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New observations on the squamation patterns of articulated specimens of Loganellia scotica (Traquair, 1898) (Vertebrata: Thelodonti) from the Lower Silurian of Scotland
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Evolution and Developmental Biology. (Ahlberg Lab)
Museum National Histoire Naturelle.
2012 (English)In: Geodiversitas, ISSN 1280-9659, Vol. 34, no 2, 253-270 p.Article in journal (Refereed) Published
Abstract [en]

Articulated squamations of Loganellia scotica (Traquair, 1898) from the Lower Silurian Lesmahagow inliers of southern Scotland have been studied. They include seven articulated specimens, three of them representing complete thelodont fossils, and four partially preserved postpectoral, precaudal and caudal parrs of the exoskeleton. All the five main types of thelodont scales that is rostral, cephalo-pectoral, postpectoral, precaudal and pinnal sacles, as well as respective squamation patterns have been observed on articulated specimens. The specific orbital, branchial, and bucco-pharyngeal scales, characteristic of L. scotica, have not been found due to the poor or non-preservation of these particular areas within the specimens studied. Tail morphology and squamation pattern of the caudal fin have been studied with particular attention, and the constitution of the caudal fin rays has been analyzed. The rostral squamation pattern is argued to be characteristic to L. scotico.

Place, publisher, year, edition, pages
2012. Vol. 34, no 2, 253-270 p.
Keyword [en]
Thelodonti, articulated squamation, thelodonts, early vertebrates, Lower Silurian, Scotland
National Category
Earth and Related Environmental Sciences
URN: urn:nbn:se:uu:diva-179942DOI: 10.5252/g2012n2a1ISI: 000306574400001OAI: oai:DiVA.org:uu-179942DiVA: diva2:547086
Available from: 2012-08-27 Created: 2012-08-27 Last updated: 2013-10-16Bibliographically approved

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