Las Chilcas, Neuquén Basin (Tres Esquinas Fm.) (Jurassic of Argentina)

Also known as Arroyo Las Chilcas

Where: Mendoza, Argentina (34.9° S, 69.8° W: paleocoordinates 37.0° S, 29.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Fanninoceras - Tenuicostatum ammonoid zone, Tres Esquinas Formation, Late/Upper Sinemurian (196.5 - 189.6 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; sandstone

Size class: macrofossils

Collection methods: MLP - Invertebrate Palaeontology Department at Museo de Ciencias Naturales La Plata, Argentina

Primary reference: S. E. Damborenea and S. Lanés. 2007. Early Jurassic shell beds from marginal marine environments in southern Mendoza, Argentina. Palaeogeography, Palaeoclimatology, Palaeoecology 250:68-88 [A. Dunhill/B. Allen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 201509: authorized by Alex Dunhill, entered by Bethany Allen on 12.05.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

• Total number of specimens: 374
Show authors, comments, and common names
Anthozoa
 Scleractinia - Stylophyllidae
? Stylophyllopsis sp.
? Stylophyllopsis sp. Frech 1890 stony coral
Polychaeta
 Serpulimorpha -
? Tetraserpula sp.
? Tetraserpula sp. Parsch 1956
Rhynchonellata
 Rhynchonellida - Tetrarhynchiidae
Gibbirhynchia dereki
 Terebratulida -
Peristerothyris reijensteini
 Terebratulida - Lobothyrididae
cf. Lobothyris sp.
cf. Lobothyris sp. Buckman 1917
 Terebratulida - Zeilleriidae
Zeilleria perforata
Zeilleria perforata Piette 1856
 Spiriferinida - Pennospiriferinidae
"Spiriferina cf. ongleyi" = Callospiriferina ongleyi
"Spiriferina cf. ongleyi" = Callospiriferina ongleyi Marwick 1953
Cephalopoda
 Ammonitida -
Ammonitina indet.
Ammonitina indet. Hyatt 1889 ammonite
 Ammonitida - Asteroceratidae
Epophioceras cf. cognitum
Epophioceras cf. cognitum Guerin-Franiatte 1966 ammonite
Gastropoda
  -
Gastropoda indet.
Gastropoda indet. Cuvier 1795 snail
 Trochoidea - Trochidae
Lithotrochus humboldtii
Lithotrochus humboldtii von Buch 1839 top snail
 Seguenzioidea - Eucyclidae
Amberleya cf. americana
Bivalvia
 Mytilida - Mytilidae
Lycettia sp., Modiolus cf. thiollierei
Lycettia sp. Cox 1937 mussel
 Ostreida - Pinnidae
Pinna cf. folium
Pinna cf. folium Young and Bird 1822 oyster
 Ostreida - Gryphaeidae
Liostrea aff. hisingeri, Gryphaea darwini, Gryphaea aff. cymbium
Gryphaea aff. cymbium Lamarck 1819 oyster
 Pectinida - Entoliidae
Entolium sp., Entolium cf. lunare
Entolium sp. Meek 1865 scallop
Entolium cf. lunare Roemer 1839 scallop
 Pectinida - Limidae
Ctenostreon sp., ? Plagiostoma sp., Antiquilima sp., Antiquilima succincta, Pseudolimea sp.
Ctenostreon sp. Eichwald 1862 file clam
? Plagiostoma sp. Sowerby 1814 file clam
Antiquilima sp. Cox 1943 file clam
Antiquilima succincta von Schlotheim 1813 file clam
Pseudolimea sp. Douglas and Arkell 1932 file clam
 Pectinida - Hunanopectinidae
Asoella asapha
Asoella asapha Leanza 1942 scallop
 Pectinida - Neitheoidae
Weyla alata, Lywea unca
Weyla alata von Buch 1838 scallop
Lywea unca Philippi 1899 scallop
 Pectinida - Entolioididae
Kolymonectes sp.
Kolymonectes sp. Bychkov et al. 1976 scallop
 Pectinida - Pectinoidae
Praechlamys cf. valoniensis, Camptonectes subulatus, Chlamys textoria
Praechlamys cf. valoniensis Defrance 1825 scallop
Camptonectes subulatus Goldfuss 1834 scallop
Chlamys textoria Schlotheim 1820 scallop
 Arcida - Parallelodontidae
Grammatodon sp., Cosmetodon sp.
Grammatodon sp. Meek and Hayden 1860 clam
Cosmetodon sp. Branson 1942 clam
 Trigoniida - Myophorelloidae
? Jaworskiella sp., Frenguelliella cf. poultoni
? Jaworskiella sp. Leanza 1942 clam
Frenguelliella cf. poultoni Leanza 1993 clam
 Trigoniida - Groeberellidae
Groeberella neuquensis
Groeberella neuquensis Groeber 1924 clam
 Carditida - Astartidae
Astartidae indet.
Astartidae indet. d'Orbigny 1844 clam
 Carditida - Cardiniidae
Cardinia cf. listeri
Cardinia cf. listeri Sowerby 1817 clam
 Lucinida -
Lucinoidea indet.
Lucinoidea indet. Fleming 1828 clam
 Pholadomyida - Pholadomyidae
Pholadomya sp., Goniomya sp.
Pholadomya sp. Sowerby 1823 clam
Goniomya sp. Agassiz 1842 clam
 Cardiida - Cardiidae
? Protocardia sp.
? Protocardia sp. Beyrich 1845 cockle
 Pholadida - Pleuromyidae
Pleuromya sp.
Pleuromya sp. Meek 1873 clam
 Pholadida - Ceratomyidae
? Gresslya sp.
? Gresslya sp. Agassiz 1843 clam