Pongo de Manseriche [Chonta Fm] (Cretaceous of Peru)

Where: Peru (4.5° S, 77.6° W: paleocoordinates 10.0° S, 49.6° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Chonta Formation, Albian (113.0 - 100.5 Ma)

• LITHOSTRATIGRAPHY: From the Chonta Fm, which overlies the Oriente Fm, and is overlain by the Vivian Fm. AGE: Albian, on the basis of ammonite biostratigraphy. STRATIGRAPHIC POSITION: From unknown position within formation.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; black shale and siltstone

• LITHOLOGY: Shales and siltstones. LITHIFICATION: No basis to determine lithification.

Size class: macrofossils

Collection methods: surface (in situ),

• COLLECTOR: Probably Knetchtel and others. REPOSITORY: Unknown.

Primary reference: B. Kummel. 1948. Geological reconnaissance of the Contamana region, Peru. Geological Society America Bulletin 59:1217-1265 [A. Hendy/A. Hendy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 88673: authorized by Austin Hendy, entered by Austin Hendy on 17.04.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Comprehensive for ammonoids, bivalves, and other invertebrates groups; much diversity not reported, however. NOMENCLATURE: Not an authoritative publication, with somewhat antiquated nomenclature, but with species-resolution identifications.
Bivalvia
 Arcida - Arcidae
 Myalinida - Inoceramidae
"Inoceramus concentricus" = Inoceramus (Actinoceramus) concentricus
"Inoceramus concentricus" = Inoceramus (Actinoceramus) concentricus Parkinson 1819 clam
 Pectinida - Plicatulidae
 Ostreida - Gryphaeidae
"Exogyra aff. africana" = Ilymatogyra (Afrogyra) africana
"Exogyra aff. africana" = Ilymatogyra (Afrogyra) africana Lamarck 1801 oyster
 Cardiida - Veneridae
Paphia peruana venus clam
 Cardiida - Cardiidae
 Poromyida - Poromyidae
 Pholadomyida - Pholadomyidae
 Nuculida - Nuculidae
Gastropoda
 Ptenoglossa - Epitoniidae
Cephalopoda
 Ammonitida - Knemiceratidae
"Knemiceras crassinodosum" = Glottoceras crassinodosum, "Knemiceras moorei" = Glottoceras moorei, "Knemiceras attenuatum" = Glottoceras attenuatum, "Knemiceras semicostatum" = Glottoceras semicostatum, "Knemiceras crassicostatum" = Glottoceras crassicostatum, Knemiceras raimondi
"Knemiceras crassinodosum" = Glottoceras crassinodosum Sommermeier 1910 ammonite
"Knemiceras moorei" = Glottoceras moorei Knechtel 1947 ammonite
"Knemiceras attenuatum" = Glottoceras attenuatum Hyatt 1875 ammonite
"Knemiceras semicostatum" = Glottoceras semicostatum Sommermeier 1910 ammonite
"Knemiceras crassicostatum" = Glottoceras crassicostatum Sommermeier 1910 ammonite
 Ammonitida - Brancoceratidae
Brancoceras sp. Steinmann 1881 ammonite
 Ammonitida - Prolyelliceratidae
"Lyelliceras ulrichi" = Prolyelliceras ulrichi, "Lyelliceras mathewsi" = Prolyelliceras mathewsi
"Lyelliceras ulrichi" = Prolyelliceras ulrichi Knechtel 1947 ammonite
"Lyelliceras mathewsi" = Prolyelliceras mathewsi Knechtel 1947 ammonite
 Ammonitida - Mojsisovicsiidae
"Oxitropidoceras douglasi" = Oxytropidoceras, "Oxitropidoceras (Manuaniceras) bosei" = Oxytropidoceras, "Oxitropidoceras (Manuaniceras) carbonarium" = Oxytropidoceras, "Oxitropidoceras (Manuaniceras) hubbardi" = Oxytropidoceras
"Oxitropidoceras douglasi" = Oxytropidoceras ammonite
"Oxitropidoceras (Manuaniceras) bosei" = Oxytropidoceras ammonite
"Oxitropidoceras (Manuaniceras) carbonarium" = Oxytropidoceras ammonite
"Oxitropidoceras (Manuaniceras) hubbardi" = Oxytropidoceras ammonite