AMNH294, Bed 27, Tinta Section 3 (Permian to of Peru)

Where: Cusco, Peru (14.2° S, 71.3° W: paleocoordinates 29.3° S, 48.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• 250 feet thick, fossiliferous zones at 83, 122, 227, 235, and 245 ft. above base.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, shelly/skeletal, green, yellow limestone

• Limestone, buff, becomes dark gray above, weathers gray, blocky, in even beds up to about 1 foot thick.

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 41345: authorized by David Bottjer, entered by Matthew Clapham on 13.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

 Trochonematoidea - Lophospiridae
Worthenia sp. de Koninck 1883 snail
Echinocrinus sp. Agassiz 1841 sea urchin
Crinoidea indet. Miller 1821 Sea lily
Stems and rare plates
 Productida - Productidae
"Marginifera capaci" = Kozlowskia capaci
"Marginifera capaci" = Kozlowskia capaci d'Orbigny 1842
 Productida - Rugosochonetidae
Lissochonetes assula Chronic 1949
 Athyridida - Neoretziidae
Hustedia sicuaniensis Chronic 1949
 Athyridida - Athyrididae
Composita subtilita Hall 1852
n. ssp. peruviana
 Spiriferida - Ambocoeliidae
 Rhynchonellida - Wellerellidae
Wellerella bidentata Girty 1909
n. ssp. parva