Data on Callovian and Upper Jurassic belemnites from West Siberian boreholes are summarized. New belemnite findings are depicted and described. Ten species known in the Callovian-Upper Jurassic of neighboring boreal and subboreal regions (three of them are in the binary nomenclature) are recognized. Several specimens have not been identified into species. Nearly all known Callovian and Upper Jurassic belemnites from West Siberian boreholes belong to the family Cylindroteuthidae. The presence of the family Belemnopsidae in the belemnite assemblages is indicated by only two specimens of the genus Hibolithes. The described belemnite species and assemblages can be used for stratigraphic subdivision of the Callovian and Upper Jurassic in West Siberian boreholes. Four biostratons in the rank of beds with belemnites have been recognized: beds with Lagonibelus beaumontianus (upper part of the Upper Bathonian-Callovian); beds with Pachyteuthis panderiana and Cylindroteuthis oweni cuspidata (Upper Oxfordian–Kimmeridgian); beds with Pachyteuthis ingens and Lagonibelus kostromensis (Kimmeridgian); and beds with Pachyteuthis ex gr. mamillaris–insignis (Volgian). Beds with belemnites are not recognized in the Lower and Middle Oxfordian of West Siberia because of the lack of evidence.

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