Table 2. Predicted G_H2O values (in mgH20/day·Torr) for the Comahue eggs (based on Table 1 and formulae in [15]) alongside those for other taxa from previous studies (i.e., G_H2O values estimated using pore counts from egg shell thin sections).

Source	Locality	Egg	GH2O
This study	Neuquén, Argentina	Neuquenornis volans (enantiornithine bird)	4.39
Sabath (1991)	Gobi Desert, Mongolia	Gobipteryx minuta (enantiornithine bird)	2.7
Deeming (2006)	Portugal	Lourinhanosaurus antunesi (theropod)	541
Deeming (2006)	China	Macroelognatoolithus xixianensis ( theropod)	600
Deeming (2006)	Canada	Prismatoolithus levis (troodontid theropod)	39
Deeming (2006)	Gobi Desert, Mongolia	Gobipteryx minuta (enantiornithine bird)	2.5
Ar et al. (1974)	Africa	Struthio camelus (ostrich)	105
Ar et al. (1974)	Australia	Dromiceius novaehollandiae (emu)	51.8
Ar et al. (1974)	Holartic	Larus argentatus (herring gull)	16.5
Ar et al. (1974)	Cosmopolitan	Gallus gallus (domestic chiken)	14.4
Ar et al. (1974)	Asia	Phasianus colchicus (ring-necked phaesant)	6.6
Ar et al. (1974)	East Asia	Coturnix coturnix (Japanese quail)	3.1
Ar et al. (1974)	North America	Quisculus quiscula (common grackle)	2.3
Ar et al. (1974)	Cosmopolitan	Passer domesticus (house sparrow)	0.9

Note that: (1) because different approaches were used to predict G_H2O values (regressions versus pore counts from thin sections) they may not be comparable; and (2) value shown for G. minuta is that predicted when compared to an avian egg of similar size, not G_H2O, which has been estimated to range from 63.9 [11] to 22.4 [14]. See [11] for further discussion.