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
Rhynchonellata
 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
 Rhynchonellida - Tetrarhynchiidae
Gibbirhynchia dereki
Polychaeta
 Serpulimorpha -
? Tetraserpula sp.
? Tetraserpula sp. Parsch 1956
Bivalvia
 Mytilida - Mytilidae
Modiolus cf. thiollierei, Lycettia sp.
Lycettia sp. Cox 1937 mussel
 Arcida - Parallelodontidae
Grammatodon sp., Cosmetodon sp.
Grammatodon sp. Meek and Hayden 1860 clam
Cosmetodon sp. Branson 1942 clam
 Ostreida - Gryphaeidae
Gryphaea darwini, Gryphaea aff. cymbium, Liostrea aff. hisingeri
Gryphaea aff. cymbium Lamarck 1819 oyster
 Ostreida - Pinnidae
Pinna cf. folium
Pinna cf. folium Young and Bird 1822 oyster
 Pectinida - Entolioididae
Kolymonectes sp.
Kolymonectes sp. Bychkov et al. 1976 scallop
 Pectinida - Pectinoidae
Camptonectes subulatus, Praechlamys cf. valoniensis, Chlamys textoria
Camptonectes subulatus Goldfuss 1834 scallop
Praechlamys cf. valoniensis Defrance 1825 scallop
Chlamys textoria Schlotheim 1820 scallop
 Pectinida - Neitheoidae
Weyla alata, Lywea unca
Weyla alata von Buch 1838 scallop
Lywea unca Philippi 1899 scallop
 Pectinida - Limidae
? Plagiostoma sp., Ctenostreon sp., Antiquilima sp., Antiquilima succincta, Pseudolimea sp.
? Plagiostoma sp. Sowerby 1814 file clam
Ctenostreon sp. Eichwald 1862 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 - Entoliidae
Entolium sp., Entolium cf. lunare
Entolium sp. Meek 1865 scallop
Entolium cf. lunare Roemer 1839 scallop
 Carditida - Cardiniidae
Cardinia cf. listeri
Cardinia cf. listeri Sowerby 1817 clam
 Carditida - Astartidae
Astartidae indet.
Astartidae indet. d'Orbigny 1844 clam
 Lucinida -
Lucinoidea indet.
Lucinoidea indet. Fleming 1828 clam
 Pholadida - Pleuromyidae
Pleuromya sp.
Pleuromya sp. Meek 1873 clam
 Pholadida - Ceratomyidae
? Gresslya sp.
? Gresslya sp. Agassiz 1843 clam
 Cardiida - Cardiidae
? Protocardia sp.
? Protocardia sp. Beyrich 1845 cockle
 Pholadomyida - Pholadomyidae
Pholadomya sp., Goniomya sp.
Pholadomya sp. Sowerby 1823 clam
Goniomya sp. Agassiz 1842 clam
 Trigoniida - Groeberellidae
Groeberella neuquensis
Groeberella neuquensis Groeber 1924 clam
 Trigoniida - Myophorelloidae
Frenguelliella cf. poultoni, ? Jaworskiella sp.
? Jaworskiella sp. Leanza 1942 clam
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
 Seguenzioidea - Eucyclidae
Amberleya cf. americana
 Trochoidea - Trochidae
Lithotrochus humboldtii
Lithotrochus humboldtii von Buch 1839 top snail