Exceptional fossils from Peru and an integrative phylogeny reconcile the evolutionary timing and mode of Gavialis and its kin

The acquisition of a long and slender snout (longirostry) resulted in extreme similar morphology across crocodylians and, therefore, raised a conflict between morphological and molecular phylogenetic hypotheses involving the longirostrine living gharials, Gavialis gangeticus and Tomistoma schlegelii. This discrepancy is not only topological but also concerns divergence time estimates for the crown clade Gavialidae, especially due to the inclusion of another longirostrine forms, ancient ‘thoracosaurs’—which introduces significant chronostratigraphic inconsistencies. To contribute to reconcile these contrasting lines of evidence, exceptionally preserved fossils of a new Miocene gavialid from Peru were included in a total-evidence Bayesian analysis. Our analysis integrates morphological, molecular, and chronostratigraphic data and incorporates most taxa of the largest adaptive radiation of gavialids, which occurred in the Cenozoic of South American and Caribbean (SAC). Our results demonstr..., , # Data from: Exceptional fossils from Peru and an integrative phylogeny reconcile the evolutionary timing and mode of *Gavialis* and its kin Dataset DOI: [10.5061/dryad.k6djh9wjz](10.5061/dryad.k6djh9wjz) ## Description of the data and file structure This is a zipped file containing: * (SF1) The morphological matrix in nexus format. * (SF2) The molecular matrix in nexus format. * (SF3) The executable BEAST file. The BEAST file was written for BEAST v.2.7.6. * (SF4) The final annotated tree. * (SF5) The R code to plot the tree using the *strap* package. * (SF6) The final .log file (used in the R code). Additionally, the Electronic_Supplementary_Material__FV.docx ### Files and variables #### File: Supplementary_files.zip **Description:** Here are available the morphological and data matrices, the executable BEAST file used to conduct the analyses, the final phylogenetic tree with its respective log file, as well as the code used to plot the tree. #### File: Electronic_Supplementa...,长吻（longirostry）性状的演化使得鳄形类（crocodylians）的形态结构呈现高度趋同，进而导致涉及现生长吻鳄类——恒河鳄（Gavialis gangeticus）与马来鳄（Tomistoma schlegelii）的形态学与分子系统发育假说之间产生冲突。这一差异不仅体现在拓扑结构层面，还关乎长吻鳄科（Gavialidae）冠群（crown clade）的分化时间估算；尤其是当纳入另一类长吻鳄类群——古生“胸甲鳄类”（thoracosaurs）时，会引发显著的年代地层学矛盾。 为调和这些相互矛盾的证据线索，研究将产自秘鲁的全新中新世长吻鳄类的特异保存化石纳入总证据贝叶斯分析（total-evidence Bayesian analysis）中。本分析整合了形态学、分子生物学及年代地层学数据，涵盖了发生于南美与加勒比海地区（SAC）新生代的最大规模长吻鳄类适应性辐射类群中的绝大多数分类单元。本研究结果显示……， ## 数据来源：《秘鲁特异保存化石与整合系统发育研究调和恒河鳄及其近缘类群的演化时序与模式》 数据集DOI：10.5061/dryad.k6djh9wjz ### 数据与文件结构说明 本数据集为压缩包，内含以下文件： * (SF1) Nexus格式的形态学矩阵 * (SF2) Nexus格式的分子学矩阵 * (SF3) 可执行BEAST文件，该文件适配BEAST v.2.7.6版本 * (SF4) 最终带注释的系统发育树 * (SF5) 用于调用strap包绘制系统发育树的R代码 * (SF6) 最终.log日志文件（供R代码调用） 此外，还包含Electronic_Supplementary_Material__FV.docx文件。 ### 文件与变量说明 #### 文件：Supplementary_files.zip **文件说明：** 内含形态学与分子学矩阵、用于开展分析的可执行BEAST文件、最终系统发育树及其配套日志文件，以及用于绘制系统发育树的代码。 #### 文件：Electronic_Supplementa……