Geological formation in Oaxaca, Mexico
The Sabinal Formation is a Late Jurassic and Early Cretaceous -aged geological formation in Oaxaca, Mexico . It preserves a highly diverse marine fauna.[ 1] [ 2]
It was initially thought to only encompass the Late Jurassic (Kimmeridgian & Tithonian ), but more recent studies have redefined it to cover the earliest Cretaceous (Berriasian & Valanginian ) as well. It is part of the Tlaxiaco Basin , a prominent structural basin in southern Mexico that accumulated both continental and marine sediments between the Early Jurassic and the Paleogene .[ 2] Kimmeridgian -aged Llano Yosobe site near Tlaxiaco .[ 1]
Vertebrate paleobiota [ edit ]
Crocodylomorphs of the Sabinal Formation
Genus
Species
Location
Stratigraphic position
Material
Notes
Images
Maledictosuchus M. nuyivijanan
Yosobé
Kimmeridgian
Nearly complete cranium, jaws, and some vertebrae
A metriorhynchid thalattosuchian . First record of this genus outside Europe.[ 8]
Torvoneustes T. mexicanus (=Plesiosaurus mexicanus , Cricosaurus mexicanus )
Unknown, but most likely Yosobé
Kimmeridgian
Parts of cranium and jaws
A metriorhynchid thalattosuchian. First record of this genus outside Europe.[ 9]
Plesiosaurs of the Sabinal Formation
Genus
Species
Location
Stratigraphic position
Material
Notes
Images
Liopleurodon L. sp.
Yosobé
Kimmeridgian
Partial jaw with teeth
A pliosaur . First record of this genus outside Europe.[ 12]
Pliosauridae indet.
Yosobé
Kimmeridgian
Vertebrae and ribs
An indeterminate pliosaur. Remains appear to have been scavenged by Planohybodus [ 12]
^ a b c d e Alvarado-Ortega, Jesús; Barrientos-Lara, Jair Israel; Espinosa-Arrubarrena, Luis; Pilar Melgarejo-Damián, María del (2014-07-09). "Late Jurassic marine vertebrates from Tlaxiaco, Oaxaca State, southern Mexico" . Palaeontologia Electronica . doi :10.26879/454 . Retrieved 2025-01-27 . ^ a b Zell, Patrick; Stinnesbeck, Wolfgang; Beckmann, Seija; Adatte, Thierry; Hering, Fabio (2015-10-01). "The Berriasian–Valanginian (Early Cretaceous) boundary transition at Santa Catarina Ticuá, Oaxaca state, southern Mexico: Ammonites, bivalves, calpionellids and their paleobiogeographic significance" Journal of South American Earth Sciences . 62 : 33– 57. Bibcode :2015JSAES..62...33Z . doi :10.1016/j.jsames.2015.04.009 . ISSN 0895-9811 . ^ Van Vranken, Nathan E.; Fielitz, Christopher; Ebersole, Jun A. (2019-09-13). "New occurrences of Belonostomus (Teleostomorpha: Aspidorhynchidae) from the Late Cretaceous of the North American Gulf Coastal Plain, USA" . Palaeontologia Electronica . doi :10.26879/983 . Retrieved 2025-01-27 . ^ a b c GONZÁLEZ-RODRÍGUEZ, KATIA A.; FIELITZ, CHRISTOPHER; BRAVO-CUEVAS, VICTOR M.; BAÑOS-RODRÍGUEZ, ROCÍO E. (2016). "CRETACEOUS OSTEICHTHYAN FISH ASSEMBLAGES FROM MEXICO" . New Mexico Museum of Natural History and Science Bulletin (71). ^ Brito, Paulo M.; Alvarado-Ortega, Jésus; Meunier, François J. (2017-12-19). "Earliest known lepisosteoid extends the range of anatomically modern gars to the Late Jurassic" . Scientific Reports . 7 (1): 17830. Bibcode :2017NatSR...717830B . doi :10.1038/s41598-017-17984-w . ISSN 2045-2322 . PMC 5736718 PMID 29259200 . ^ Alvarado-Ortega, Jesús; Brito, Paulo M. (2016-09-02). "A Jurassic pleuropholid fish (Teleostei, Pleuropholidae) in the Tethys Sea domain of North America" Journal of Vertebrate Paleontology . 36 (5): e1201767. Bibcode :2016JVPal..36E1767A . doi :10.1080/02724634.2016.1201767 . ISSN 0272-4634 . {{cite journal }}: CS1 maint: article number as page number (link )^ Cantalice, Kleyton M.; Alvarado-Ortega, Jesús; Brito, Paulo M.; Cantalice, Kleyton M.; Alvarado-Ortega, Jesús; Brito, Paulo M. (2018). "On the occurrence of Vinctifer ferrusquiai sp. nov. (Actinopterygii, Aspidorhynchiformes) in the Kimmeridgian (Late Jurassic) deposits near Tlaxiaco, Oaxaca, southern Mexico" . Revista Mexicana de Ciencias Geológicas . 35 (2): 179– 187. Bibcode :2018RMxCG..35..179C . doi :10.22201/cgeo.20072902e.2018.2.713 ISSN 1026-8774 . ^ Barrientos-Lara, Jair I.; Alvarado-Ortega, Jesús; Fernández, Marta S. (2018-07-04). "The marine crocodile Maledictosuchus (Thalattosuchia, Metriorhynchidae) from the Kimmeridgian deposits of Tlaxiaco, Oaxaca, southern Mexico" Journal of Vertebrate Paleontology . 38 (4): (1)–(14). doi :10.1080/02724634.2018.1478419 . hdl :11336/82460 . ISSN 0272-4634 . ^ Barriento Lara, Jair Israel; Herrera, Laura Yanina; Fernández, Marta Susana; Alvarado Ortega, Jesús (2016). "Occurrence of Torvoneustes (crocodylomorpha, metriorhynchidae) in marine jurassic deposits of Oaxaca, Mexico" . Revista Brasileira de Paleontologia . 19 (3): 415– 424. doi :10.4072/rbp.2016.3.07 . hdl :11336/130337 ISSN 1519-7530 . ^ López-Conde, Oliver A.; Sterli, Juliana; Alvarado-Ortega, Jesus; Chavarría-Arellano, María L. (2017). "A new platychelyid turtle (Pan-Pleurodira) from the Late Jurassic (Kimmeridgian) of Oaxaca, Mexico" Papers in Palaeontology . 3 (2): 161– 174. Bibcode :2017PPal....3..161L . doi :10.1002/spp2.1069 . ISSN 2056-2802 . ^ Conde, Oliver A. López; Ortega, Jesús Alvarado (2021-12-01). "New remains of Notoemys tlaxiacoensis from the Llano Yosobé, Sabinal Formation (Upper Jurassic, Kimmeridgian), Oaxaca, Mexico" Revista Paleontología Mexicana . 10 (2): 123– 128. doi :10.22201/igl.05437652e.2021.10.2.306 ISSN 2007-5189 . ^ a b Barrientos-Lara, Jair Israel; Fernández, Marta S.; Alvarado-Ortega, Jesús; Barrientos-Lara, Jair Israel; Fernández, Marta S.; Alvarado-Ortega, Jesús (2015). "Kimmeridgian pliosaurids (Sauropterygia, Plesiosauria) from Tlaxiaco, Oaxaca, southern Mexic" . Revista Mexicana de Ciencias Geológicas . 32 (2): 293– 304. ISSN 1026-8774 . 
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