Cerro Dientes (Cretaceous of Argentina)

Where: Río Negro, Argentina (39.7° S, 66.7° W: paleocoordinates 42.1° S, 54.7° W)

• coordinate stated in text

When: Jagüel Formation (Malargüe Group), Late/Upper Maastrichtian (70.6 - 66.0 Ma)

Environment/lithology: marine; mudstone

• Shallow inner-platform environment

Size class: macrofossils

Collection methods: MML, Museo Municipal de Lamarque, Rio Negro, Argentina

Primary reference: S. Bogan and F. L. Agnolin. 2010. Primera ictiofauna marina del Cretácico Superior (Formación Jaguel, Maastrichtiano) de la provincia de Río Negro, Argentina. Papéis Avulsos de Zoologia 50(12):175-188 [E. Vlachos/F. Aspromonte/F. Aspromonte]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 231889: authorized by Evangelos Vlachos, entered by Franco Aspromonte on 27.09.2023

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Actinopteri
 Aulopiformes - Enchodontidae
Enchodus sp., aff. Enchodus ferox, aff. Enchodus gladiolus
Enchodus sp. Agassiz 1835
3 teeth (MML 415‑417) and a dentary fragment (MML 418)
aff. Enchodus ferox Leidy 1855
3 isolated teeth (MML 412‑414)
aff. Enchodus gladiolus Cope 1872
1 tooth (MML 227)
Chondrichthyes
 Euselachii -
Lamniformes indet.
Lamniformes indet. Berg 1958 mackerel shark
1 incomplete vertebra (MML 345) and 456 teeth (MML lote 346)
 Lamniformes - Carchariidae
Carcharias sp.
Carcharias sp. Rafinesque 1810 sand shark
4 upper anterior teeth (MML 289‑292), 3 lower anterior teeth (MML 293‑295), 17 upper lateral teeth (MML 296‑312), 10 lower lateral teeth (MML 313‑322) and 1 posterior tooth (MML 323)
 Lamniformes - Anacoracidae
Squalicorax pristodontus
Squalicorax pristodontus Agassiz 1835 crow shark
2 lateral teeth (MML 410‑411)
 Lamniformes - Serratolamnidae
Serratolamna serrata
Serratolamna serrata Agassiz 1838 mackerel shark
16 anterior teeth (MML 229‑244) and 44 lateral teeth (MML 245‑288)
 Lamniformes - Odontaspididae
Odontaspis sp.
Odontaspis sp. Agassiz 1838 sand tiger shark
12 anterior teeth (MML 324‑335), 1 intermediate tooth (MML 336) and 8 lateral teeth (MML 337‑344)
 Lamniformes - Otodontidae
Cretalamna appendiculata
Cretalamna appendiculata Agassiz 1835 mackerel shark
2 lateral teeth (MML 225‑226)
 Myliobatiformes -
Hypolophodon patagoniensis
Hypolophodon patagoniensis Cione et al. 2013 stingray
1 eroded tooth (MML 228)