The Gamoneda Formation is an Emsian geologic formation of southern Bolivia. The approximately thick formation comprises marine micaceous grey siltstones and burrowed grey sandstones and shales.USNM loc. 20018 at Fossilworks.orgUSNM loc. 20022 at Fossilworks.orgUSNM loc. 20023 at Fossilworks.orgUSNM loc. 20024 at Fossilworks.orgScaphiocoelia Zone trilobites, Gamoneda Fm at Fossilworks.org
Fossil content The formation has provided the following fossils:
Acastoides gamonedensis Australocoelia palmata Australospirifer hawkinsi Australostrophia mesembria Bainella (Belenops) insolita Cryptonella baini Deltacephalaspis (Deltacephalaspis) comis Deltacephalaspis (Deltacephalaspis) retrospina Deltacephalaspis (Prestalia) tumida Derbyina jamesiana Gamonedaspis scutata Kozlowskiaspis (Romanops) australis Notiochonetes falklandica Phacopina convexa Plicoplasia planoconvexa Protoleptostrophia concinna Pustulatia curupira Schizostylus (Curuyella) granulata Tarijactinoides jarcasensis Burmeisteria sp. cf. Francovichia sp. Calmoniidae indet. Eurypterida indet.
See also List of fossiliferous stratigraphic units in Bolivia
References
Further reading N. Eldredge and L. Branisa. 1980. Calmoniid trilobites of the Lower Devonian Scaphiocoelia Zone of Bolivia, with remarks on related species. Bulletin of the American Museum of Natural History 165(2):181-289 P. E. Isaacson. 1977. Devonian stratigraphy and brachiopod paleontology of Bolivia. part A: Orthida and Strophomenida. Palaeontographica Abteilung A 155(5-6):133-192