New observations on the squamation patterns of articulated specimens of Loganellia scotica (Traquair, 1898) (Vertebrata: Thelodonti) from the Lower Silurian of Scotland

Geodiversitas

Živile Žigaitė¹  Daniel Goujet¹ 

关键词: Thelodonti;    articulated squamation;    thelodonts;    early vertebrates;    Lower Silurian;    Scotland;    Thelodonti;    squamation complète;    thélodontes;    vertébrés inférieurs;    Silurien intérieur;    Écosse;   

DOI  :  10.5252/g2012n2a1

学科分类：生物科学（综合）

来源: Museum National d Histoire Naturelle

【 摘 要 】

ArticulatedsquamationsofLoganelliascotica(Traquair,1898)fromtheLowerSilurianLesmahagowinliersofsouthernScotlandhavebeenstudied.Theyincludesevenarticulatedspecimens,threeofthemrepresentingcompletethelodontfossils,andfourpartiallypreservedpostpectoral,precaudalandcaudalpartsoftheexoskeleton.Allthefivemaintypesofthelodontscalesthatisrostral,cephalo-pectoral,postpectoral,precaudalandpinnalsacles,aswellasrespectivesquamationpatternshavebeenobservedonarticulatedspecimens.Thespecificorbital,branchial,andbucco-pharyngealscales,characteristicofL.scotica,havenotbeenfoundduetothepoorornon-preservationoftheseparticularareaswithinthespecimensstudied.Tailmorphologyandsquamationpatternofthecaudalfinhavebeenstudiedwithparticularattention,andtheconstitutionofthecaudalfinrayshasbeenanalyzed.TherostralsquamationpatternisarguedtobecharacteristictoL.scotica.

【 授权许可】

Unknown