Where: Argentina (50.2° S, 72.9° W: paleocoordinates 52.1° S, 63.9° W)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Early/Lower Oligocene (33.9 - 28.4 Ma)
• STRATIGRAPHIC RELATIONS: Lithostratigraphy not stated. AGE: Paleontological evidence suggests an Eocene to Early Oligocene age for this fauna. Strong faunal similarity to San Julian (Eocene-Oligocene), Monte Leon (Oligocene) and Loreto Formations (Oligocene-Miocene). Several taxa also recorded in the Millongue and Boqueron Formations of Chile. An Oligocene age is assigned here on the basis of commonality in age between correlated formations. STRATIGRAPHIC POSITION: Composite collection from unit within local area.
• formation-level stratigraphic resolution
Environment/lithology: offshore; poorly lithified, shelly/skeletal, conglomeratic sandstone
Size class: macrofossils
Preservation: original aragonite, original calcite
Collection methods: quarrying,
• COLLECTOR: M. Doello-Jurado, N. Malumian and H. H. Camacho, possibly R. Gorrono, plus existing collections in the Museo Argentino de Ciencias Naturales and Servico Geologico Nacional. REPOSITORY: Museo Argentino de Ciencias Naturales and Servico Geologico Nacional.
Primary reference: N. Malumian, H. H. Camacho, and R. Gorrono. 1978. Molluscos del Terciario Inferior ("Magallanense") de la Isla Grande de Tierra del Fuego (Republica Argentina). Ameghiniana 15(3-4):265-284 [A. Hendy/A. Hendy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 66146: authorized by Austin Hendy, entered by Austin Hendy on 02.10.2006
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Anthozoa | |
| |
Gastropoda | |
Calyptraea sp. Lamarck 1799 slipper shell
Calyptraea cf. merriami slipper shell | |
| |
Struthiolarella densestriata Ihering 1897 snail | |
"Nassa" fueguina Steinmann and Wilckens 1908 true whelk
"Verconella" iheringi true whelk
Austrocominella fueguensis Ihering 1907 true whelk | |
Trophon sp. Montfort 1810 murex snail | |
Miomelon becki, "Miomelon cf. gracilior" = Miomelon gracilis
"Miomelon cf. gracilior" = Miomelon gracilis Philippi 1887 volute | |
""Actaeon" chilensis" = Acteon
""Actaeon" chilensis" = Acteon snail | |
Bivalvia | |
Cucullaea (Cucullona) alta Sowerby 1846 clam | |
Modiolus ameghinoi Ihering 1907 mussel | |
"Miltha promaucana" = Lucinoma promaucana
| |
Eurhomalea cf. fuenzalidai Philippi 1887 venus clam | |
Cardiocardita inaequalis Philippi 1887 clam
Pleuromeris elegantoides Ortman 1902 clam | |
Nucula (Leionucula) grandis n. sp.
Nucula (Leionucula) grandis n. sp. Malumian et al. 1978 nut clam |