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Santa Juana, Concepción Province, Bíobío, Chile

Formation	Santa Juana
Age:	237 - 228 Ma Late/Upper Triassic
Interval	Carnian
Tectonic Setting	Rift
Lithology	mudstone, siltstone/mudstone, siltstone, sandstone/siltstone
Number of Collections	4
Number of Occurrences	26

Recorded Sample Locations

Location	Region	Stratigraphic Name
Santa Juana	Concepción Province, Bíobío, Chile	Santa Juana
Cerro Calquinhue	Concepción Province, Bíobío, Chile	Santa Juana
Road between Quilacoya and Chillancito	Concepción Province, Bíobío, Chile	Santa Juana
Near Patagual	Concepción Province, Bíobío, Chile	Santa Juana

Recorded Fossils

Accepted Name	Type	Hierarchy	Age
Asterotheca fuchsii species	7	Plantae : Asterotheca : *Asterotheca fuchsii*	237 - 228 Ma Late/Upper Triassic
Antevsia sp. genus	6	Plantae : Peltaspermophyta : Peltaspermopsida : Peltaspermales : Peltaspermaceae : *Antevsia*	237 - 228 Ma Late/Upper Triassic
Sphenobaiera africana species	7	Plantae : Tracheophyta : Ginkgoopsida : Ginkgoales : Karkeniaceae : Sphenobaiera : *Sphenobaiera africana*	237 - 228 Ma Late/Upper Triassic
Dicroidium sp. genus	6	Plantae : Peltaspermophyta : Peltaspermopsida : Peltaspermales : Umkomasiaceae : *Dicroidium*	237 - 228 Ma Late/Upper Triassic
Dicroidium crassinervis species	7	Plantae : Peltaspermophyta : Peltaspermopsida : Peltaspermales : Umkomasiaceae : Dicroidium : *Dicroidium crassinervis*	237 - 228 Ma Late/Upper Triassic
Dicroidium elongatum species	7	Plantae : Peltaspermophyta : Peltaspermopsida : Peltaspermales : Umkomasiaceae : Dicroidium : *Dicroidium elongatum*	237 - 228 Ma Late/Upper Triassic
Dicroidium odontopteroides species	7	Plantae : Peltaspermophyta : Peltaspermopsida : Peltaspermales : Umkomasiaceae : Dicroidium : *Dicroidium odontopteroides*	237 - 228 Ma Late/Upper Triassic
Heidiphyllum elongatum species	7	Plantae : Pinophyta : Heidiphyllum : *Heidiphyllum elongatum*	237 - 228 Ma Late/Upper Triassic
Telemachus elongatus species	7	Plantae : Pinophyta : Telemachus : *Telemachus elongatus*	237 - 228 Ma Late/Upper Triassic
Rissikia media species	7	Plantae : Pinophyta : Pinopsida : Pinales : Podocarpaceae : Rissikia : *Rissikia media*	237 - 228 Ma Late/Upper Triassic
Kurtziana cacheutensis species	7	Plantae : Pteridospermophyta : Kurtziana : *Kurtziana cacheutensis*	237 - 228 Ma Late/Upper Triassic
Menucoestheria terneraensis species	7	Animalia : Arthropoda : Branchiopoda : Diplostraca : Eosestheriidae : Menucoestheria : *Menucoestheria terneraensis*	237 - 228 Ma Late/Upper Triassic
Polygrapta troncosoi species	7	Animalia : Arthropoda : Branchiopoda : Diplostraca : Polygraptidae : Polygrapta : *Polygrapta troncosoi*	237 - 228 Ma Late/Upper Triassic
Ademosyne sp. genus	6	Animalia : Arthropoda : Insecta : Protocoleoptera : Ademosynidae : *Ademosyne*	237 - 228 Ma Late/Upper Triassic
Ischichucasyne santajuanaensis species	7	Animalia : Arthropoda : Insecta : Protocoleoptera : Permosynidae : Ischichucasyne : *Ischichucasyne santajuanaensis*	237 - 228 Ma Late/Upper Triassic
Bandelnielsenia chilena species	7	Animalia : Arthropoda : Insecta : Hemiptera : Dysmorphoptilidae : Bandelnielsenia : *Bandelnielsenia chilena*	237 - 228 Ma Late/Upper Triassic
Pseudoctenis fissa species	7	Plantae : Cycadophyta : Cycadopsida : Cycadales : Pseudoctenis : *Pseudoctenis fissa*	237 - 228 Ma Late/Upper Triassic
Pseudoctenis santajuanensis species	7	Plantae : Cycadophyta : Cycadopsida : Cycadales : Pseudoctenis : *Pseudoctenis santajuanensis*	237 - 228 Ma Late/Upper Triassic
Linguifolium steinmannii species	7	Plantae : Ginkgophyta : Ginkgoopsida : Linguifolium : *Linguifolium steinmannii*	237 - 228 Ma Late/Upper Triassic
Gontriglossa reinerae species	7	Plantae : Gnetophyta : Gnetopsida : Gontriglossa : *Gontriglossa reinerae*	237 - 228 Ma Late/Upper Triassic
Thaumatopteris rothii species	7	Plantae : Pteridophyta : Pteridopsida : Gleicheniales : Dipteridaceae : Thaumatopteris : *Thaumatopteris rothii*	237 - 228 Ma Late/Upper Triassic
Cladophlebis sp. genus	6	Plantae : Tracheophyta : Polypodiopsida : Osmundales : Osmundaceae : *Cladophlebis*	237 - 228 Ma Late/Upper Triassic
Dictyophyllum fuenzalidai species	7	Plantae : Pteridophyta : Pteridopsida : Dictyophyllum : *Dictyophyllum fuenzalidai*	237 - 228 Ma Late/Upper Triassic
Dictyophyllum tenuifolium species	7	Plantae : Pteridophyta : Pteridopsida : Dictyophyllum : *Dictyophyllum tenuifolium*	237 - 228 Ma Late/Upper Triassic
Gleichenites sp. genus	6	Plantae : Pteridophyta : Pteridopsida : Polypodiales : *Gleichenites*	237 - 228 Ma Late/Upper Triassic
Saportaea dichotoma species	7	Plantae : Pteridophyta : Pteridopsida : Polypodiales : Saportaea : *Saportaea dichotoma*	237 - 228 Ma Late/Upper Triassic

References

Martins-Neto R. G., Gallego O. F., et al (2003) The Triassic insect fauna from South America (Argentina, Brazil and Chile): a checklist (except Blattoptera and Coleoptera) and descriptions of new taxa, Acta Zoologica Cracoviensia 46 Suppl, 229-256

Gallego O. F., Martins-Neto R. G., et al (2005) Conchostracans and insects from the Upper Triassic of the Biobío river ("Santa Juana Formation"), south-central Chile, Revista Geológica de Chile 22, 293-311

Nielsen S. N. (2005) The Triassic Santa Juana Formation at the lower Biobío River, south central Chile, Journal of South American Earth Sciences 19, 547-562 doi:10.1016/j.jsames.2005.06.002

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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