Vallecillo quarry (CPC collection) (Cretaceous of Mexico)

Where: Nuevo León, Mexico (26.7° N, 100.0° W: paleocoordinates 28.0° N, 69.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Pseudaspidoceras flexuosum ammonoid zone, Vallecillo Platy Limestone Member (Agua Nueva Formation), Early/Lower Turonian (93.5 - 89.3 Ma)

• late Early Turonian, thanks to the presence of the ammonite Mammites nodosoides

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; lithified, ferruginous limestone

• These strata were deposited in a moderately deep shelf of low relief, which were developed along the western coast of the Gulf of Mexico extending as far as the Western Interior of the United States of America and Gulf of Mexico Basin. Low oxygen.
• Cenomanian to Turonian Agua Nueva Formation, a dominantly carbonate unit comprising thick sequences of cyclic limestone and shale that are widely distributed in northeastern Mexico.

Size class: macrofossils

Collection methods: quarrying,

• Repository: CPC, Colección Paleontológica de Coahuila of the Museo del Desierto in Saltillo, Coahuila

Primary reference: E. Frey, E. W. A. Mulder, W. Stinnesbeck, H. E. Rivera-Sylva, J. M. Padilla-Gutiérrez and A. H. González-González. 2017. A new polycotylid plesiosaur with extensive soft tissue preservation from the early Late Cretaceous of northeast Mexico. Boletín de la Sociedad Geológica Mexicana 69(1):87-134 [V. Fischer/V. Fischer/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 186284: authorized by Valentin Fischer, entered by Valentin Fischer on 19.06.2017, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Malacostraca
 Isopoda - Cymothoidae
Mothocya vallecillae n. sp.3 Stinnesbeck et al. 2022 isopod
INAH-REG2544-PF196/CPC2798
Cephalopoda
 Octobrachia - Plesioteuthidae
Boreopeltis ifrimae n. sp.1 Fuchs and Stinnesbeck 2021
CPC 2796, 2797
Reptilia
 Plesiosauria - Polycotylidae
Mauriciosaurus fernandezi n. gen. n. sp. Frey et al. 2017 plesiosaur
INAH CPC RFG 2544 P.F.1 a juvenile polycotylid plesiosaur with soft tissue preservation
Actinopteri
 Crossognathiformes - Pachyrhizodontidae
Goulmimichthys roberti3 Blanco and Cavin 2003