Revista Brasileira de Ornitologia - Universidade Federal do Acre

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442Birds of the Brazilian state of Acre: diversity, zoogeography, and conservationEdson GuilhermeFamily/Species Locality Source CommentsSublegatus obscurior Peru Walker et al. 2006 Probable occurrenceAurundinicola leucocephala Acre Ridgely & Tudor, 1994 Requires confirmationKnipolegus hudsoni Bolivia Tobias & Seddon 2007 Probable occurrenceSatrapa icterophrys Peru Walker et al. 2006 Probable occurrenceVireonidaeHylophilus pectoralis 1 Acre Guilherme & Dantas 2011 ExcludedHylophilus semicinereus Amazonas Aleixo & Poletto (in litt.) Probable occurrenceHirundinidaeTachycineta leucorrhoa Peru Walker et al. 2006 Probable occurrenceProgne elegans Peru Walker et al. 2006 Probable occurrencePetrochelidon pyrrhonota Peru, Bolivia Walker et al. 2006; Tobias & Seddon 2007 Probable occurrenceTroglodytidaeMicrocerculus bambla Acre Ridgely & Tudor, 1994 Requires confirmationOdontorchilus sp. Acre Whitney et al. 1998 (in litt.) Requires confirmationPheugopedius coraya Acre Ridgely & Tudor, 1994 Requires confirmationCantorchilus griseus Acre Ridgely & Tudor, 1994 Requires confirmationHenicorhina leucosticta Acre Rasmussen et al. 2005 Requires confirmationPolioptilidaePolioptila sp. Amazonas Aleixo & Poletto (in litt.) Probable occurrenceTurdidaeCatharus fuscescens Acre Ridgely & Tudor 1994 Probable occurrenceTurdus nudigenis 2 Acre Aleixo & Guilherme 2010 ExcludedThraupidaeTangara cyanicollis Acre Whitney et al. 1998 (in litt.) Requires confirmationPipraeidea melanonota Acre Ridgely & Tudor 1994 Requires confirmationDacnis albiventris Peru Walker et al. 2006 Probable occurrenceConirostrum margaritae Bolivia Tobias & Seddon 2007 Probable occurrenceEmberizidaeSporophila hypoxantha Bolivia Tobias & Seddon 2007 Probable occurrenceSporophila ruficollis Bolivia Tobias & Seddon 2007 Probable occurrenceSporophila americana Acre Ridgely & Tudor 1994 Probable occurrenceSporophila nigricollis* Acre Ridgely &Tudor 1994 Probable occurrenceParulidaeDendroica striata Acre Ridgely & Tudor 1994 Requires confirmationOporornis agilis Acre Ridgely & Tudor 1994 Requires confirmationGeothlypis aequinoctialis Acre Forrester, 1993 Requires confirmationBasileuterus culicivorus Acre Whittaker et al. 2002, Supplement Requires confirmationIcteridaeAgelasticus xanthophthalmus Peru Walker et al. 2006 Probable occurrenceFringillidaeChlorophonia cyanea Acre Whittaker et al. 2002, Supplement Requires confirmation1, 2- The species Turdus nudigenis and Hylophilus pectoralis were, respectively, mistyped (Aleixo and Guilherme 2010) andmisidentified (Guilherme and Dantas 2011), and are thus excluded from the checklist of Acre birds.* Two photographs taken in Tarauacá (in December, 2010) were attributed to Sporophila nigricollis on the Wikiaves site.As I was not sure to determine whether this specimen represents S. nigricollis or Sporophila luctuosa, S. nigricollis wasmaintained in the secondary list until further documentary evidence is collected.Revista Brasileira de Ornitologia, 20(4), 2012
Revista Brasileira de Ornitologia, 20(4), 443-446Dezembro de 2012 / December 2012artigo/ARTICLEFirst record of Augastes scutatus for Bahia refines thelocation of a purported barrier promoting speciationin the Espinhaço Range, BrazilMarcelo Ferreira de Vasconcelos 1,3 , Anderson Vieira Chaves 2 and Fabrício Rodrigues dos Santos 21Pontifícia Universidade Católica de Minas Gerais. Pós-graduação em Zoologia de Vertebrados and Museu de Ciências Naturais. Avenida Dom JoséGaspar, 500, Prédio 41, Coração Eucarístico, CEP 30535-610, Belo Horizonte, MG, Brasil.2Universidade Federal de Minas Gerais. Departamento de