Naugolnykh S.V.1, Parkhomenko E.A.2, Anikeev D.S.2 2025. A discovery of limulid traces from the Lower Triassic deposits of the Orenburg region, Russia // Arthropoda Selecta. Vol.34. No.2: 258–265 [in English].
1 Geological Institute of Russian Academy of Sciences, Pyzhevsky per. 7, Moscow 119017 Russia.
2 Samara Paleontological Society, Partizanskaya str. 172, apt. 17, Samara 443076 Russia.
Serge Naugolnykh: naugolnykh@list.ru ORCID https://orcid.org/0000-0001-6506-7319
doi:10.15298/arthsel.34.2.09
ABSTRACT. The paper focuses on the first record of the limulid traces found in the Lower Triassic deposits outcropped in the Mansurovo locality, Orenburg region, Southern Cis-Urals, Russia. This new finding is determined as Selenichnites cf. eotriassicus Naugolnykh, 2022. Comparative analysis of the studied ichnofossils shows that they are very similar both to the type specimens of Selenichnites eotriassicus Naugolnykh from the Lower Triassic deposits of the Volga River basin, and to the limulid traces Selenichnites sp. from the Jurassic deposits of Morocco. It is proposed that the traces Selenichnites cf. eotriassicus from the Mansurovo locality were left by a limulid (“horse-shoe crab”) of the genus Limulitella.
KEY WORDS: ichnology, limulids, horse-shoe crabs, Triassic, paleoecology, taphonomy, ahalytical reconstructions.