School of Biological Sciences, The University of Adelaide, Adelaide, South Australia, Australia.
South Australian Museum, Adelaide, South Australia, Australia.
Anat Rec (Hoboken). 2019 Sep;302(9):1536-1543. doi: 10.1002/ar.24096. Epub 2019 Mar 7.
Australia provides abundant examples of continental-scale evolutionary radiations. The collision of two continental shelves around 30 Ma facilitated an influx of squamates and the subsequent squamate radiations resulted in high taxonomic diversity. The morphological disparity seen in these major squamate groups, however, remains underexplored. Here, we examine the major cranial proportions of over 1,000 specimens using 2D linear measurements to explicitly quantify the morphological disparity of Australian agamid lizards (Amphibolurinae) and compare it to that of agamid, acrodont, and iguanian clades from other parts of the world. Our results indicate the Australian Amphibolurinae have exceptionally high cranial disparity, and we suggest that this is linked to the relaxed selective environment that greeted the founders of Amphibolurinae when they first arrived in Australia. Anat Rec, 302:1536-1543, 2019. © 2019 American Association for Anatomy.
澳大利亚提供了大量大陆尺度进化辐射的例子。大约 3000 万年前，两个大陆架的碰撞促进了蜥蜴类动物的大量涌入，随后蜥蜴类动物的辐射导致了高分类多样性。然而，这些主要蜥蜴类群中看到的形态差异仍未得到充分探索。在这里，我们使用二维线性测量来检查超过 1000 个标本的主要颅骨比例，以明确量化澳大利亚鬣蜥（Amphibolurinae）的形态差异，并将其与来自世界其他地区的鬣蜥、齿突蜥和鬣蜥类群进行比较。我们的结果表明，澳大利亚 Amphibolurinae 的颅骨差异非常大，我们认为这与 Amphibolurinae 的祖先首次到达澳大利亚时所面临的宽松选择环境有关。解剖学记录，302:1536-1543, 2019. © 2019 美国解剖学会。
