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Lajas, Neuquén Province, Argentina

Formation	Lajas
Age:	165 - 161 Ma Jurassic
Interval	Early Bajocian
Lithology	sandstone
Number of Collections	5
Number of Occurrences	36

Recorded Sample Locations

Location	Region	Stratigraphic Name
Chacaicó 2	Catán Lil Department, Neuquén Province, Argentina	Lajas
Chacaicó	Catán Lil Department, Neuquén Province, Argentina	Lajas
Barda Negra sud	Zapala Department, Neuquén Province, Argentina	Lajas
Los Pozones	Puente Picún Leufú, Zapala Department, Neuquén Province, Argentina	Lajas
Chacaico Sur	Catán Lil Department, Neuquén Province, Argentina	Lajas

Associated Units

Stratigraphic Name	Age	Lithology	Occurrence Records
Cuyo - Los Molles	172 - 168 Ma Middle Jurassic	shale/marl, mudstone	8

Recorded Fossils

Accepted Name	Type	Hierarchy	Age
Serpulidae family	5	Animalia : Annelida : Polychaeta : Sabellida : Serpulidae	171.6 - 168.4 Ma Middle Jurassic
Bryozoa phylum	2	Animalia : Bryozoa	171.6 - 168.4 Ma Middle Jurassic
Cryptoclidus sp. genus	6	Animalia : Chordata : Reptilia : Sauropterygia : Cryptoclididae : *Cryptoclidus*	164.7 - 161.2 Ma Jurassic
Muraenosaurus sp. genus	6	Animalia : Chordata : Reptilia : Elasmosauridae : *Muraenosaurus*	164.7 - 161.2 Ma Jurassic
Pliosauridae family	5	Animalia : Chordata : Reptilia : Pliosauridae	164.7 - 161.2 Ma Jurassic
Araucanastrea majuscula species	7	Animalia : Cnidaria : Anthozoa : Scleractinia : Actinastreidae : Araucanastrea : *Araucanastrea majuscula*	171.6 - 168.4 Ma Middle Jurassic
Araucanastrea minuscula species	7	Animalia : Cnidaria : Anthozoa : Scleractinia : Actinastreidae : Araucanastrea : *Araucanastrea minuscula*	171.6 - 168.4 Ma Middle Jurassic
Stephanastrea ramulifera species	7	Animalia : Cnidaria : Anthozoa : Scleractinia : Actinastreidae : Stephanastrea : *Stephanastrea ramulifera*	171.6 - 168.4 Ma Middle Jurassic
Eocolumastrea gortanii species	7	Animalia : Cnidaria : Anthozoa : Scleractinia : Columastreidae : Eocolumastrea : *Eocolumastrea gortanii*	171.6 - 168.4 Ma Middle Jurassic
Garateastrea bardanegrensis species	7	Animalia : Cnidaria : Anthozoa : Scleractinia : Guembelastraeidae : Garateastrea : *Garateastrea bardanegrensis*	171.6 - 168.4 Ma Middle Jurassic
Astraraea fungiformis species	7	Animalia : Cnidaria : Anthozoa : Scleractinia : Haplaraeidae : Astraraea : *Astraraea fungiformis*	171.6 - 168.4 Ma Middle Jurassic
Kobyastraea louisae species	7	Animalia : Cnidaria : Anthozoa : Scleractinia : Kobyastraeidae : Kobyastraea : *Kobyastraea louisae*	171.6 - 168.4 Ma Middle Jurassic
Complexastraeopsis sp. genus	6	Animalia : Cnidaria : Anthozoa : Scleractinia : Montlivaltiidae : *Complexastraeopsis*	171.6 - 168.4 Ma Middle Jurassic
Cyathophylliopsis delabechei species	7	Animalia : Cnidaria : Anthozoa : Scleractinia : Montlivaltiidae : Cyathophylliopsis : *Cyathophylliopsis delabechei*	171.6 - 168.4 Ma Middle Jurassic
Mapucheastrea andina species	7	Animalia : Cnidaria : Anthozoa : Scleractinia : Montlivaltiidae : Mapucheastrea : *Mapucheastrea andina*	171.6 - 168.4 Ma Middle Jurassic
Montlivaltia kobyi species	7	Animalia : Cnidaria : Anthozoa : Scleractinia : Montlivaltiidae : Montlivaltia : *Montlivaltia kobyi*	171.6 - 168.4 Ma Middle Jurassic
Neuquinosmilia gerthi species	7	Animalia : Cnidaria : Anthozoa : Scleractinia : Montlivaltiidae : Neuquinosmilia : *Neuquinosmilia gerthi*	171.6 - 168.4 Ma Middle Jurassic
Neuquinosmilia lospozonensis species	7	Animalia : Cnidaria : Anthozoa : Scleractinia : Montlivaltiidae : Neuquinosmilia : *Neuquinosmilia lospozonensis*	171.6 - 168.4 Ma Middle Jurassic
Convexastrea weaveri species	7	Animalia : Cnidaria : Anthozoa : Scleractinia : Stylinidae : Convexastrea : *Convexastrea weaveri*	171.6 - 168.4 Ma Middle Jurassic
Crinoidea class	3	Animalia : Echinodermata : Crinoidea	171.6 - 168.4 Ma Middle Jurassic
Echinoidea class	3	Animalia : Echinodermata : Protocidaris : Echinoidea	171.6 - 168.4 Ma Middle Jurassic
Bivalvia class	3	Animalia : Mollusca : Bivalvia	171.6 - 168.4 Ma Middle Jurassic
Emileia sp. genus	6	Animalia : Mollusca : Cephalopoda : Ammonoidea : Stephanoceratidae : *Emileia*	171.6 - 168.4 Ma Middle Jurassic
Pseudotoites sp. genus	6	Animalia : Mollusca : Cephalopoda : Ammonoidea : Otoitidae : *Pseudotoites*	171.6 - 168.4 Ma Middle Jurassic
Sonninia sp. genus	6	Animalia : Mollusca : Cephalopoda : Ammonoidea : Sonniniidae : *Sonninia*	171.6 - 168.4 Ma Middle Jurassic
Gastropoda class	3	Animalia : Mollusca : Gastropoda	171.6 - 168.4 Ma Middle Jurassic

References

Gasparini Z., Spaletti L. (1993) First Callovian plesiosaurs from the Neuquen Basin, Argentina, Ameghiniana 30 3, 245-254

Morsch S. M. (1996) Les Scléractiniaires jurassiques (Bajocien) d'Argentine (Bassin de Neuquén). Systématique, Géobios 29 6, 671-706

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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