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Obruchevia

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DiBgd
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Description

Obruchevia heckeri - biggest known agnathan. Dorsal shield of officially described specimens was about 60 cm wide, but rumors about shields over 1 m wide exists. From Late Devonian (Franian) of Novgorod region (Lovat river).
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Comments7
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avancna's avatar
avancna
I thought Pycnosteus was larger, with the average individual is about 1 meter wide.