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Key innovations in ruminant evolution: a paleontological perspective

Integrative Zoology 2014年第4期9卷 412-433页

作者： daniel demiguel Beatriz AZANZA Jorge MORALES Catalan Institute of Paleontology Miquel Crusafont Autonomus University of BarcelonaBarcelonaSpain Department of Earth Sciences University of ZaragozaUniversity Research Institute in Environmental SciencesZaragozaSpain Department of Paleobiology National Museum of Natural SciencesMadridSpain

Key innovations are newly acquired structures that permit the performance of a new function and open new adaptive zones,and are,therefore,of paramount significance for understanding the history of the Ruminantia,particularly its diversification through the *** we review and discuss what is known about these evolutionary novelties,with special emphasis on the appearance and evolution of cranial appendages and high-crowned(or hypsodont)*** appendages probably favored the diversification of pecorans by being structures strongly related to sexual selection,whereas the acquisition of hypsodont teeth could have expanded potential dietary breadth and allowed species to extend diets into the grazing range without eliminating browsing as a potential *** analyzed in conjunction with patterns of faunal diversity and in the context of climatic changes,it seems that the overall view that ruminant cranial appendages and hypsodonty may have started responding to increased patterns of seasonality and the opening-up of ecosystems is roughly ***stead,they occurred through several distinct pulses and varied widely among *** review is,to our knowledge,the first to highlight that the evolution of these innovations has been far from constant and uniform through ***,we identify that both a first attempt to increase hypsodonty starting in the early Miocene and a first evolution of antlers and pronghorns were interrupted as a consequence of wide climatic fluctuations in the early-middle Miocene transition.

关键词： Artiodactyla climate change cranial appendages diversity hypsodonty

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On the relationship between hypsodonty and longevity in Myotragus balearicus–A comment on van der Geer (2014)

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Integrative Zoology 2015年第2期10卷 227-229页

作者： Xavier JORDANA daniel demiguel Meike KÖHLER Catalan Institute of Paleontology Miquel Crusafont Autonomus University of BarcelonaBarcelonaSpain Catalan Institution for Research and Advanced Studies(ICREA)at Catalan Institute of Paleontology Miquel Crusafont Autonomus University of BarcelonaBarcelonaSpain Department of Ecology University of BarcelonaBarcelonaSpain

In a recent paper published in a special issue of Integrative Zoology on‘Paleontology and evolution–part I.’(Palombo 2014),the author(van der Geer 2014)takes a review of the derived traits observed in endemic fossil insular mammals,including body size variation,cranial and postcranial changes,and modifications in *** one point in the discussion,the author misinterprets and seriously distorts statements by Jordana et al.(2012)on the relationship between hypsodonty and longevity in the fossil insular bovid Myotragus balearicus Bate,1909.

关键词： dont dis longe

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