Biologia Geral, Instituto de Ciências Biológicas. Caixa Postal 486, CEP 31270-901, BeloHorizonte, MG, Brasil.3Corresponding author: mfvasconcelos@gmail.com.Received on 13 October 2011. Accepted on 19 August 2012.ABSTRACT: First record of Augastes scutatus for Bahia refines the location of a purported barrier promoting speciation in theEspinhaço Range, Brazil. We present the first records of Augastes scutatus for the state of Bahia, whose range now is only 150 kmaway from that of its purported allospecies (A. lumachella). Based on geological evidence and vegetation cover, we suggest that thepossible vicariant barrier that led to the speciation of these allospecies would be represented by the Caetité plateau (covered mainlyby Cerrado) and the lowland areas of the Contas river valley (covered mainly by Caatinga), both in southern Bahia. Possibly, theisolation of those two species in different sectors of the Espinhaço Range (northern and southern parts) is related to climatic changesof the Plio-Pleistocene, which should led populations of an ancestral lineage to take refuge in these higher areas during one or moreinterglacial periods.KEY-WORDS: Augastes; biogeography; campos rupestres; geographical barrier; vicariance.INTRODUCTIONThe genus Augastes Gould, 1849 is represented bythree species: A. scutatus (Temminck, 1824), A. lumachella(Lesson, 1838) and A. geoffroyi (Bourcier, 1843)(Schuchmann 1999). Augastes scutatus and A. lumachellaare considered possible allospecies, both restricted to thecampos rupestres vegetation in the highlands of the EspinhaçoRange, eastern Brazil (Silva 1995, Sick 1997, Vasconcelos2008). Augastes scutatus is known to be restricted to thecentral and southern portions of the Espinhaço Range (inMinas Gerais state), while A. lumachella is distributed inthe northern section of this mountain range (ChapadaDiamantina region and northern mountains in Bahiastate; Ruschi 1962, 1963, Grantsau 1967, 1988, Silva1995, Sick 1997, Schuchmann 1999, Vasconcelos 2008,Souza et al. 2009). Both species of Augastes endemic to theEspinhaço Range are tightly linked to the campos rupestresflora (see Vasconcelos 2011), feeding on nectar and usingmaterial to build nests from various plant species endemicor typical of this vegetation type (Ruschi 1962, Grantsau1967, 1988, Vasconcelos & Lombardi 2001, Vasconceloset al. 2001, Machado et al. 2003, 2007, Rodrigues 2011).Augastes geoffroyi ranges in the Andean region, fromBolivia to Colombia and Venezuela (Ruschi 1963, Fjeldså& Krabbe 1990, Schuchmann 1999). Nevertheless, thereare doubts whether this species should be considered arepresentant of the genus Augastes or the genus Schistes(Schuchmann 1999), thus its evolutionary affinities stillneeds to be better studied under a phylogenetic perspective(see Abreu 2006).The mountains of the Espinhaço Range consistof an ancient unit belonging to the predominantlyquartzitic Espinhaço Supergroup, which was depositedin a continental rift (starting around 1,752 millionyears ago) and later metamorphosed and uplifted in theBrasiliano orogeny, between 650 and 550 million yearsago (Schobbenhaus 1996, Barbosa et al. 2003, Pedreira &De Waele 2008). With the tectonic events that resulted inthe fragmentation of Gondwanaland in the Mesozoic, theregion suffered differential movement and sag, with upliftof neighboring blocks. This movement was continued,but with less intensity, throughout the Cenozoic (Saadi1993, 1995, Uhlein et al. 1995, Horn et al. 1996, Potter1997, Ab’Sáber 2000, Cruz & Alkmim 2007, Knauer2007, Caxito et al. 2008).Considering both putative allospecies in easternBrazilian mountains (A. scutatus and A. lumachella), Silva
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