Coordinates: 17°18′N 97°42′W / 17.3°N 97.7°W / 17.3; -97.7

Sabinal Formation

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Sabinal Formation
Stratigraphic range: Kimmeridgian to Valanginian
Typesedimentary
Unit ofTlaxiaco Basin
UnderliesTlaxiaco Formation
OverliesConsuelo Group, Tecocoyuncan Group
Lithology
PrimaryShale
OtherMudstone, wackestone, marl
Location
CoordinatesLua error in Module:Coordinates at line 489: attempt to index field 'wikibase' (a nil value).
Approximate paleocoordinatesLua error: callParserFunction: function "#coordinates" was not found.
RegionOaxaca
CountryMexico

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] The most prolific site of the formation is the Kimmeridgian-aged Llano Yosobe site near Tlaxiaco.[1]

Vertebrate paleobiota

[edit | edit source]

Cartilaginous fish

[edit | edit source]
Cartilaginous fish of the Sabinal Formation
Genus Species Location Stratigraphic position Material Notes Images
Planohybodus P. sp. Yosobé Kimmeridgian Teeth A hybodont.[1] File:FOS763.jpg

Ray-finned fish

[edit | edit source]
Ray-finned fish of the Sabinal Formation'
Genus Species Location Stratigraphic position Material Notes Images
Belonostomus B. ornatus Cerro de la Virgen Berriasian An aspidorhynchid.[3][4] File:Belonostomus fossil cropped.png
Gyrodus G. sp. Yosobé Kimmeridgian Teeth, partial skeleton A pycnodont. The most abundant vertebrate fossil in the formation.[1] File:Gyrodus hexagonus.png
Nhanulepisosteus N. mexicanus Yosobé Kimmeridgian Partial cranium A gar, the earliest known from the fossil record.[5] File:Nhanulepisosteus mexicanus (10.3897-zse.95.35435) Figure 3 (cropped).jpg
Otomitla O. mexicana Cerro de la Virgen Berriasian An ichthyodectiform.[4]
O. speciosa
Pleuropholidae indet. Yosobé Kimmeridgian Trunk with scales A pleuropholid.[1]
Pleuropholis P. cisnerosorum Yosobé Kimmeridgian Partial skull A pleuropholid.[6] File:Pleuropholis sp. (JME-ETT2980).jpg
?Thrissops T. sp. Cerro de la Virgen Berriasian An ichthyodectiform.[4] File:Thrissops cf formosus 01.jpg
Vinctifer V. ferrusquiai Yosobé Kimmeridgian Parts of head and trunk An aspidorhynchid.[7] File:Aspidorhynchidae - Vinctifer comptoni.JPG

Reptiles

[edit | edit source]

Crocodylomorphs

[edit | edit source]
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] File:Maldictosuchus.png
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] File:Torvoneustes carpenteri.jpg

Turtles

[edit | edit source]
Turtles of the Sabinal Formation
Genus Species Location Stratigraphic position Material Notes Images
Notoemys N. tlaxiacoensis Yosobé Kimmeridgian Nearly complete carapace with plastron A stem-group sideneck turtle.[10][11]

Plesiosaurs

[edit | edit source]
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] File:Liopleurodon after Tarlo.jpg
Pliosauridae indet. Yosobé Kimmeridgian Vertebrae and ribs An indeterminate pliosaur. Remains appear to have been scavenged by Planohybodus.[12]

Ichthyosauria

[edit | edit source]
Ichthyosaurs of the Sabinal Formation
Genus Species Location Stratigraphic position Material Notes Images
Ophthalmosauridae indet. Yosobé Kimmeridgian Vertebrae An ophthalmosaurid ichthyosaur.

References

[edit | edit source]
  1. ^ a b c d e Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  2. ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  3. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  4. ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  5. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  6. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  7. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  8. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  9. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  10. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  11. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  12. ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
Retrieved from "http://70.231.62.181/index.php?title=Sabinal_Formation&oldid=20519267"