. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . 592 with three apophyses, provides the first detailed osteological evidence thatthree-headed ribs were present in Erythrosuchus africanus. The presence of three-headedpectoral ribs is not therefore a unique synapomorphy of the genus Vjushkovia (see alsoGower & Sennikov 2000). The evidence from the apophyses of the anterior dorsal vertebrae is that the anteriordorsal ribs were dichocephalous. Substantial shaft fragments and a possible distal end of alarge dorsal rib belong to BMNH R3592, but no proximal ends are know
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . 592 with three apophyses, provides the first detailed osteological evidence thatthree-headed ribs were present in Erythrosuchus africanus. The presence of three-headedpectoral ribs is not therefore a unique synapomorphy of the genus Vjushkovia (see alsoGower & Sennikov 2000). The evidence from the apophyses of the anterior dorsal vertebrae is that the anteriordorsal ribs were dichocephalous. Substantial shaft fragments and a possible distal end of alarge dorsal rib belong to BMNH R3592, but no proximal ends are known. Posteriordorsal ribs ( Fig. 28C) are known only from proximal fragments. The sacral ribs (Fig. 25) are short, stout, and ventrolaterally directed. They are veryfirmly attached to the sacral vertebrae, but a suture is still evident. The ribs of the firstsacral vertebra are much larger than those of the second. Anteromedially they protrudebeyond the anterior surface of the centrum to provide additional articulatory surfaces for 52 ANNALS OF THE SOUTH AFRICAN MUSEUM.
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
