Rio La Leona Valley, Cerro Fortaleza locality (Cretaceous of Argentina)

Also known as Dreadnoughtus type

Where: Santa Cruz, Argentina (49.9° S, 72.0° W: paleocoordinates 52.4° S, 58.6° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Cerro Fortaleza Formation, Campanian (83.6 - 72.1 Ma)

• Approximately 350 m below the top of the formation

•

•Campanian age (Ghiglione et al. 2021)

• bed-level stratigraphic resolution

Environment/lithology: crevasse splay; sandstone and mudstone

• Mixed lithosome of sandstone with small-scale cross-bedding and scour-and-fill structures, and mudstone with allochthonous plant remains

Size class: macrofossils

• MPM-PV 1156, a partially articulated partial skeleton that comprises a maxilla fragment, a

•tooth, a posterior cervical vertebra, cervical ribs, multiple dorsal vertebrae and ribs, the sacrum, 32 caudal vertebrae and 18 haemal arches (including an articulated sequence of 17 anterior and middle caudal vertebrae and their corresponding haemal arches), the left

•pectoral girdle and forelimb minus the manus, both sternal plates, all pelvic elements, the left hind limb lacking the pes, and the right tibia, metatarsals I and II, and pedal ungual I.

•MPM-PV 3546, a partially articulated postcranial skeleton of a slightly smaller individual that includes a partial anterior cervical vertebra, multiple dorsal vertebrae and ribs, the sacrum, seven caudal vertebrae and five haemal arches, all pelvic elements, and the left femur

Collected in 2005

Collection methods: quarrying, surface (in situ),

• MPM, Museo Padre Molina, Río Gallegos, Argentina

Primary reference: K. J. Lacovara, M. C. Lamanna, L. M. Ibiricu, J. C. Poole, E. R. Schroeter, P. V. Ullmann, K. K. Voegele, Z. M. Boles, A. M. Carter, E. K. Fowler, V. M. Egerton, A. E. Moyer, C. L. Coughenour, J. P. Schein, J. D. Harris, R. D. Martínez, and F. E. Novas. 2014. A gigantic, exceptionally complete titanosaurian sauropod dinosaur from southern Patagonia, Argentina. Scientific Reports 4:6196:1-9 [P. Mannion/P. Mannion/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 161337: authorized by Philip Mannion, entered by Philip Mannion on 04.09.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Saurischia -
Dreadnoughtus schrani n. gen. n. sp.
Dreadnoughtus schrani n. gen. n. sp. Lacovara et al. 2014 sauropod
MPM-PV 1156 – holotype, partially artic. partial skeleton: maxilla frag, tooth, posterior cervical vertebra, cervical ribs, multiple dorsal vertebrae & ribs, sacrum, 32 caudal vertebrae & 18 haemal arches [incl. an artic. sequence of 17 anterior & middle caudal vertebrae & their haemal arches], L pectoral girdle & forelimb minus the manus, both sternal plates, all pelvic elements, L hind limb lacking pes, and R tibia, metatarsals I & II, & pedal ungual I; MPM-PV 3546 – paratype, partially artic. postcranial skeleton of slightly smaller individual: partial anterior cervical vertebra, multiple dorsal vertebrae & ribs, sacrum, 7 caudal vertebrae & 5 haemal arches, all pelvic elements, and L femur.