AMNH298, Bed 50, Pasaje-Picchu Section 8 (Permian to of Peru)

Where: Apurimac, Peru (13.6° S, 73.1° W: paleocoordinates 27.7° S, 50.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Copacabana Group, Asselian to Asselian (298.9 - 290.1 Ma)

• 55 feet thick.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, shelly/skeletal, gray limestone

• Limestone, pink to light gray, massive, weathers very rough, sparsely fossiliferous.

Size class: macrofossils

Preservation: replaced with silica

Collection methods: bulk, chemical,

Primary reference: N. D. Newell, J. Chronic, and T.G. Roberts. 1953. Upper Paleozoic of Peru. Geological Society of America Memoir 58:1-276 [D. Bottjer/M. Clapham/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 41360: authorized by David Bottjer, entered by Matthew Clapham on 13.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Cyrtoneritimorpha - Orthonychiidae
Orthonychia parva Shumard and Swallow 1858 snail
Stenolaemata
 Fenestrida - Fenestellidae
"Fenestrellina picchuensis" = Alternifenestella picchuensis
"Fenestrellina picchuensis" = Alternifenestella picchuensis Chronic 1949
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
Stems and rare plates
Rhynchonellata
 Athyridida - Neoretziidae
Hustedia meridionalis n. sp. Chronic 1949
 Athyridida - Athyrididae
Composita subtilita Hall 1852
n. ssp. peruviana
 Spiriferinida - Reticulariinidae
Reticulariina constricta n. sp. Chronic 1949
 Spiriferinida - Punctospiriferidae
 Spiriferida - Trigonotretidae
"Neospirifer condor" = Gypospirifer condor
"Neospirifer condor" = Gypospirifer condor d'Orbigny 1842
 Rhynchonellida - Wellerellidae
Wellerella osagensis Shumard and Swallow 1858
ssp. peruviana