A First Record of Lower Jurassic (Toarcian) Coleoid Jaws in Siberia

In the present paper, we describe several coleoid jaws discovered in lower Toarcian black shales, cropping out along Vilyui River (Yakutia, Russia). This is first record of a Lower Jurassic jaw outside Europe and report such finding from Mesozoic Siberia. The described demonstrate same mode preservation morphology as coeval previously reported Europe. Their Siberia became possible due to widespread occurrence shale facies associated with early oceanic anoxic event (TOAE).