Arroyo El Rosario (LACM Loc. 66168) (Cretaceous of Mexico)

Also known as 6751, Arroyo del Rosario

Where: Baja California, Mexico (30.2° N, 115.7° W: paleocoordinates 35.6° N, 86.4° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: El Diesacado Member (El Gallo Formation), Late/Upper Campanian (83.5 - 70.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: crevasse splay; lithology not reported

• "Overbank stream deposit"

Size class: macrofossils

Preservation: mold/impression, soft parts

Collected by Tabrum, Morris in 1966–1974; reposited in the LACM

Collection methods: quarrying, mechanical,

Primary reference: W. J. Morris. 1967. Baja California: Late Cretaceous dinosaurs. Science 155(3769):1539-1541 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 55384: authorized by Matthew Carrano, entered by Kaitlin Maguire on 13.10.2005, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Ornithischia - Hadrosauridae
"? Lambeosaurus laticaudus n. sp." = Magnapaulia laticaudus
"? Lambeosaurus laticaudus n. sp." = Magnapaulia laticaudus Morris 1981 lambeosaurine
LACM 17705–17713, 17715–17717; IGM 5843–5852