Arenig San Juan Formation, Gualcamayo, Huaco, Los Gatos, Portrerillo, Portezuelo (Ordovician of Argentina)

Where: Argentina (30.0° S, 69.0° W: paleocoordinates 36.9° S, 130.2° W)

• local area-level geographic resolution

When: San Juan Formation, Arenig (478.6 - 466.0 Ma)

• Arenig (undifferentiated) section of formation

• formation-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified, gray, green, yellow, argillaceous limestone and shale

• light, yellow-gray thin-bedded limestone, occasionally marly, with intercalations of yellow green shale

Collection methods: Conodont and trilobite taxonomy and biostratigraphy

Primary reference: N. E. Vaccari, B.G. Waisfeld, and M. Carrera. 1986. Nuevos trilobites de la Formacion San Juan (Ordovicico temprano), Precordillera de San Juan y La Rioja, Argentina. Actas del IV congreso Argentino de paleontologia y bioestratigrafia - Simposio: Bioestratigrafia del Paleozoico Inferior. Ed. A. Cuerda 1:89-97 [A. Miller/P. Novack-Gottshall]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 8719: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 28.08.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

• Conodont and trilobite taxonomy and biostratigraphy
Show authors, comments, and common names
unclassified
  -
Cyrtonoidus sp., Falodus sp.
Rhynchonellata
 Orthida - Orthidae
Orthis sp.
Orthis sp. Dalman 1828
Strophomenata
 Strophomenida - Taffiidae
Taffia sp.
Taffia sp. Butts 1926
Stenolaemata
 Trepostomida - Monticuliporidae
Monticulipora sp.
Monticulipora sp. d'Orbigny 1850
Gastropoda
 Euomphalina - Macluritidae
Maclurites sp.
Maclurites sp. Le Sueur 1818 snail
Trilobita
 Olenida - Olenidae
Porterfieldia sp.
Porterfieldia sp. Cooper 1953 trilobite
 Phacopida - Encrinuridae
Encrinurus sp.
Encrinurus sp. Emmrich 1844 trilobite
 Phacopida - Pliomeridae
? Pliomerops sp., Pliomera sp., Benedettia sp.
? Pliomerops sp. Raymond 1905 trilobite
Pliomera sp. Angelin 1845 trilobite
Benedettia sp. Toro and Mondali 1981 trilobite
 Phacopida - Cheiruridae
Cyrtometopus sp., Holia sp.
Cyrtometopus sp. Angelin 1854 trilobite
Holia sp. Bradley 1930 trilobite
 Proetida - Hystricuridae
? Hillyardina sp.
? Hillyardina sp. Ross 1951 trilobite
 Corynexochida - Illaenidae
Nanillaenus sp.
Nanillaenus sp. Jaanusson 1954 trilobite
 Corynexochida - Leiostegiidae
Annamitella sp.
Annamitella sp. Mansuy 1920 trilobite
 Harpetida - Harpetidae
"Selenoharpes sp." = Scotoharpes
"Selenoharpes sp." = Scotoharpes Lamont 1948 trilobite
 Trinucleida - Raphiophoridae
Ampyx sp., Mendolaspis sp.
Ampyx sp. Dalman 1827 trilobite
Mendolaspis sp. Rusconi 1951 trilobite
 Asaphida - Nileidae
"Remopleuridioides sp." = Nileus
"Remopleuridioides sp." = Nileus Dalman 1827 trilobite
 Asaphida - Asaphidae
"Parabasilicus sp." = Basilicus
"Parabasilicus sp." = Basilicus Salter 1849 trilobite
Conodonta
 Prioniodontida - Oistodontidae
Oistodus sp.
Oistodus sp. Pander 1856 conodont
 Prioniodontida -
"Ptiloconus sp." = Erismodus
"Ptiloconus sp." = Erismodus conodont
 Proconodontida - Cordylodontidae
Cordylodus sp.
Cordylodus sp. Pander 1856 conodont
  -
Scandodus sp.
Scandodus sp. Lindstrom 1955 conodont
 Ozarkodinida -
Periodon sp., Plectodina sp.
Periodon sp. Hadding 1913 conodont
Plectodina sp. conodont