作者: Emily A. Buchholtz , H. Grady Bailin , Susan A. Laves , Jennifer T. Yang , Mei-Yee Chan
DOI: 10.1111/J.1525-142X.2012.00560.X
关键词:
摘要: Why is mammalian cervical count fixed across the historically long and ecologically broad mammalian radiation? Multiple lines of evidence, considered together, suggest a link between fixed cervical count and the muscularization of the diaphragm, a key innovation in mammalian history. We test this hypothesis by documenting the anteroposterior (AP) movement of the diaphragm, a lateral plate derivative, relative to that of the somitic thoracolumbar transition in unusually patterned mammals, by comparing the temporal …