are, therefore, microconchs. The holotype of P. sharpei, on the other hand, is still septate at 83 mm diameter and appears to be a macroconch. Consequently, the authors regard the inclusion of P. sharpei into the synonymy of P. provincialis as premature, and prefer to maintain Spath's species as distinct, for the time being. Occurrence Puzosia sharpei is known with certainty only from southern England, France, Switzerland, and possibly Angola, where it is typical of the dispar Zone. *\. Fig. 35. Puzosia {Puzosia) cf. sharpei Spath. Lateral and ventral views of SAM-PCA3141. x 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
