- Tytuł:
- Osteohistology of hyperodapedontine rhynchosaurs from the Upper Triassic of Southern Brazil
- Autorzy:
-
Veiga, F.H.
Soares, M.B.
Sayao, J.M. - Powiązania:
- https://bibliotekanauki.pl/articles/19977.pdf
- Data publikacji:
- 2015
- Wydawca:
- Polska Akademia Nauk. Instytut Paleobiologii PAN
- Tematy:
-
hyperodapedontine rhynchosaur
rhynchosaur
Diapsida
Archosauromorpha
Rhynchosauria
Hyperodapedontinae
bone histology
growth pattern
Triassic
Brazil - Opis:
- The first osteohistological study focused exclusively on rhynchosaurs (non-archosauriform archosauromorphs), based on the hyperodapedontines Teyumbaita sulcognathus and Hyperodapedon sp., from the Upper Triassic of Southern Brazil, indicates a relatively rapid growth rate in early ontogeny shown by the fibrolamellar complex, with a change to slow intermittent growth during late ontogeny represented by parallel-fibred bone with several growth marks. Contrary to previous studies, which described a typical non-archosaur reptilian bone tissue pattern for rhynchosaurs, with growth marks extending across the entire cortex, we demonstrate that, in both studied taxa, the initial growth rate was faster in comparison to the later. This suggests that the ability of rapid growth at high rates was already present in basal non-ar-chosauriform archosauromorphs.
- Źródło:
-
Acta Palaeontologica Polonica; 2015, 60, 4
0567-7920 - Pojawia się w:
- Acta Palaeontologica Polonica
- Dostawca treści:
- Biblioteka Nauki
Artykuł