Where: Chubut, Argentina (42.5° S, 70.0° W: paleocoordinates 45.0° S, 60.0° W)

• coordinate stated in text

When: Ypresian (56.0 - 47.8 Ma)

• Ar-Ar dates between 52.84 and 51.91 Ma in Wilf et al. (2005), assigned to magnetic chron C23n.2r, C23n.2n, and C23n.1r.

Environment/lithology: crater lake; lithified tuff

Size class: macrofossils

Preservation: adpression

Collection methods: Repository: Museo La Plata

Primary reference: J. F. Petrulevičius and A. Nel. 2003. Frenguelliidae, a new family of dragonflies from the earliest Eocene of Argentina (Insecta: Odonata): phylogenetic relationships within Odonata. Journal of Natural History 37:2909-2917 [M. Clapham/J. Karr/M. Clapham]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 182917: authorized by Matthew Clapham, entered by Matthew Clapham on 28.11.2016, edited by Evangelos Vlachos

Creative Commons license: CC BY (attribution)