TY - JOUR

T1 - A lepidosauromorph specimen from the Middle Jurassic (Bathonian) Moskvoretskaya Formation of the Moscow Region, Russia

AU - Скучас, Павел Петрович

AU - Сенников, Андрей

AU - Сыромятникова, Елена

AU - Витенко, Дмитрий Дмитриевич

AU - Парахин, Игорь Алексеевич

AU - Бапинаев, Роман Альбертович

AU - Evans, Susan

PY - 2021/6/9

Y1 - 2021/6/9

N2 - A fragmentary diapsid left maxilla from the Bathonian Peski locality in Moscow Region, previously referred to Choristodera, is identified as Lepidosauromorpha indet. This specimen represents the first fossil record of basal lepidosauromorphs in the Middle Jurassic of European Russia. Among basal lepidosauromorphs, the maxilla from the Peski locality resembles those of the Middle Triassic Fraxinisaura and the contemporary Middle Jurassic (Bathonian) Marmoretta in subpleurodont tooth implantation, a relatively low dorsal process, and high keeled teeth with gently recurved apices and striae on the lingual side. This similarity suggests possible close relationships of Fraxinisaura, Marmoretta and the Peski form. The recognition of a basal lepidosauromorph in the fauna of the Peski locality extends the known geographical range of the Bathonian non-lepidosaurian lepidosauromorphs and demonstrates their wide Laurasian distribution at this time. It is additional evidence that Bathonian vertebrate faunas of Europe and Western Siberia were similar in composition.

AB - A fragmentary diapsid left maxilla from the Bathonian Peski locality in Moscow Region, previously referred to Choristodera, is identified as Lepidosauromorpha indet. This specimen represents the first fossil record of basal lepidosauromorphs in the Middle Jurassic of European Russia. Among basal lepidosauromorphs, the maxilla from the Peski locality resembles those of the Middle Triassic Fraxinisaura and the contemporary Middle Jurassic (Bathonian) Marmoretta in subpleurodont tooth implantation, a relatively low dorsal process, and high keeled teeth with gently recurved apices and striae on the lingual side. This similarity suggests possible close relationships of Fraxinisaura, Marmoretta and the Peski form. The recognition of a basal lepidosauromorph in the fauna of the Peski locality extends the known geographical range of the Bathonian non-lepidosaurian lepidosauromorphs and demonstrates their wide Laurasian distribution at this time. It is additional evidence that Bathonian vertebrate faunas of Europe and Western Siberia were similar in composition.

KW - Bathonian

KW - Lepidosauromorpha

KW - Middle jurassic

KW - Moscow Region

KW - Russia

KW - CHORISTODERAN REPTILE

KW - DIAPSIDA

KW - SKULL

UR - http://www.scopus.com/inward/record.url?scp=85107704476&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/18835dcf-a24d-3a7f-9443-777c2a189377/

U2 - 10.1080/08912963.2021.1935921

DO - 10.1080/08912963.2021.1935921

M3 - Article

JO - Historical Biology

JF - Historical Biology

SN - 0891-2963

ER -