Acoite Fm., Los Colorados and Quebrada Chamarra, Argentina (Ordovician of Argentina)

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

• green-gray fine-grained shaley sandstone intercalated with dark gray and yellowish gray shale and sandy shale and sandy limolites and occasional cone-in-cone concretions

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

• Paleoecology and rostroconch and bivalve taxonomy
Show authors, comments, and common names
Pterobranchia
 Graptoloidea - Didymograptidae
"Didymograptus deflexus" = Baltograptus deflexus
"Didymograptus deflexus" = Baltograptus deflexus Elles and Wood 1901 graptolite
 Graptoloidea - Sinograptidae
Acrograptus sp.
Acrograptus sp. graptolite
 Graptoloidea - Dichograptidae
Dichograptus sp.
Dichograptus sp. graptolite
 Graptoloidea - Phyllograptidae
Tetragraptus quadribrachiatus, Phyllograptus sp.
Tetragraptus quadribrachiatus Hall 1858 graptolite
Phyllograptus sp. Hall 1858 graptolite
Gastropoda
 Bellerophontida - Tropidodiscidae
Peelerophon sp.
Peelerophon sp. Yochelson 1982 snail
Bivalvia
 Solemyida - Ctenodontidae
Ctenodonta sp.
Ctenodonta sp. Salter 1852 clam
 Afghanodesmatida - Tironuculidae
Natasia sp.
Natasia sp. Sánchez 1995 clam
 Heteroconchia - Lipanellidae
"Cosmogoniophorina sp." = Cosmogoniophorina
"Cosmogoniophorina sp." = Cosmogoniophorina Isberg 1934 clam
 Modiomorphida - Modiomorphidae
Cosmogoniophora sp.
Cosmogoniophora sp. McLearn 1918 clam
Rostroconchia
 Ribeirioida - Ischyriniidae
Tolmachovia sp.
Tolmachovia sp. Howell and Kobayashi 1936
 Ribeirioida - Technophoridae
Ribeiria sp.
Ribeiria sp. Sharpe 1853
Rhynchonellata
 Orthida - Glyptorthidae
Glyptorthis sp.
Glyptorthis sp. Foerste 1914
 Orthida - Hesperonomiidae
Hesperonomiella sp.
 Orthida - Orthidae
Paralenorthis sp.
Paralenorthis sp. Havlicek and Branisa 1980
 Orthida - Plectorthidae
Nanorthis sp., Desmorthis sp.
Nanorthis sp. Ulrich and Cooper 1936
Desmorthis sp. Ulrich and Cooper 1936
 Orthida - Heterorthidae
Incorthis sp.
Incorthis sp. Havlíček and Branisa 1980
Trilobita
 Asaphida - Asaphidae
Niobides sp., Branisaspis sp., Thysanopyge sp., Hoekaspis sp., "Megalaspis sp." = Megistaspis, Australopyge sp., Zuninaspis sp., "Megalaspidella sp." = Asaphellus, "Araiocaris sp." = Ogygiocaris, Kayseraspis sp., Merlinia sp., Ogyginus sp.
Niobides sp. Harrington and Leanza 1957 trilobite
Branisaspis sp. Pribyl and Vanek 1980 trilobite
Thysanopyge sp. Kayser 1898 trilobite
Hoekaspis sp. Kobayashi 1937 trilobite
"Megalaspis sp." = Megistaspis Jaanusson 1956 trilobite
Australopyge sp. Harrington and Leanza 1957 trilobite
Zuninaspis sp. Harrington and Leanza 1957 trilobite
"Megalaspidella sp." = Asaphellus Callaway 1877 trilobite
"Araiocaris sp." = Ogygiocaris Angelin 1854 trilobite
Kayseraspis sp. Harrington 1938 trilobite
Merlinia sp. Fortey and Owens 1987 trilobite
Ogyginus sp. Raymond 1912 trilobite
 Asaphida - Nileidae
Illaenopsis sp., Symphysurus sp.
Illaenopsis sp. Salter 1865 trilobite
Symphysurus sp. Goldfuss 1843 trilobite
 Trinucleida - Raphiophoridae
Ampyx sp., Rhombampyx sp.
Ampyx sp. Dalman 1827 trilobite
Rhombampyx sp. Fortey 1975 trilobite
 Trinucleida - Trinucleidae
Famatinolithus sp.
Famatinolithus sp. Harrington and Leanza 1957 trilobite
 Trinucleida - Alsataspididae
Araiopleura sp.
Araiopleura sp. Harrington and Leanza 1957 trilobite
 Proetida - Telephinidae
Carolinites sp.
Carolinites sp. Kobayashi 1940 trilobite
 Phacopida - Pliomeridae
Pliomeridius sp.
Pliomeridius sp. Leanza and Baldis 1975 trilobite
 Phacopida - Calymenidae
Neseuretus sp.
Neseuretus sp. Hicks 1873 trilobite
 Phacopida - Homalonotidae
Colpocoryphe sp.
Colpocoryphe sp. Novak and Perner 1918 trilobite
 Olenida - Olenidae
Hypermecaspis sp., Bienvillia sp., Porterfieldia sp., Psilocara sp.
Hypermecaspis sp. Harrington and Leanza 1957 trilobite
Bienvillia sp. Clark 1924 trilobite
Porterfieldia sp. Cooper 1953 trilobite
Psilocara sp. Fortey 1974 trilobite