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**Thresher (Paranomotodon angustidens)**

Age – Late Cretaceous; Commonality – Uncommon; Size – ¼ – ¾ inches

Thresher shark teeth are somewhat ignored by collectors, probably because their features are worn down easily by stream action, which causes them to be mistaken for a worn goblin, porbeagle, or sand tiger. Nice threshers are hard to come by. The crown is similar to Archaeolamna kopingensis teeth. The thresher crown is less robust and is thinner on the carinae. Thresher teeth have small vestigial cusplets, which look like small bumps on the shoulders of the tooth. They are almost like extensions of the crown. The thresher roots are slightly porous and have a large nutrient groove. The anterior tooth crowns are straight and the laterals are angled distally. The upper teeth are generally flatter and less robust than the lowers.

Symphyseal Tooth

Lingual View

Labial View

Profile View of Mesial Side

Profile View of Distal Side

Basal View

Occlusal View

This is a rather strange tooth. It is possibly a symphyseal P. angustidens. There is also the chance that it is a positional variation of a Protolamna borodini. In my opinion it matches better with this species.