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Gigantothermy (sometimes called ectothermic homeothermy or inertial homeothermy) is a phenomenon with significance in biology and paleontology, whereby large, bulky ectothermic animals are more easily able to maintain a constant, relatively high body temperature than smaller animals by virtue of their smaller surface-area-to-volume ratio. [1]
Feathered theropods are probably the best candidates for dinosaur endothermy, yet the examined theropods had relatively low body temperatures 32.0 °C (89.6 °F). Large sauropods had higher body temperatures 37.0 °C (98.6 °F), which may be reflective of mesothermic gigantothermy.
Skull of E. mirabilis. Estemmenosuchus could reach a body length of more than 3 m (10 ft). [2] Its skull was long and massive, up to 65 cm (26 in) in length, [2] and possessed several sets of large horns, somewhat similar to the antlers of a moose, growing upward and outward from the sides and top of the head.
The group that includes mammals and birds, both "warm-blooded" homeothermic animals (in red) is polyphyletic.. Homeothermy, homothermy or homoiothermy [1] is thermoregulation that maintains a stable internal body temperature regardless of external influence.
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The common frog is a poikilotherm and is able to function over a wide range of body core temperatures.. A poikilotherm (/ ˈ p ɔɪ k ə l ə ˌ θ ɜːr m, p ɔɪ ˈ k ɪ l ə ˌ θ ɜːr m /) is an animal (Greek poikilos – 'various', 'spotted', and therme – 'heat') whose internal temperature varies considerably.
Examination of a 9 m (30 ft) giant squid, the second largest cephalopod, that washed ashore in Norway in 1954 In zoology, deep-sea gigantism or abyssal gigantism is the tendency for species of deep-sea dwelling animals to be larger than their shallower-water relatives across a large taxonomic range.
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