Variability of the Dermal Elements of the Pectoral Girdle in Platyoposaurus (Temnospondyli, Archegosauridae) from the Middle Permian of Eastern Europe

A. V. Uliakhin
{"title":"Variability of the Dermal Elements of the Pectoral Girdle in Platyoposaurus (Temnospondyli, Archegosauridae) from the Middle Permian of Eastern Europe","authors":"A. V. Uliakhin","doi":"10.26907/2542-064x.2021.2.238-250","DOIUrl":null,"url":null,"abstract":"The variability of the dermal elements of the pectoral girdle (clavicle, interclavicle), as the most morphologically informative part of the postcranial skeleton in the archegosaurid amphibian Platyoposaurus from the Middle Permian of Eastern Europe, was studied. Based on the considered morphological characters of the clavicle and interclavicle in P. watsoni , the increasing complexity of ornamentation of the dermal elements (a growth of the cellular area in the ossification center as additional cells appear, more complex branching of the radial grooves) with size was established for the first time using the morphometric parameters. The age-related ornament transformation favored the acquisition of additional strength with an increase in the load on the shoulder girdle during the growth process and in the body weight. It was found that the structural characters of the cellular area and radial ridges and also the morphometric parameters (lateral inclination angle of the dorsal process, the ratio of the width of the interclavicle plate to its length from the posterior end to the ossification center) can serve as additional diagnostic features to distinguish both Platyoposaurus from others archegosauroids and between the species of the genus under consideration. Individual differences were detected mainly in the analysis of the structure of the dorsal process of the same-sized clavicles: the lamina posterior is straightened or arcuate; the lamina anterior is straight or arcuate.","PeriodicalId":23418,"journal":{"name":"Uchenye Zapiski Kazanskogo Universiteta. Seriya Estestvennye Nauki","volume":null,"pages":null},"PeriodicalIF":0.4000,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Uchenye Zapiski Kazanskogo Universiteta. Seriya Estestvennye Nauki","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.26907/2542-064x.2021.2.238-250","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MULTIDISCIPLINARY SCIENCES","Score":null,"Total":0}
引用次数: 0

Abstract

The variability of the dermal elements of the pectoral girdle (clavicle, interclavicle), as the most morphologically informative part of the postcranial skeleton in the archegosaurid amphibian Platyoposaurus from the Middle Permian of Eastern Europe, was studied. Based on the considered morphological characters of the clavicle and interclavicle in P. watsoni , the increasing complexity of ornamentation of the dermal elements (a growth of the cellular area in the ossification center as additional cells appear, more complex branching of the radial grooves) with size was established for the first time using the morphometric parameters. The age-related ornament transformation favored the acquisition of additional strength with an increase in the load on the shoulder girdle during the growth process and in the body weight. It was found that the structural characters of the cellular area and radial ridges and also the morphometric parameters (lateral inclination angle of the dorsal process, the ratio of the width of the interclavicle plate to its length from the posterior end to the ossification center) can serve as additional diagnostic features to distinguish both Platyoposaurus from others archegosauroids and between the species of the genus under consideration. Individual differences were detected mainly in the analysis of the structure of the dorsal process of the same-sized clavicles: the lamina posterior is straightened or arcuate; the lamina anterior is straight or arcuate.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
东欧中二叠世鸭嘴龙(Temnospondyli,太古龙科)胸带真皮成分的变异
本文研究了东欧中二叠纪始古两栖类鸭嘴龙(Platyoposaurus)颅后骨骼中形态信息最丰富的部分——胸带(锁骨、锁骨间)皮肤成分的变异。在研究了水蛭锁骨和锁骨间的形态学特征的基础上,首次利用形态计量学参数确定了表皮元素纹饰的复杂性(骨化中心的细胞面积随着额外细胞的出现而增加,径向凹槽分支更加复杂)随尺寸的增加。随着生长过程中肩带负荷的增加和体重的增加,与年龄相关的装饰变化有利于获得额外的力量。发现细胞面积和径向脊的结构特征以及形态计量学参数(背突侧倾角、锁骨间板从后端到骨化中心的宽度与长度之比)可以作为附加的诊断特征,以区分Platyoposaurus与其他始祖龙以及所研究属的种之间。个体差异主要体现在对相同大小锁骨背突结构的分析上:后椎板呈伸直或弓形;前椎板直或呈弓形。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
CiteScore
0.70
自引率
0.00%
发文量
0
审稿时长
17 weeks
期刊最新文献
Insights into the Health Effects of Acrolein and Crotonaldehyde in Russian Smokers Switching from Regular Cigarettes to Heated Tobacco Products Evaluation of the Antioxidant Properties and GC-MSD Analysis of Commercial Essential Oils from Plants of the Lamiaceae Family Magnetic and Structural Properties of Iron Oxide Nanoparticles Produced by Thermal Decomposition of Precursors in Solution α-Carboxylate Phosphabetains in Alkylation and Complexation Reactions Surface Microtextures of Quartz Grains and Origin of the Paleogene Sands in the Ulyanovsk-Syzran Volga Region
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1