The anhingas (Aves: Anhingidae) from the Upper Tertiary (Miocene–Pliocene) of southwestern Amazonia

Alvarenga, Herculano; Guilherme, Edson

doi:10.1671/1890

Cited by 40 publications

(49 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The whole list includes 225 genera, distributed as follows: 128 genera for the Mesopotamian, 75 for Laventan, 55 for Acre, and 33 for Urumaco. These disparities indicate that the Acre and Urumaco assemblages are well below their real diversity, as confirmed by the number of new taxa being described for the Acre region alone in recent years (Campbell et al, 2000;Carvalho et al, 2002;Alvarenga and Guilherme, 2003;Kay and Cozzuol, in press;Cozzuol et al, in press); many specimens representing new taxa still await study in the collections (personal observation). Table 1 presents similarity values using three coefficients for the assemblages, showing a maximum similarity between the Acre and Urumaco assemblages, followed by Acre and Mesopotamian.…”

Section: Relationshipsmentioning

confidence: 92%

The Acre vertebrate fauna: Age, diversity, and geography

Cozzuol

2006

Journal of South American Earth Sciences

162

144

View full text Add to dashboard Cite

Section: Relationshipsmentioning

confidence: 92%

The Acre vertebrate fauna: Age, diversity, and geography

Cozzuol

2006

Journal of South American Earth Sciences

162

144

View full text Add to dashboard Cite

“…Distinct impacts of sea level rises on different parts of Amazonia can thus also contribute to explain the observed lack of a river effect in southwestern Amazonia, as opposed to a strong river effect on the Brazilian shield. During sea level rises, ''clear-water'' rivers in geologically older and more stable parts of Amazonia (such as the Brazilian and 1313 AVIAN DIVERSIFICATION IN AMAZONIA Guianan shields) were even stronger barriers isolating blocks of terra-firme forest than today, while southwestern Amazonia was thoroughly inundated and covered extensively by floodplain forests (Alvarenga and Guilherme 2003). Thus, ''clear'' and ''black-water'' rivers on the Brazilian and Guianan shields have probably separated lineages of terrafirme species effectively for a much longer time than whitewater rivers in western Amazonia.…”

mentioning

confidence: 99%

Historical Diversification of a Terra-Firme Forest Bird Superspecies: A Phylogeographic Perspective on the Role of Different Hypotheses of Amazonian Diversification

2004

View full text Add to dashboard Cite

Abstract. Among those few hypotheses of Amazonian diversification amenable to falsification by phylogenetic and population genetics methods, three can be singled out because of their general application to vertebrates: the riverine barrier, the refuge, and the Miocene marine incursion hypotheses. I used phylogenetic and population genetics methods to reconstruct the diversification history of the upland (terra-firme) forest superspecies Xiphorhynchus spixii/elegans (Aves: Dendrocolaptidae) in Amazonia, and to evaluate predictions of the riverine barrier, refuge, and Miocene marine incursion hypotheses. Phylogeographic and population genetics analyses of the X. spixii/elegans superspecies indicated that the main prediction of the riverine barrier hypothesis (that sister lineages occur across major rivers) hold only for populations separated by ''clear-water'' rivers located on the Brazilian shield, in central and eastern Amazonia; in contrast, ''white-water'' rivers located in western Amazonia did not represent areas of primary divergence for populations of this superspecies. The main prediction derived from the refuge hypothesis (that populations of the X. spixii/elegans superspecies would show signs of past population bottlenecks and recent demographic expansions) was supported only for populations found in western Amazonia, where paleoecological data have failed to support past rainforest fragmentation and expansion of open vegetation types; conversely, populations from the eastern and central parts of Amazonia, where paleoecological data are consistent with an historical interplay between rainforest and open vegetation types, did not show population genetics attributes expected under the refuge hypothesis. Phylogeographic and population genetics data were consistent with the prediction made by the Miocene marine incursion hypothesis that populations of the X. spixii/elegans superspecies found on the Brazilian shield were older than populations from other parts of Amazonia. In contrast, the phylogeny obtained for lineages of this superspecies falsified the predicted monophyly of Brazilian shield populations, as postulated by the Miocene marine incursion hypothesis. In general, important predictions of both riverine barrier and Miocene marine incursion hypotheses were supported, indicating that they are not mutually exclusive; in fact, the data presented herein suggest that an interaction among geology, sea level changes, and hydrography created opportunities for cladogenesis in the X. spixii/elegans superspecies at different temporal and geographical scales.Key words. Aves, Amazonia, Miocene marine incursion hypothesis, phylogeography, population genetics, refuge hypothesis, riverine barrier hypothesis.Received March 10, 2003. Accepted February 10, 2004 The bird fauna of the Amazon lowlands in South America is the richest in the world, with over 1000 species, of which about 265 are endemic (Stotz et al. 1996;Nores 2000). As early as 1852, the British naturalist Alfred Russel Wallace put forward an evolutionary...

show abstract

“…The distal end of the humerus is unknown in M. ranzii (Alvarenga & Guilherme 2003) and in the extinct genera Meganhinga ( compared with living and fossil anhingids (measurements taken from Martin & Mengel 1975, Becker 1987, Rasmussen & Kay 1992, Noriega 1994, Alvarenga 1995, Campbell 1996, Alvarenga & Guilherme 2003. Asterisks indicate that the measurement is an estimation derived from an incomplete bone.…”

Section: Alcheringamentioning

confidence: 99%

“…Giganhinga sp. (Areta et al 2007), Anhinga minuta Alvarenga & Guilherme, 2003. In contrast to the abundant fossil record of darters, fossil anatid ducks are almost unknown in South America. This constrasts with modern avifaunas of the neotropics, which host the richest and most diverse anatid fauna in the world (Olson 1989).…”

mentioning

confidence: 99%