Hm. Anderson et al., ARCHAEOPTERIS (PROGYMNOSPERMOPSIDA) FROM THE DEVONIAN OF SOUTHERN AFRICA, Biological Journal of the Linnean Society, 117(4), 1995, pp. 305-320
Archaeopteris notosaria sp. nov. based on one fertile and numerous ste
rile leafy branches is described from the Grahamstown By-Pass locality
, Witpoort Formation (Witteberg Group) Upper Devonian, and represents
the first unequivocal record of the genus in southern Africa. This occ
urrence is used, in its palaeogeographical context, to support the sug
gestion that climatic gradients in Late Devonian times were less steep
than they are at present.