| the niche and phylogeography of a passerine reveal the history of biological diversification between the andean and the atlantic forests. | the atlantic forest is separated from the andean tropical forest by dry and open vegetation biomes (chaco and cerrado). despite this isolation, both rainforests share closely related lineages, which suggest a past connection. this connection could have been important for forest taxa evolution. in this study, we used the saffron-billed sparrow (arremon flavirostris) as a model to evaluate whether the andean and the atlantic forests act as a refugia system, as well as to test for a history of biog ... | 2017 | 28385604 |
| taxonomic revision of saffron-billed sparrow arremon flavirostris swainson, 1838 (aves: passerellidae) with comments on its holotype and type locality. | the saffron-billed sparrow (arremon flavirostris) complex occurs in the undergrowth of deciduous woodlands and forests from the andes of bolivia and northern argentina to paraguay and southern, mid-western and interior eastern brazil. currently four subspecies are recognized: a. f. flavirostris, a. f. polionotus, a. f. devillii and a. f. dorbignii. we review the taxonomy of this complex by analyzing coloration and morphometrics of a series of 234 skins, and by comparing 101 sound recordings. our ... | 2016 | 27811707 |
| borrelia genospecies in ixodes sp. cf. ixodes affinis (acari: ixodidae) from argentina. | the aim of this work was to evaluate the presence of borrelia infection in ixodes sp. cf. ixodes affinis ticks from argentina. specimens of ixodes sp. cf. i. affinis were collected on vegetation and birds in five locations belonging the most humid part of the chaco biogeographic province. specimens were tested for borrelia infection by nested-pcr targeting the flab gene and the rrfa-rrlb intergenic spacer region (igs), sequenced and phylogenetically analyzed. a total of 48 ixodes sp. cf. i. affi ... | 2020 | 32993952 |