Where: Ethiopia (12.5° N, 37.1° E: paleocoordinates 10.1° N, 34.3° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Late/Upper Oligocene (28.4 - 23.0 Ma)

• Compression fossils, including the specimen discussed herein, were excavated from a 22 to 36 cm thick, greenish-gray to yellow-green massive mudstone layer within the section. All of these fossils are dated to 27.23 ± 0.1Ma by a 206Pb/238U analysis of zircon crystals extracted from an ash layer stratigraphically correlated with the mudstone (Pan 2010).

• bed-level stratigraphic resolution

Environment/lithology: pond; lithified, massive, gray, green, yellow mudstone

Size class: macrofossils

• Here, we describe a new fossil specie from the late Oligocene (27.23 Ma) Guang River flora which represent the first fossil records of a compound-leaved yam, Dioscorea section Lasiophyton (Uline) Wilkin & Caddick.

Preservation: mold/impression, adpression, original cellulose

Collection methods: hydrochloric, hydroflouric,

• Repository: Chilga collections, National Museum of Ethiopia, Addis Ababa, Ethiopia. Microscope slides prepared from the fossil and herbarium samples are housed in the Roy M. Huffington Depart- ment of Earth Sciences at Southern Methodist University in Dallas, TX, USA.

Primary reference: A. Pan, B. Jacobs, and E. Currano. 2014. Dioscoreaceae fossils from the late Oligocene and Miocene Ethiopia. Botanical Journal of the Linnean Society (175)17-28 [C. Jaramillo/C. Jaramillo/R. Bush]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 169320: authorized by Carlos Jaramillo, entered by Carlos Jaramillo on 18.05.2015

Creative Commons license: CC BY (attribution)