Head et al. reply

  title={Head et al. reply},
  author={Jason J. Head and Jonathan I. Bloch and Alexander K. Hastings and Jason R. Bourque and Edwin Alberto Cadena and Fabiany Herrera and P. D. Polly and Carlos Jaramillo},
Replying to: J. M. K. Sniderman 460, 10.1038/nature08222 (2009); A. M. Makarieva, V. G. Gorshkov & B.-L. Li 460, 10.1038/nature08223 (2009); M. W. Denny, B. L. Lockwood & G. N. Somero 460, 10.1038/nature08224 (2009)Denny et al. and Sniderman question our use of body size in Titanoboa cerrejonensis as an equatorial temperature proxy during the Palaeocene, and Makarieva et al. suggest an adjustment to our temperature estimates. Denny et al. misinterpret the physiological model of our study and… 
A new blunt-snouted dyrosaurid, Anthracosuchus balrogus gen. et sp. nov. (Crocodylomorpha, Mesoeucrocodylia), from the Palaeocene of Colombia
A new exceptionally brevirostrine dyrosaurid is described from the middle Palaeocene Cerrejón Formation, northeastern Colombia, based on four partial skulls and associated postcrania, which indicates a deviation from surface-based predation to sub-surface predation as in modern Gavialis.
Global Warming and Neotropical Rainforests: A Historical Perspective
There is concern over the future of the tropical rainforest (TRF) in the face of global warming. Will TRFs collapse? The fossil record can inform us about that. Our compilation of 5,998 empirical
140 Million Years of Tropical Biome Evolution
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Recent glaciation at high elevations on Arsia Mons, Mars: Implications for the formation and evolution of large tropical mountain glaciers
[1] The ∼166,000 km2 fan-shaped deposit at Arsia Mons contains three characteristic facies (ridged, knobby, and smooth), which are interpreted as the depositional remains of a cold-based glacier that


Biased reptilian palaeothermometer?
It is shown that Varanus (Megalania) prisca, a large extinct lizard that lived in eastern Australia during the Late Pleistocene, was 3–4 times longer than predicted by the largest lizard species in the tropics today, which suggests that the scarcity of large predatory reptiles today may primarily be a function of competition with mammalian carnivores, rather than afunction of modern temperatures.
Re-calibrating the snake palaeothermometer
Arising from: J. J. Head et al. 457, 715–717 (2009)10.1038/nature07671; Head et al. replyIn a recent study a new proxy for palaeoclimate reconstructions was proposed on the basis of a theoretical
Can the giant snake predict palaeoclimate?
It is suggested that because of its ability to behaviourally control its body temperature, Titanoboa cannot serve as an accurate palaeothermometer.
A note on metabolic rate dependence on body size in plants and animals.
The agreement about the ubiquity of a1⁄4 3/4 in the living world has recently been seriously challenged by extensive analyses of data unavailable at the time of adopting the ‘‘3/4 rule’’.
Monitors , Mammals , and Wallace ’ s Line
Although varanid lizards have achieved parity with mammals in many parts of the world, they exploit very different metabolic strategies and sensory mechanisms, and are properly regarded as convergent
Temperature-associated upper limits to body size in terrestrial poikilotherms
We show that the largest tropical species of terrestrial poikilotherms from 25 taxa exceed, in linear body size, the largest representatives of the same taxa from the temperate (e.g. Great Britain)
A review of terrestrial mammalian and reptilian carnivore ecology in Australian fossil faunas, and factors influencing their diversity: the myth of reptilian domination and its broader ramifications
  • S. Wroe
  • Environmental Science, Geography
  • 2002
The accelerating pace of discovery of new large mammalian carnivore species has undermined any prima facie case for reptilian supremacy regarding pre-Pleistocene Australia, and available data expose the uncommon and geographically restricted large contemporaneous reptiles as bit players.
The scaling and temperature dependence of vertebrate metabolism
There is no universal metabolic allometry and models that attempt to explain only quarter-power scaling of metabolic rate are unlikely to succeed, according to compiled SMR measurements for 938 species spanning six orders of magnitude variation in mass.
Giant boid snake from the Palaeocene neotropics reveals hotter past equatorial temperatures
Depositional environments and faunal composition of the Cerrejón Formation indicate an anaconda-like ecology for the giant snake, and an earliest Cenozoic origin of neotropical vertebrate faunas.
Hot limpets: predicting body temperature in a conductance-mediated thermal system
A simple heat-budget model of the limpet Lottia gigantea is proposed, which predicts the daily maximal body temperatures of live limpets within a fraction of a degree, suggesting that it may be a useful tool for exploring the thermal biology of limpets and for predicting effects of climate change.