Geography Reference
In-Depth Information
as aprioristic all rules to resolve centers of origin and dispersal without ref-
erence to general patterns of vicariance.
Nelson and Platnick's (1981)
Systematics and Biogeography: Cladistics
and Vicariance
marks the culmination of the dispute between Croizat and
New York biogeographers. Simultaneously, it marks the birth of cladistic
biogeography as an independent approach of panbiogeography. According
to these authors,
Figure 3.7
Vicariance of an ancestral species widespread in South America and
Africa: (a) ancestral species A; (b) vicariance of species A into descendant species
A1 and A2; (c) subsequent splitting of A2 into descendant species A2a and A2b;
(d) dispersal interpretation; (e) vicariance interpretation (modified from Nelson
1974:556; reproduced with permission of
Systematic Biology
).
