. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. UPPERMOST CENOMANIAN-BASAL TURONIAN AMMONITES FROM SALINAS, ANGOLA 75 ornamented with close, dense, robust long ribs extending to the umbilical margin. Age: ? Albian-? Campanian, mainly Cenomanian-Turonian. P. (Mesopuzosia). Similar to P. (Puzosia), but with straight, rigid constric- tions, while ribbing may arise close to the umbilical shoulder. Age: Turonian-Coniacian. Subgenus Austiniceras Spath, 1922 Type species Ammonites austeni Sharpe, 1855 Puzosia (Austiniceras) intermedia orientalis Matsumot
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. UPPERMOST CENOMANIAN-BASAL TURONIAN AMMONITES FROM SALINAS, ANGOLA 75 ornamented with close, dense, robust long ribs extending to the umbilical margin. Age: ? Albian-? Campanian, mainly Cenomanian-Turonian. P. (Mesopuzosia). Similar to P. (Puzosia), but with straight, rigid constric- tions, while ribbing may arise close to the umbilical shoulder. Age: Turonian-Coniacian. Subgenus Austiniceras Spath, 1922 Type species Ammonites austeni Sharpe, 1855 Puzosia (Austiniceras) intermedia orientalis Matsumoto, 1959 Ammonites planulatus Stoliczka {non J. de C. Sowerby), 1865: 134, pi. 67 (figs la-b only). Puzosia gaudama Kossmat {non Forbes), 1898: 118, pi. 16 (figs 2-3), pi. 22 (fig. 2). Puzosia cf. gaudama (Forbes) Choffat, 1898: 82, pi. 17 (fig. 2), pi. 18 (fig. 1). Puzosia orientate Matsumoto, 1954a: 74, pi. 13 (figs 1-2). Collignon, 1961: 32, pi. 5 (fig. 1). Puzosia orientate kossmati Matsumoto, 1954a: 75. Puzosia praecompressa Collignon, 1964: 55, pi. 332 (fig. 1493). Puzosia intermedia orientalis Matsumoto, 19596: 16, pi. 4 (fig. 1). Diagnosis A moderately evolute (umbilicus 27-34% of diameter), compressed (W/H = 0,70-0,78) species of Puzosia with about 4-6 straight, prorsiradiate constrictions which project strongly forward on the venter. Numerous fine, strongly prorsi- radiate ribs intercalated on outer one-third of flanks between constrictions and projected strongly across the venter. Description The single specimen from these beds has the recrystallized test preserved. It is strongly compressed and moderately involute, with slightly more than half the preceding whorl covered. The umbilicus is fairly narrow and rather shallow, with a steep, slightly undercut umbilical wall. The broad flanks are flat, converging slightly to the narrowly arched venter. The ornament comprises probably 4-5 straight prorsiradiate constrictions per whorl which project strongly forward across th
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
