Annals of the South African MuseumThe Museum, 1978 - Natual history |
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Page 190
24-45 mm diameter : the shell form is much as at the earlier growth stages ,
except that the flanks flatten slightly and the whorl section changes from slightly
depressed to almost quadrate . At this stage the lirae are visible to the naked eye
; they ...
24-45 mm diameter : the shell form is much as at the earlier growth stages ,
except that the flanks flatten slightly and the whorl section changes from slightly
depressed to almost quadrate . At this stage the lirae are visible to the naked eye
; they ...
Page 219
The whorl section is slightly compressed , oval . Ornament comprises slightly
rursiradiate , strengthened , simple main ribs which bifurcate or trifurcate across
the dorsum and are ornamented with dorsolateral and ventrolateral tubercles .
The whorl section is slightly compressed , oval . Ornament comprises slightly
rursiradiate , strengthened , simple main ribs which bifurcate or trifurcate across
the dorsum and are ornamented with dorsolateral and ventrolateral tubercles .
Page 275
Description The shell is very evolute ( umbilicus 50 % of diameter ) , compressed
, with a slightly depressed , subquadrate whorl section ( W / h = 1,11 ) . The
umbilicus is wide , shallow , with steeply inclined walls and evenly rounded
umbilical ...
Description The shell is very evolute ( umbilicus 50 % of diameter ) , compressed
, with a slightly depressed , subquadrate whorl section ( W / h = 1,11 ) . The
umbilicus is wide , shallow , with steeply inclined walls and evenly rounded
umbilical ...
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Common terms and phrases
abbreviation Africa Albian Ammonites Anisoceras appear Aptian author's name authors Barnard bearing BMNH body body chamber burchelli Cape Town capital Casey closely Collected colony compressed Cretaceous described Description designated developed diameter differs Discussion distal dorsal Equus Family fauna female figures flank Formation four genus Holotype illustrations included indicated infertile inner Kennedy Klinger known lacking lateral length Locality Lower male margin material Middle Millard Mortoniceras Note occur original ornament outer paratypes Pereopod Pictet Porto Amboim present preserved quagga range references ribs River rounded Sanmartinoceras scientific segment separates setae shell short shoulder single slightly Smith South African Museum southern Spath species specimens spines Stoliczkaia Synonymy Tables telson tubercles Type species umbilical University Upper uropod USNMNH venter ventral ventrolateral whole mount whorl whorl section Wiedmann zebra Zululand