More or less concentric lines of discontinuity in the cosmine of Dipnoi, probably due to cyclic resorption and redeposition during growth occurring on the bases of individual scales and also as large structures between headshield plates.[Fishbase]. [ https://www.fishbase.de/glossary/Glossary.php?q=Westoll+lines ]
Synonyms: Westoll lines
This is just here as a test because I lose it