对几种猫科的犬齿分析
Analysis of the saber-tooth morphology within the Felidae indicates that canines of various saber-toothed species grow differently. Stable oxygen isotopes analyzed from tooth enamel reveal that the scimitar-toothed Homotherium serum, which possessed short, broad sabers, had tooth crown growth rates similar to modern lions. This contrasts with the longer and thinner, dirk-toothed saber species in the genus Smilodon, S. gracilis and S. fatalis, which had much faster growth rates. With a more rapid growth rate, Smilodon reduced the total duration of crown growth to a period of time similar to that observed in modern lions, even though its tooth crown was twice as large. While comparable in overall morphology, developmental differences may reflect ecological differences among taxa bearing saber-toothed canines.
A) Panthera leo. B) Homotherium serum. C) Smilodon gracilis. D) Smilodon fatalis
A) Smilodon fatalis (UCMP 173179). B) S. fatalis (UCMP 158250). C) S. fatalis (UCMP 189603). D) S. gracilis (UF 87259). E) Homotherium serum (UCMP 41778)
(A) Panthera leo atrox (UCMP 189613); (B) P. leo (MVZ 155588)
Tooth crown growth rates and durations of growth in felid canines
大多是动物名，大家也都该认识，所以没翻译………………………………………………
A) Panthera leo. B) Homotherium serum. C) Smilodon gracilis. D) Smilodon fatalis
A) Smilodon fatalis (UCMP 173179). B) S. fatalis (UCMP 158250). C) S. fatalis (UCMP 189603). D) S. gracilis (UF 87259). E) Homotherium serum (UCMP 41778)
(A) Panthera leo atrox (UCMP 189613); (B) P. leo (MVZ 155588)
Tooth crown growth rates and durations of growth in felid canines
大多是动物名，大家也都该认识，所以没翻译………………………………………………
回复：2楼
我就知道smilodon的犬齿最长，而且你那个太复杂，虽说都是动物名，但有些也忘记了……
发张表格
Regression of mean species RW1 scores on mean species log centroid sizes. Regression line and 95% confidence intervals are calculated for Felinae only
我就知道smilodon的犬齿最长，而且你那个太复杂，虽说都是动物名，但有些也忘记了……
发张表格
Regression of mean species RW1 scores on mean species log centroid sizes. Regression line and 95% confidence intervals are calculated for Felinae only
我也陶到一件好东西……
This is a model of a Smilodon populator skull. A Smilodon populator was a sabre thoothed cat living in South America in the Pliocene(not sure about that one) 25-5 ma. ago. It was bigger than it's North American relative Smilodon fatalis.
I made this skull in clay on school and it's actually not very big, somewhat 15-20 cm long and 10 cm high when the mouth is closed. It took me long time making the theeth not too long and stuff. The eyesockets was the hardest though. They just didn't wanted to obey me. I used pics I found on the internet to have something to go after. The book "The Big Cats and their fossil relatives" written by Alan Turner and with the gorgeous^^ illustrations of Mauricio Anton helped me a lot(god, I love that book! *kisses book*). I also used my lynx skull to get the proportions right.
This is a model of a Smilodon populator skull. A Smilodon populator was a sabre thoothed cat living in South America in the Pliocene(not sure about that one) 25-5 ma. ago. It was bigger than it's North American relative Smilodon fatalis.
I made this skull in clay on school and it's actually not very big, somewhat 15-20 cm long and 10 cm high when the mouth is closed. It took me long time making the theeth not too long and stuff. The eyesockets was the hardest though. They just didn't wanted to obey me. I used pics I found on the internet to have something to go after. The book "The Big Cats and their fossil relatives" written by Alan Turner and with the gorgeous^^ illustrations of Mauricio Anton helped me a lot(god, I love that book! *kisses book*). I also used my lynx skull to get the proportions right.