Where: Argentina (24.0° S, 66.0° W: paleocoordinates 42.2° S, 130.0° W)
• local area-level geographic resolution
When: Acoite Formation, Arenig (478.6 - 466.0 Ma)
• They report this as Middle Arenig, probably corresponding with the Whitlandian
• formation-level stratigraphic resolution
Environment/lithology: transition zone or lower shoreface; lithified, concretionary, gray, green, sandy sandstone and shale
Collection methods: JA: marked by Novack-Gottshall without explanation as omitting some genera, some macrofossils, some microfossils, and species names, but apparently complete
Primary reference: T. M. Sanchez and B.G. Waisfeld. 1995. Benthic assemblages in the northwestern of Gondwana: A test of the Ordovician evolutionary radiation model. In J.D. Cooper, M.L. Droser, S.C. Finney (eds.), Ordovician Odyssey: Short papers for the seventh international symposium on the Ordovician system 409-412 [A. Miller/P. Novack-Gottshall/P. Wagner]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 8777: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 29.08.2000
Creative Commons license: CC BY (attribution)
Taxonomic list
Pterobranchia | |
Dichograptus sp. graptolite | |
Phyllograptus sp. Hall 1858 graptolite
Tetragraptus quadribrachiatus Hall 1858 graptolite | |
"Didymograptus deflexus" = Baltograptus deflexus
"Didymograptus deflexus" = Baltograptus deflexus Elles and Wood 1901 graptolite | |
Acrograptus sp. graptolite | |
Rostroconchia | |
Ribeiria sp. Sharpe 1853 | |
Tolmachovia sp. Howell and Kobayashi 1936 | |
Gastropoda | |
Peelerophon sp. Yochelson 1982 snail | |
Bivalvia | |
Natasia sp. Sánchez 1995 clam | |
Ctenodonta sp. Salter 1852 clam | |
Cosmogoniophora sp. McLearn 1918 clam | |
"Cosmogoniophorina sp." = Cosmogoniophorina
"Cosmogoniophorina sp." = Cosmogoniophorina Isberg 1934 clam | |
Rhynchonellata | |
Glyptorthis sp. Foerste 1914 | |
Paralenorthis sp. Havlicek and Branisa 1980 | |
Nanorthis sp. Ulrich and Cooper 1936
Desmorthis sp. Ulrich and Cooper 1936 | |
Incorthis sp. Havlíček and Branisa 1980 | |
Trilobita | |
Carolinites sp. Kobayashi 1940 trilobite | |
Hypermecaspis sp. Harrington and Leanza 1957 trilobite
Psilocara sp. Fortey 1974 trilobite
Bienvillia sp. Clark 1924 trilobite
Porterfieldia sp. Cooper 1953 trilobite | |
Araiopleura sp. Harrington and Leanza 1957 trilobite | |
Rhombampyx sp. Fortey 1975 trilobite
Ampyx sp. Dalman 1827 trilobite | |
Famatinolithus sp. Harrington and Leanza 1957 trilobite | |
Branisaspis sp., Kayseraspis sp., "Megalaspidella sp." = Asaphellus, Australopyge sp., "Araiocaris sp." = Ogygiocaris, Hoekaspis sp., "Megalaspis sp." = Megistaspis, Ogyginus sp., Thysanopyge sp., Niobides sp., Zuninaspis sp., Merlinia sp.
Branisaspis sp. Pribyl and Vanek 1980 trilobite
Kayseraspis sp. Harrington 1938 trilobite
"Megalaspidella sp." = Asaphellus Callaway 1877 trilobite
Australopyge sp. Harrington and Leanza 1957 trilobite
"Araiocaris sp." = Ogygiocaris Angelin 1854 trilobite
Hoekaspis sp. Kobayashi 1937 trilobite
"Megalaspis sp." = Megistaspis Jaanusson 1956 trilobite
Ogyginus sp. Raymond 1912 trilobite
Thysanopyge sp. Kayser 1898 trilobite
Niobides sp. Harrington and Leanza 1957 trilobite
Zuninaspis sp. Harrington and Leanza 1957 trilobite
Merlinia sp. Fortey and Owens 1987 trilobite | |
Illaenopsis sp. Salter 1865 trilobite
Symphysurus sp. Goldfuss 1843 trilobite | |
Colpocoryphe sp. Novak and Perner 1918 trilobite | |
Neseuretus sp. Hicks 1873 trilobite | |
Pliomeridius sp. Leanza and Baldis 1975 trilobite |