Road N-260, ESE of Fanlillo, Yebra de Basa (Eocene of Spain)

Where: Aragón, Spain (42.5° N, 0.2° W: paleocoordinates 41.2° N, 3.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Margas de Pamplona Formation, Priabonian (38.0 - 33.9 Ma)

• Jaca Basin. Data on the biostratigraphy (Canudo & Molina, 1988; Canudo et al., 1988) and magnetostratigraphy (Hogan, 1991) indicate a Bartonian-Priabonian age for the Margas de Pamplona Formation, and the calibration of Pueyo-Morer et al. (2002), establish the lower and upper limits of this formation from 40.32 to 37.17 mya which corresponds to a Bartonian-early Priabonian age. Sometimes called Margas de Arguís Formation.

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal; poorly lithified marl

• Alternation of low-energy and high-energy beds suggests deposition above storm wave base but below fair-weather wave base.
• Marl

Size class: macrofossils

Collection methods: Repository: MPZ, Museo Paleontológico de Zaragoza, Spain

Primary reference: À Ossó, J. L. Domínguez, and P. Artal. 2014. Pyreneplax basaensis new genus, new species (Decapoda, Brachyura, Vultocinidae) from the Priabonian (Late Eocene) of the Pyrenees of Huesca (Aragón, Spain), and remarks on the genus Lobonotus A. Milne-Edwards, 1863. Treballs del Museu de Geologia de Barcelona 20:33-43 [M. Uhen/M. Uhen/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 209381: authorized by Mark Uhen, entered by Mark Uhen on 01.05.2020, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Malacostraca
 Decapoda - Dromiidae
Basadromia longifrons n. gen. n. sp.1
Basadromia longifrons n. gen. n. sp.1 Artal et al. 2016 crab
 Decapoda - Dynomenidae
Dynomene collinsi n. sp.5 Ossó et al. 2020 crab
 Decapoda - Epialtidae
Eoparanaxia eocenica n. gen. n. sp.2
Eoparanaxia eocenica n. gen. n. sp.2 Ferratges et al. 2023 spider crab
 Decapoda - Majidae
Spinirostrimaia echinata n. sp.2 Ferratges et al. 2023 spider crab
 Decapoda - Macrocheiridae
? Macrocheira sp.2 De Haan 1839 spider crab
 Decapoda -
"Eoacantholobulus oscensis n. gen. n. sp." = Sculptoplax oscensis4
"Eoacantholobulus oscensis n. gen. n. sp." = Sculptoplax oscensis4 Ossó and Domínguez 2017 crab
 Decapoda - Parthenopidae
Phrynolambrus sagittalis n. sp.3 Ferratges et al. 2023 crab
 Decapoda - Vultocinidae
Pyreneplax basaensis n. gen. n. sp.
Pyreneplax basaensis n. gen. n. sp. Ossó et al. 2014 crab