Spatial Congruence Analysis (SCAN): A method for detecting biogeographical patterns based on species range congruences
Fig 5
Partial chorotypes of Heliodoxa hummingbirds in lowland Amazonia and pre-Andes.
Brilliant hummingbirds include a large diversity of species with distinctive biogeographical characteristics. Widespread lowland species: (A) H. aurescens (Gould’s Jewelfront) composes a two species chorotype, and (B) H. schreibersii (Black-throated Brilliant) is not biogeographically informative (does not gives rise to closed lists). Highland species show spatially localized patterns. In the east, the Pantepui chorotype (C) H. xanthogonys (Velvet-browed Brilliant). In the west, the pre-Andean region: (D) H. gularis (Pink-throated Brilliant); (E) H. branickii (Rufous-webbed Brilliant); (F) H. whitelyana (Black-breasted Brilliant). These summarized views of chorotypes present the range of congruence thresholds, depth (in parentheses), and number of species as descriptive parameters. Grouped species are listed in S3 Table. Ranges of individual species leading to partial chorotypes are shown in yellow; the common area for all species is in blue.