Reiss J O
Museum of Comparative Zoology, Harvard University, Cambridge, Massachussetts, USA.
J Morphol. 1998 Dec;238(3):343-53. doi: 10.1002/(SICI)1097-4687(199812)238:3<343::AID-JMOR6>3.0.CO;2-B.
The nasal placode was extirpated unilaterally in Gosner stage 18-20 embryos of Rana sylvatica, R. palustris and R. pipiens, in order to test alternative proposed schemes of homology for the ethmoidal attachment of the palatoquadrate in anurans and urodeles. Absence of the nasal sac has no pronounced effect on the formation of larval chondrocranial structures. In contrast, in metamorphosed animals the lamina orbitonasalis and inferior prenasal process are the only nasal capsule structures present on the operated side. The medial nasal branch of the deep ophthalmic nerve passes forward over the dorsal surface of the lamina orbitonasalis, rather than through an orbitonasal foramen. Comparison with previous experimental work on urodeles supports the traditional homology of the anuran lamina orbitonasalis with the antorbital process of urodeles and other vertebrates.
为了测试关于无尾目和有尾目动物腭方骨筛骨附着的同源性的其他提议方案，在林蛙、牛蛙和豹蛙处于戈斯纳18 - 20期的胚胎中单侧切除鼻基板。鼻囊缺失对幼虫软骨颅结构的形成没有显著影响。相反，在变态后的动物中，眶鼻板和鼻前下突是手术侧仅有的鼻囊结构。眼深神经的鼻内侧支向前越过眶鼻板的背表面，而不是通过眶鼻孔。与之前关于有尾目的实验工作进行比较，支持了无尾目眶鼻板与有尾目及其他脊椎动物眶前突的传统同源性。
