New insights on the avian trace fossil record from NE Mexico: Evidences on the diversity of latest Maastrichtian web-footed bird tracks
Por:
Ines Serrano-Branas, Claudia, Espinosa-Chavez, Belinda, Flores Ventura, Jose, Barrera-Guevara, Daniel, Torres-Rodriguez, Esperanza, Vega, Francisco J.
Publicada:
1 ene 2022
Resumen:
In this study we describe three new web-footed bird tracks found in
uppermost Maastrichtian strata of Las Encinas Formation, southeast
Coahuila, NE Mexico. The described materials were collected at Rancho
San Francisco locality, Ramos Arizpe County. These bird tracks can be
ecomorphologically compared with those of modern members of the Order
Anseriformes and the Family Ardeidae (Order Pelecaniformes). Associated
invertebrate ichnotaxa include Cochlichnus and Skolithos. The
co-occurrence of Leptoptilostipus isp., morphotype A and morphotype B
with several invertebrate traces at Rancho San Francisco suggests that
this area could represent a feeding site with abundant food sources
during the latest Maastrichtian. These new bird footprints add to the
previous reports of avian trace fossils for the Upper Cretaceous of the
state of Coahuila and suggest that the Rancho San Francisco tracksite
can be considered up to now, as the richest locality of web-footed bird
tracks worldwide.
Filiaciones:
Ines Serrano-Branas, Claudia:
Benemerita Escuela Normal Coahuila, Calzada Maestros 858, Saltillo 25000, Coahuila, Mexico
Smithsonian Inst, Dept Paleobiol, Natl Museum Nat Hist, Washington, DC 20013 USA
Espinosa-Chavez, Belinda:
Benemerita Escuela Normal Coahuila, Calzada Maestros 858, Saltillo 25000, Coahuila, Mexico
Flores Ventura, Jose:
Santa Engracia 257, Saltillo 25015, Coahuila, Mexico
Barrera-Guevara, Daniel:
Prepa Tec Garza Laguera, Puerto Topolobampo 4603, Monterrey 64790, Nuevo Leon, Mexico
Torres-Rodriguez, Esperanza:
Univ Nacl Autonoma Mexico, Inst Geol, Ciudad Univ, Coyoacan 04510, Cdmx, Mexico
Vega, Francisco J.:
Univ Nacl Autonoma Mexico, Inst Geol, Ciudad Univ, Coyoacan 04510, Cdmx, Mexico
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