Identifying isolated teeth of fossil selachians only based on qualitative characters is sometimes hindered by similarity in their morphology. resulting often in heated taxonomic debates. On the other hand. the use of quantitative characters (i. https://www.roneverhart.com/Western-Digital-Ultrastar-DC-HC550-WUH721816ALE6L0-0F38460-16TB-7-2K-RPM-SATA-6Gb-s-512e-ISE-3-5in-Hard-Drive/