Global evolutionary relationships of Devonian proetide trilobites

The Proetida likely represent the only trilobite surviving clade past the Devonian mass extinction event(s). Though members of order Proetida have long been studied, the global phylogenetic relationships across this pivotal time are still unresolved. I used a Bayesian phylogenetic approach to construct a subordinal level tree for members within superfamily Proetoidea. Two models, a relaxed and strict clock model, were compared and were used to assess past reconstructions of clades within the order. The trees from both models highlight key relationships among proetides across the Devonian and show paraphyly in groups which have been considered monophyletic in the past. Trees from both models also suggest that major groups, such as the genus Gerastos and the family Phillispidae (which represent the most diverse post-Devonian proetide group under current taxonomic schemes) are polyphyletic. This in turn suggests, in a paleobiological context, a more complex pattern of survivorship over the..., , # Global evolutionary relationships of Devonian proetide trilobites

Dataset DOI: [10.5061/dryad.fbg79cp7d](10.5061/dryad.fbg79cp7d)

## Description of the data and file structure

**Supplementary materials include**: character descriptions, coded characters, posterior probabilities in tables and on maximum-clade credibility trees, taxa and data collection information, FADS and LADS of taxa, and biogeography. The Nexus file is also provided. 

**Description of the Data and file structure**

Most data are presented as tables, including posterior probabilities and FADs, and LADs. Other data, such as character descriptions and coded characters, are presented as lists. Additional figures, such as posterior probabilities on the relaxed and strict maximum clade credibility trees and biogeographic locations of specimens, are included. 

### Files and variables

#### File: Proetida_final_updated.nex

**Description:** Nexus with coded characters. Characters and character descriptions can be foun...,

# 全球泥盆纪Proetida三叶虫的演化关系
Proetida目（Proetida）可能是泥盆纪大灭绝事件后仅存的三叶虫演化支。尽管Proetida目类群长期以来备受研究，但这一关键地质时期的全球系统发育关系仍未明确。本研究采用贝叶斯系统发育方法，构建了Proetoidea超科（Proetoidea）类群的亚目级系统发育树。研究对比了宽松分子钟模型与严格分子钟模型，并将其用于评估该目内演化支的既往重建结果。两种模型生成的系统发育树均揭示了泥盆纪前后Proetida类群的关键亲缘关系，并指出了既往被认定为单系群的类群存在并系现象。两类系统发育树还表明，Gerastos属（Gerastos）以及Phillispidae科（Phillispidae，当前分类体系中多样性最高的泥盆纪后Proetida类群）均属于多系群。这一结果从古生物学语境出发，暗示该类群在灭绝后的存活模式更为复杂……

数据集DOI：10.5061/dryad.fbg79cp7d

## 数据与文件结构说明
**补充材料包含**：性状描述、编码性状、以表格和最大分支置信度树形式呈现的后验概率、类群与数据收集信息、类群的首现地层数据（First Appearance Datums, FAD）与末现地层数据（Last Appearance Datums, LAD），以及生物地理学相关内容。此外还提供了Nexus格式文件。

**数据与文件结构说明**
多数数据以表格形式呈现，包括后验概率、FAD与LAD。其余数据如性状描述与编码性状则以列表形式展示。本数据集还包含附加图表，如宽松与严格最大分支置信度树上的后验概率标注，以及标本的生物地理分布位置。

### 文件与变量
#### 文件：Proetida_final_updated.nex
**描述**：包含编码性状的Nexus文件。性状及性状描述可详见……