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)
Taxonomic list
Angiospermae | |
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