Cerro La Chilca Section Palaeoglossa–Chilcorthis Association (Ordovician of Argentina)

Where: San Juan, Argentina (30.6° S, 68.9° W: paleocoordinates 34.9° S, 132.5° W)

When: Yangtzeplacognathus crassus conodont zone, Lower Member (Los Azules Formation), Darriwilian (467.3 - 458.4 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: deep-water; bioturbated, gray shale and marl

• rhythmic package of dark shales and marlstones

Size class: macrofossils

Preservation: mold/impression

Primary reference: J. L. Benedetto. 2015. A Middle Ordovician (Darriwilian) dysaerobic brachiopod assemblage from the Precordillera terrane of Argentina: implications for early colonization of deep waters. Ameghiniana 52(1):69-106 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 195044: authorized by Pete Wagner, entered by Pete Wagner on 13.07.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Lingulata
 Lingulida - Obolidae
Palaeoglossa minima n. sp., ? Anomaloglossa sp.
Palaeoglossa minima n. sp. Benedetto 2015
 Acrotretida - Acrotretidae
? Cyrtonotreta sp., Cyrtonotreta vasculata n. sp.
? Cyrtonotreta sp. Holmer 1989
Cyrtonotreta vasculata n. sp. Benedetto 2015
Craniata
 Craniida - Craniidae
Philhedra pauciradiata n. sp.
Philhedra pauciradiata n. sp. Benedetto 2015
Strophomenata
 Strophomenida - Taffiidae
Bockelia canalis n. sp.
Bockelia canalis n. sp. Benedetto 2015
 Strophomenida - Aegiromenidae
Aegiromenidae indet.
Aegiromenidae indet. Havlicek 1961
Rhynchonellata
 Pentamerida - Syntrophiidae
? Syntrophia sp.
 Orthida - Orthidae
Sivorthis precordillerana n. sp.
Sivorthis precordillerana n. sp. Benedetto 2015
 Orthida - Chilcorthidae
Chilcorthis huarpe n. gen. n. sp.
Chilcorthis huarpe n. gen. n. sp. Benedetto 2015
 Orthida - Finkelnburgiidae
? Finkelnburgiidae indet.
? Finkelnburgiidae indet. Schuchert and Cooper 1931
Trilobita
 Trinucleida - Raphiophoridae
Mendolaspis salagastensis
Mendolaspis salagastensis Rusconi 1951 trilobite
 Ptychopariida - Shumardiidae
Kweichowilla sp.
Kweichowilla sp. Zhang 1964 trilobite
 Asaphida - Nileidae
Nileus depressus
Nileus depressus Boeck 1838 trilobite
Nileus depressus argentinensis
 Phacopida - Cheiruridae
Macrogrammus pengi
Macrogrammus pengi Edgecombe et al. 1999 trilobite
 Olenida - Olenidae
Porterfieldia sp.
Porterfieldia sp. Cooper 1953 trilobite
 Proetida - Telephinidae
Carolinites latus, Carolinites aff. pardensis
Artiopoda
 Agnostida - Metagnostidae
"Geragnostus sp." = Geragnostus, "Neptunagnostella superba" = Geragnostus
"Geragnostus sp." = Geragnostus Howell 1935
"Neptunagnostella superba" = Geragnostus