Torres-Carvajal Omar
Natural History Museum & Biodiversity Research Center, The University of Kansas, Lawrence, Kansas 66045-7561, USA.
J Morphol. 2003 Jan;255(1):94-113. doi: 10.1002/jmor.10051.
In spite of the great diversity of iguanian lizards, detailed descriptions of their osteocrania and postembryonic development are rare. Herein, the adult cranial osteology of the tropidurid lizard Stenocercus guentheri and its postembryonic development are described based on cleared and double-stained and dry skeletal specimens from a single Ecuadorian population. The amphikinetic skull of S. guentheri is short and elevated and bears teeth on the premaxilla, maxillae, and pterygoids. Mandibular teeth are present on the dentaries. Ossification of the articular from Meckel's cartilage and growth of the parietal (ossification and investment of the frontoparietal fontanelle) are the most significant ontogenetic changes of the splanchnocranium and dermatocranium, respectively. The ossification of the cartilage separating the bones of the braincase is the most relevant postembryonic ontogenetic event of the neurocranium. The number of teeth does not vary ontogenetically and replacement teeth are present throughout postembryonic life. This study includes a list of the osteocranial characters of Stenocercus that have been used in systematic studies, as well as a discussion of functional morphology and kinesis.
尽管鬣蜥科蜥蜴种类繁多，但对它们的颅骨和胚胎后发育的详细描述却很少见。在此，基于来自厄瓜多尔单一群体的透明双染和干燥骨骼标本，描述了热带蜥蜴斯氏窄头蜥（Stenocercus guentheri）的成体颅骨学及其胚胎后发育。斯氏窄头蜥的两栖运动型头骨短而高，前颌骨、上颌骨和翼骨上有牙齿。齿骨上有下颌齿。麦氏软骨的关节骨化以及顶骨的生长（额顶囟门的骨化和包埋）分别是脏颅和皮颅最显著的个体发育变化。分隔脑壳骨骼的软骨骨化是神经颅最相关的胚胎后个体发育事件。牙齿数量在个体发育过程中不变，并且在整个胚胎后生命中都有替换牙。本研究包括了在系统研究中使用过的斯氏窄头蜥颅骨特征列表，以及对功能形态学和运动的讨论。
