Bykovka, Vladimir Oblast

Bykovka (Быковка) is a rural locality (a village) in Gorod Vyazniki, Vyaznikovsky District, Vladimir Oblast, Russia. The population was 152 as of 2010.

Geography
Bykovka is located 5 km west of Vyazniki (the district's administrative centre) by road. Vyazniki is the nearest rural locality.

Paleontology
Numerous coprolites that possibly belong to therocephalians and proterosuchids were found in the Latest Permian deposits of Bykovka and described in 2016. Specimens contain elongated hollow structures that are interpreted as the remains of hair. This means therapsids were covered in hair as early as 252 million years ago, 80 million years earlier than the oldest owner of fur known before this discovery.