Conservative plumage masks extraordinary phylogenetic diversity in the Grallaria rufula (Rufous Antpitta) complex of the humid Andes
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Conservative plumage masks extraordinary phylogenetic diversity in the Grallaria rufula (Rufous Antpitta) complex of the humid Andes. / Chesser, R. Terry; Isler, Morton L.; Cuervo, Andres M.; Cadena, C. Daniel; Galen, Spencer C.; Bergner, Laura M.; Fleischer, Robert C.; Bravo, Gustavo A.; Lane, Daniel F.; Hosner, Peter A.
In: Auk, Vol. 137, No. 3, 009, 2020.Research output: Contribution to journal › Journal article › Research › peer-review
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T1 - Conservative plumage masks extraordinary phylogenetic diversity in the Grallaria rufula (Rufous Antpitta) complex of the humid Andes
AU - Chesser, R. Terry
AU - Isler, Morton L.
AU - Cuervo, Andres M.
AU - Cadena, C. Daniel
AU - Galen, Spencer C.
AU - Bergner, Laura M.
AU - Fleischer, Robert C.
AU - Bravo, Gustavo A.
AU - Lane, Daniel F.
AU - Hosner, Peter A.
PY - 2020
Y1 - 2020
N2 - The Grallaria rufula complex is currently considered to consist of 2 species, G. rufula (Rufous Antpitta) and G. blakei (Chestnut Antpitta). However, it has been suggested that the complex, populations of which occur in humid montane forests from Venezuela to Bolivia, comprises a suite of vocally distinct yet morphologically cryptic species. We sequenced nuclear and mitochondrial DNA for 80 individuals from across the distribution of the complex to determine the extent of genetic variation between and within described taxa. Our results revealed 18 geographically coherent clades separated by substantial genetic divergence: 14 within rufula, 3 within blakei, and 1 corresponding to G. rufocinerea (Bicolored Antpitta), a species with distinctive plumage found to be nested within the complex. Neither G. rufula nor G. blakei as presently defined was monophyletic. Although 6 of the 7 recognized subspecies of G. rufula were monophyletic, several subspecies contained substantial genetic differentiation. Genetic variation was largely partitioned across recognized geographic barriers, especially across deep river valleys in Peru and Colombia. Coalescent modeling identified 17 of the 18 clades as significantly differentiated lineages, whereas analyses of vocalizations delineated 16 biological species within the complex. The G. rufula complex seems unusually diverse even among birds of the humid Andes, a prime location for cryptic speciation; however, the extent to which other dispersal-limited Andean species groups exhibit similar degrees of cryptic differentiation awaits further study.
AB - The Grallaria rufula complex is currently considered to consist of 2 species, G. rufula (Rufous Antpitta) and G. blakei (Chestnut Antpitta). However, it has been suggested that the complex, populations of which occur in humid montane forests from Venezuela to Bolivia, comprises a suite of vocally distinct yet morphologically cryptic species. We sequenced nuclear and mitochondrial DNA for 80 individuals from across the distribution of the complex to determine the extent of genetic variation between and within described taxa. Our results revealed 18 geographically coherent clades separated by substantial genetic divergence: 14 within rufula, 3 within blakei, and 1 corresponding to G. rufocinerea (Bicolored Antpitta), a species with distinctive plumage found to be nested within the complex. Neither G. rufula nor G. blakei as presently defined was monophyletic. Although 6 of the 7 recognized subspecies of G. rufula were monophyletic, several subspecies contained substantial genetic differentiation. Genetic variation was largely partitioned across recognized geographic barriers, especially across deep river valleys in Peru and Colombia. Coalescent modeling identified 17 of the 18 clades as significantly differentiated lineages, whereas analyses of vocalizations delineated 16 biological species within the complex. The G. rufula complex seems unusually diverse even among birds of the humid Andes, a prime location for cryptic speciation; however, the extent to which other dispersal-limited Andean species groups exhibit similar degrees of cryptic differentiation awaits further study.
KW - Andes
KW - cryptic species
KW - Grallaria rufula
KW - Grallariidae
KW - Rufous Antpitta
KW - species limits
KW - GENETIC DIFFERENTIATION
KW - EVOLUTIONARY DIFFERENTIATION
KW - SPECIES DELIMITATION
KW - GEOGRAPHIC-VARIATION
KW - CRYPTIC DIVERSITY
KW - AVES
KW - SPECIATION
KW - GENUS
KW - DIVERSIFICATION
KW - BIRDS
U2 - 10.1093/auk/ukaa009
DO - 10.1093/auk/ukaa009
M3 - Journal article
VL - 137
JO - Ornithology
JF - Ornithology
SN - 0004-8038
IS - 3
M1 - 009
ER -
ID: 255101574