Character matrix used in phylogenetic analysis of Crocodylia

Character matrix used by Farke et al. (2014) for phylogenetic analysis of a specimen referred to the alligatoroid <em>Leidyosuchus </em>(RAM 14572, Raymond M. Alf Museum of Paleontology, Claremont, California, USA). The file is in TNT format (Goloboff et al., 2008), with 179 characters and 99 OTUs (operational taxonomic units). The matrix and character list were derived from that published by Brochu et al. (2012), with the additions of RAM 14527, <em>Diplocynodon deponiae</em>, <em>D. elavericus</em>, and <em>D. ungeri</em>. The coding for character 62 was changed from 1 to 0 in <em>Leidyosuchus canadensis</em> (Farke et al., 2014). The matrix was run in TNT 1.1 with the following settings: unordered characters, 1,000 replicates with 1,000 trees saved per replicate, TBR (Tree Bisection Reconnection), and <em>Bernissartia </em>as outgroup. 23,040 most parsimonious trees of 685 steps each were identified. For full methods and results, please see Farke et al. (2014). <strong>Citations</strong><br>Brochu, C. A., D. C. Parris, B. S. Grandstaff, R. K. Denton, and W. B. Gallagher. 2012. A new species of <em>Borealosuchus</em> (Crocodyliformes, Eusuchia) from the Late Cretaceous–early Paleogene of New Jersey. <em>Journal of Vertebrate Paleontology</em> 32:105–116. Farke, A. A., M. M. Henn, S. J. Woodward, and H. A. Xu. 2014. <em>Leidyosuchus</em> (Crocodylia: Alligatoroidea) from the Upper Cretaceous Kaiparowits Formation (late Campanian) of Utah, USA. <em>PaleoBios</em> 30(3): 72–88. http://escholarship.org/uc/item/0q11x9vs Goloboff, P.A., J.S. Farris, and K.C. Nixon. 2008. TNT, a free program for phylogenetic analysis. <em>Cladistics</em> 24:774–786.

Farke等人（2014）用于系统发育分析的性状矩阵，其研究标本为归入短吻鳄超科的莱氏鳄属（<em>Leidyosuchus</em>）的RAM 14572号标本，馆藏于美国加利福尼亚州克莱尔蒙特雷蒙德·M·阿尔夫古生物博物馆。
该数据集文件采用TNT格式（Goloboff等，2008），包含179个性状与99个操作分类单元（operational taxonomic units，OTU）。
本矩阵与性状列表源自Brochu等人（2012）发表的数据集，新增标本RAM 14527、德氏双脊鳄（<em>Diplocynodon deponiae</em>）、埃氏双脊鳄（<em>D. elavericus</em>）以及昂氏双脊鳄（<em>D. ungeri</em>）。
加拿大莱氏鳄（<em>Leidyosuchus canadensis</em>）的第62个性状编码由1修改为0（Farke等，2014）。
本矩阵使用TNT 1.1软件运行，参数设置如下：性状未排序，1000次重复搜索，每次搜索保存1000棵系统发育树，采用树二分-重连（Tree Bisection Reconnection，TBR）算法，以<em>Bernissartia</em>（贝尔尼萨尔特鳄）作为外类群。
最终共检索得到23040棵最简约树，单棵树的步长均为685。完整的研究方法与结果详见Farke等人（2014）。
<strong>引用文献</strong><br>
Brochu, C. A., D. C. Parris, B. S. Grandstaff, R. K. Denton, and W. B. Gallagher. 2012. 产自美国新泽西州晚白垩世至古新世早期的新种北方鳄属（<em>Borealosuchus</em>，鳄形超目，真鳄亚目）。《脊椎动物古生物学报》32:105–116.<br>
Farke, A. A., M. M. Henn, S. J. Woodward, and H. A. Xu. 2014. 产自美国犹他州上白垩统凯帕罗维茨组（晚坎潘期）的莱氏鳄属（<em>Leidyosuchus</em>，鳄目：短吻鳄超科）。《古生物学报》（<em>PaleoBios</em>）30(3):72–88. http://escholarship.org/uc/item/0q11x9vs<br>
Goloboff, P.A., J.S. Farris, and K.C. Nixon. 2008. TNT：一款免费的系统发育分析软件。《分支系统学》24:774–786.