Where: Iran (32.3° N, 50.4° E: paleocoordinates 25.7° N, 45.4° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: NP24 nannofossil zone, Pabdeh Formation, Rupelian (33.9 - 28.1 Ma)

• Deposits of the Pabdeh Formation are generally assigned to the Eocene age. However, a study of the nanoplanktons and planktonic foraminifera from one section in the Babaheidar area, in which the pelagic bird was found (Peters and Hamedani 2000), indicated that the studied section is Rupelian (early Oligocene) in age (Hamrsmid and Rögl 2000). Nevertheless, a recent study of the planktonic microfauna from the other sections indicates a middle to late Eocene age (Garassino et al. 2014). It is quite possible that the very thick Pabdeh Formation covers a period ranging from the late Eocene to the early Oligocene. The fossil insects from Babaheidar area come from several localities. The exact stratigraphic position for some of them is unclear. However, the Orthoptera comes from the upper parts of the succession, early Oligocene in age. It is likely that other insects also come from these intervals because it is the most investigated part of the series for the fossil fishes that are frequently found in these layers.

• group of beds-level stratigraphic resolution

Environment/lithology: basinal (); lithified, argillaceous lime mudstone

Size class: macrofossils

Preservation: adpression

Collection methods: Repository: Palaeontological Collection of the Department of Geology, University of Isfahan, I.R. Iran (UIDG).

Primary reference: M. M. Ataabadi, A. Bahrami, M. Yazdi and A. Nel. 2019. A locust witness of a trans-oceanic Oligocene migration between Arabia and Iran (Orthoptera: Acrididae). Historical Biology 31:574-580 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 200817: authorized by Matthew Clapham, entered by Matthew Clapham on 19.04.2019

Creative Commons license: CC BY (attribution)