. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. savanna as now indicated: Aparallactus lunulatus — East African invader, Coluber dorri — endemic to West Africa, Leptotyphlops macrorhynchus — desert invader, Naja haje — East African invader, Naja katiensis — endemic to West Africa. The two East African invaders (Aparallactus lunulatus and Naja haje) oc- cur widely in West African Sudanosahel savanna and are representatives of a larger group (Fig. 4) which penetrate West Africa to differing extent. Some (group &quo
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. savanna as now indicated: Aparallactus lunulatus — East African invader, Coluber dorri — endemic to West Africa, Leptotyphlops macrorhynchus — desert invader, Naja haje — East African invader, Naja katiensis — endemic to West Africa. The two East African invaders (Aparallactus lunulatus and Naja haje) oc- cur widely in West African Sudanosahel savanna and are representatives of a larger group (Fig. 4) which penetrate West Africa to differing extent. Some (group "a" below) are known only from eastern Nigeria and do not penetrate further into West Africa; others (group "b" below) are known from well in- side West Africa but often from few localities and as their identification too has frequently been in doubt it may be as well to document their occurrence: a) East African non-penetrants of West African savanna. Causus resimus — not known further west than Garoua Boulai ( N E), Cameroon but very likely occuring in Sudanosahel savanna of northeastern Nigeria (Hughes, 1978) and possibly present among the 633 specimens of }yCausus maculatus*' of which Roman (1973 a) has examined only Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Zoologisches Forschungsinstitut und Museum Alexander Koenig. Bonn : Das Forschungsinstitut
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