. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . Figure 15 Kossmaticeras (Kossmaticeras) theobaldianum theobaldianum (Stoliczka). x Lateral and ventral views of SAM-PCA1902. UPPER CRETA CEOUS (TURONIAN-CONIA CI AN) AMMONITES FROM SAO NICOLA U, ANGOLA 117 The Angolan material closely resembles (and probably is ancestral to) LowerConiacian Hauericeras antiquum Collignon (1961: 75, fig. 12) but the latter species ismore evolute (umbilicus 40 per cent of the shell diameter), as is the ribbed Hauericerasaff. gardeni (Baily) of Renz (1982: 106, pi. 35 (fig. 2)) fro
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . Figure 15 Kossmaticeras (Kossmaticeras) theobaldianum theobaldianum (Stoliczka). x Lateral and ventral views of SAM-PCA1902. UPPER CRETA CEOUS (TURONIAN-CONIA CI AN) AMMONITES FROM SAO NICOLA U, ANGOLA 117 The Angolan material closely resembles (and probably is ancestral to) LowerConiacian Hauericeras antiquum Collignon (1961: 75, fig. 12) but the latter species ismore evolute (umbilicus 40 per cent of the shell diameter), as is the ribbed Hauericerasaff. gardeni (Baily) of Renz (1982: 106, pi. 35 (fig. 2)) from the Upper Coniacian orSantonian of Venezuela. Stratigraphical occurrence Mossamedites serratocarinatus (Kennedy & Cobban) is known only from the upperMiddle Turonian of northern Mexico and Angola. Family Kossmaticeratidae Spath, 1922Subfamily Kossmaticeratinae Spath, 1922Genus Kossmaticeras de Grossouvre, 1901 Type species Ammonites theobaldianus Stoliczka, 1865; by original designation (De Grossouvre,1901:719). Kossmaticeras theobaldianum (Stoliczka, 1865)Fig. 15 186
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
