01278nas a2200121 4500008004100000245018700041210006900228490000800297520076600305100002201071700002201093856004101115 2018 eng d00aReevaluation of the taxonomic positions of members of the Epinecrophylla fjeldsaai (Aves: Passeriformes: Thamnophilidae) antwren complex including E. fjeldsaai based on vocalizations0 aReevaluation of the taxonomic positions of members of the Epinec0 v1303 a

The northwestern populations in the dead-leaf-foraging Epinecrophylla haematonota complex of thamnophilid antwrens includes E. pyrrhonota, E. fjeldsaai, and E. haematonota. Their taxonomic position has been the subject of recent debate. Divergence in homologous vocalizations provides a principal measure of reproductive isolation and species status for thamnophilid antbirds under the biological species concept, but until recently their evaluation as species has been hampered by the paucity of recordings of E. fjeldsaai. That insufficiency has been remedied, enabling an analytic comparison of vocalizations of the 3 taxa. The results of this analysis led to the recommendation that the 3 taxa be ranked as subspecies of Epinecrophylla haematonota.

1 aIsler, Morton, L.1 aWhitney, Bret, M. uhttps://bio.acousti.ca/it/node/5353901916nas a2200157 4500008004100000022001400041245009500055210006900150260001600219300001200235490000800247520140000255100002201655700002401677856005701701 2017 eng d a1559-449100aVocal variation and species limits in the Sclerurus mexicanus complex0 aVocal variation and species limits in the iSclerurus mexicanusi  cJan-03-2017 a13 - 240 v1293 a

Phylogeographic analyses have hypothesized that Sclerurus (Furnariidae) populations of the rufous-throated clade (S. rufigularis and S. mexicanus sensu lato) have a long history of evolutionary isolation, particularly within the S. mexicanus complex (Tawny-throated Leaftosser). Although it has long been recognized that S. mexicanus should be split into two or more species, choosing between alternative species-delimitation schemes is much less clear due to minimal understanding of phenotypic variation and distributional range limits. We explored the extent of vocal variation between all described subspecies of S. mexicanus by analyzing spectral and temporal traits of songs and calls. We found five distinct vocal groups within S. mexicanus that differ primarily in their songs' maximum frequency, pace, and note shape. Specifically, we found that mexicanus, pullus, andinus, and obscurior each are vocally distinct from one another and from a group composed of macconnelli, peruvianus, and bahiae. Song traits of S. rufigularis overlapped with those of sympatric macconnelli and peruvianus and allopatric obscurior. The vocal distinctiveness patterns paralleled phylogeographic patterns and support a taxonomic scheme of treating S. mexicanus as five different species: S. mexicanus, S. pullus, S. obscurior, S. andinus, and S. macconnelli (including peruvianus and bahiae).

1 aCooper, Jacob, C.1 aCuervo, Andrés, M. uhttp://www.bioone.org/doi/10.1676/1559-4491-129.1.13