Also known as Estratos de Quebrada Municipalidad, Marine reptile site
Where: Santiago, Chile (33.4° S, 71.7° W: paleocoordinates 35.4° S, 59.0° W)
• coordinate stated in text
When: Estratos de Quebrada Municipalidad Formation, Early/Lower Maastrichtian (70.6 - 66.0 Ma)
• The EQM is considered to be Maastrichtian in age based on bivalves such as C. acuticostatum and P. hanetiana (Pérez-D’Angelo and Reyes, 1978). Recently this determination has been constrained by a radiometric date on 90Sr/89Sr obtained from bivalve shells (Suárez and Marquardt, 2003) that indicated an age of 69 +- 01 Ma (early Maastrichtian).
Environment/lithology: marine; fine-grained sandstone and conglomerate
Size class: macrofossils
Collected in 2006
Primary reference: R. A. Otero, J. F. Parham, S. Soto-Acuña, P. Jimenez-Huidobro, and D. Rubilar-Rogers. 2012. Marine reptiles from Late Cretaceous (early Maastrichtian) deposits in Algarrobo, central Chile. Cretaceous Research 35:124-132 [P. Mannion/P. Mannion/F. Aspromonte]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 132352: authorized by Philip Mannion, entered by Philip Mannion on 14.08.2012, edited by Evangelos Vlachos
Creative Commons license: CC BY (attribution)
Taxonomic list
Chondrichthyes | |
Myledaphus araucanus guitarfish SGO.PV.6732, one tooth associated to two dermal denticles. SGO.6603, three isolated dermal denticles. SGO.PV.6730, seven isolated teeth. SGO.PV.6598, two associated teeth.
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Scapanorhynchus sp. Woodward 1889 goblin shark SGO.PV.6773, one anterior tooth and eleven lateral teeth.
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Carcharias gracilis Davis 1890 sand shark SGO.PV.19901, one anterior tooth; SGO.PV.6769, ten lateral teeth; SGO.PV.6770, 23 lateral teeth; Additional samples include 162 fragmentary teeth from the same locality.
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Orectolobidae indet. Jordan and Fowler 1903 wobbegong SGO.PV.6776. Three fairly complete teeth with damaged crowns.
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Echinorhinus sp. shark SGO.PV.6764, A complete isolated tooth. SGO.PV.6630, SGO.PV.6632, SGO.PV.6631, SGO.PV.6765. four isolated, incomplete teeth.
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Centrophoroides appendiculatus Agassiz 1835 dogfish shark SGO.PV.6601, 15 teeth; SGO.PV.19902, one isolated tooth. SGO.PV.19902, one lateral tooth. SGO.PV.6779. An isolated dorsal spine.
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Paraorthacodus sp. Glikman 1957 elasmobranch SGO.PV.6604. One parasymphyseal tooth. SGO.PV.6605b. eleven lateral teeth, four anterior teeth and one posterior tooth. SGO.PV.6606. Two anterior teeth and four lateral teeth.
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Ischyrhiza chilensis Wetzel 1930 ray SGO.PV.6771, 13 rostral spines; SGO.PV.6772, 26 rostral spines; additional 54 fragmentary rostral spines.
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Edaphodon kawai Consoli 2006 chimaera SGO.PV.6611, anteriormost part (beak) of a right mandibular. SGO.PV.6612, posterior fragment of a right mandibular. Both found directly associated.
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Reptilia | |
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Mesodermochelys sp. Hirayama and Chitoku 1996 leatherback SGO.PV.6573 (associated remains including incomplete left scapula, right ilium and right pubis)
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Elasmosauridae indet. Cope 1869 elasmosaur SGO.PV.90 (21 articulated vertebrae) and SGO.PV.6572 (17 isolated teeth)
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Mosasauridae indet. Gervais 1852 mosasaur SGO.PV.6570 (one isolated tooth) and SGO.PV.6571 (three isolated crowns)
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