Postcranial skeletal pneumaticity and air-sacs in the earliest pterosaurs
Postcranial skeletal pneumaticity and air-sacs in the earliest pterosaurs
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DOI：
10.1098/rsbl.2009.0139
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发表时间：
2009-08-23
期刊：
影响因子：
3.3
通讯作者：
Gower, David J.
中科院分区：
文献类型：
--
作者：
Butler, Richard J.;Barrett, Paul M.;Gower, David J.
颅后骨骼再生（PSP）的模式表明翼龙拥有鸟类呼吸系统的组成部分，包括一系列的呼吸气囊。然而，PSP在已知最古老的翼龙中的存在并没有被以前的研究明确证明。在这里，我们提供了第一个明确的文件PSP在晚三叠世和最早的侏罗纪翼龙。这表明PSP和由此推断的气囊可能存在于几乎所有已知翼龙的共同祖先中，并对鸟类始祖龙（包括恐龙）的呼吸系统进化有更广泛的影响。
Patterns of postcranial skeletal pneumatization (PSP) indicate that pterosaurs possessed components of a bird-like respiratory system, including a series of ventilatory air-sacs. However, the presence of PSP in the oldest known pterosaurs has not been unambiguously demonstrated by previous studies. Here we provide the first unequivocal documentation of PSP in Late Triassic and earliest Jurassic pterosaurs. This demonstrates that PSP and, by inference, air-sacs were probably present in the common ancestor of almost all known pterosaurs, and has broader implications for the evolution of respiratory systems in bird-line archosaurs, including dinosaurs.