. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . e shell diameter. SYSTEMATIC PALAEONTOLOGY Class CEPHALOPODA Cuvier, 1797 Subclass AMMONOIDEA Zittel, 1884 Order PHYLLOCERATIDA Arkell, 1950 Suborder PHYLLOCERATINA Arkell, 1950 Superfamily PHYLLOCERATACEAE Zittel, 1884 Family Phylloceratidae Zittel, 1884 Subfamily Phylloceratinae Zittel, 1884 Genus Hypophylloceras Salfeld, 1924 Subgenus Hypophylloceras Salfeld, 1924 Type species Phylloceras onoense Stanton, 1894; by original designation (Salfeld, 1924: 60). Discussion The writer follows a number of earlier workers
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. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . e shell diameter. SYSTEMATIC PALAEONTOLOGY Class CEPHALOPODA Cuvier, 1797 Subclass AMMONOIDEA Zittel, 1884 Order PHYLLOCERATIDA Arkell, 1950 Suborder PHYLLOCERATINA Arkell, 1950 Superfamily PHYLLOCERATACEAE Zittel, 1884 Family Phylloceratidae Zittel, 1884 Subfamily Phylloceratinae Zittel, 1884 Genus Hypophylloceras Salfeld, 1924 Subgenus Hypophylloceras Salfeld, 1924 Type species Phylloceras onoense Stanton, 1894; by original designation (Salfeld, 1924: 60). Discussion The writer follows a number of earlier workers (Birkelund 1965; Matsumoto &Morozumi 1980; Matsumoto 1984; Henderson & McNamara 1985; Cooper 1989) inaccording Hypophylloceras generic status. Hypophylloceras (Hypophylloceras) sp. no v.?Fig. 3A-B Compare Phylloceras cf. ellipticum Collignon (non Kossmat), 1956: 14, pi. 1 (fig. 1). Material With certainty only SAM-PCA1872, from Bed IV, although a crushed and poorlypreserved specimen, SAM-PCA1772 from Bed V, may belong here also. 94 ANNALS OF THE SOUTH AFRICAN MUSEUM. Figure 3 A-B. Hypophylloceras (Hypophylloceras) sp. nov.? x 1.5. Ventral and lateral views of SAM-PCA1872. C-D. Damesites ainuamis Matsumoto. x 1.5. Ventral and lateral views of SAM-PCA1756. E. Gaudiyceras mite (von Hauer). x 1.5. Lateral view of SAM-PCA1750. F-G. Tetragonites glabrus (Jimbo). x 1.5. Ventral and lateral views of SAM-PCA1870. UPPER CRETA CEOUS (TURONIAN-CONIA CI AN) AMMONITES PROM SAO NICOLA U, ANGOLA 95 Description The shell is compressed, with virtually the entire preceding whorl covered. Theumbilicus is very involute (5 per cent of the shell diameter), pit-like, with a slopingumbilical wall and subrounded shoulder. The whorl section is subovate, compressed(H/W = 1.36), with a narrow evenly arched venter and weakly convex flanks whichconverge slightly towards the venter. Maximum width is one-third of the way up the flank. Ornament is lacking on the inner flanks but this is due, at least partly, to