Simões Tiago R
Setor de Paleovertebrados, Departamento de Geologia e Paleontolgia, Museu Nacional, Universidade Federal do Rio de Janeiro, Brasil.
An Acad Bras Cienc. 2012 Mar;84(1):79-94. doi: 10.1590/s0001-37652012000100008.
The record of Gondwanan Mesozoic lizards is very poor. Among the few species described for this region there is Tijubina pontei, an Early Cretaceous lizard from the Crato Formation (late Aptian) of northeast Brazil. Its description is very brief and lacks most of its diagnostic characters and clear delimitation from other lizard species. Here, a full redescription of the holotype is provided. T. pontei is demonstrated to be a valid species and a new diagnosis is provided with reference to Olindalacerta brasiliensis, a contemporary species of the Crato Formation. It lacks the posteroventral and posterodorsal processes of the dentary; the tibial/fibular length equals the femoral length and its posterior dentary teeth are robust, cylindrically based, unsculptured and bear no cuspids. The systematic position of T. pontei still needs further clarification, but preliminary analyses indicate that it lies in a rather basal position among the Squamata, similarly to O. brasiliensis.
冈瓦纳中生代蜥蜴的化石记录非常稀少。在为该地区描述的少数物种中，有蒂茹比纳庞氏蜥蜴（Tijubina pontei），一种来自巴西东北部克拉图组（阿普第晚期）的早白垩世蜥蜴。对它的描述非常简略，缺少大多数鉴别特征，也没有与其他蜥蜴物种的明确界定。在此，我们对其正模标本进行了全面的重新描述。蒂茹比纳庞氏蜥蜴被证明是一个有效物种，并参考克拉图组的同期物种巴西奥林达蜥蜴（Olindalacerta brasiliensis）给出了新的鉴别诊断。它没有齿骨的后腹侧和后背侧突起；胫/腓骨长度等于股骨长度，其齿骨后牙粗壮，基部呈圆柱形，无纹饰，也没有尖牙。蒂茹比纳庞氏蜥蜴的系统位置仍需进一步阐明，但初步分析表明，它在有鳞目动物中处于相当基部的位置，与巴西奥林达蜥蜴类似。
