Where: Coahuila, Mexico (28.9° N, 102.4° W: paleocoordinates 31.0° N, 71.2° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Austin Group, Late/Upper Turonian to Late/Upper Turonian (93.5 - 85.8 Ma)
• Limestone in the quarry has been divided into three members (basal gray, middle yellow, upper white); pterosaur-bearing layer is of early Coniacian age
• formation-level stratigraphic resolution
Environment/lithology: offshore shelf; concretionary, pyritic lime mudstone and marl
Size classes: macrofossils, mesofossils, microfossils
Preservation: mold/impression, trace, soft parts, recrystallized, original calcite, replaced with calcite, replaced with pyrite, replaced with phosphate
Primary reference: W. Stinnesbeck, C. Ifrim, H. Schmidt, A. Rindfleisch, M.-C. Buchy, E. Frey, A. H. González-González, F. J. Vega, L. Cavin, G. Keller, and K. T. Smith. 2005. A new lithographic limestone deposit in the Upper Cretaceous Austin Group at El Rosario, county of Múzquiz, Coahuila, northeastern Mexico. Revista Mexicana de Ciencias Geológicas 22:401-418 [R. Butler/R. Butler]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 92293: authorized by Richard Butler, entered by Richard Butler on 05.11.2009, edited by Matthew Carrano and Matthew Clapham
Creative Commons license: CC BY (attribution)
Taxonomic list
Foraminifera | |
Heterohelix sp. Ehrenberg 1843 | |
Dicarinella sp. Porthault 1970 | |
Whiteinella sp. Pessagno 1967 | |
unclassified | |
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Cephalopoda | |
Gaudryceras mite Hauer 1866 ammonite | |
Forresteria brancoi, "Forresteria alluaudi" = Forresteria (Forresteria) alluaudi, Peroniceras tridorsatum
Forresteria brancoi ammonite
"Forresteria alluaudi" = Forresteria (Forresteria) alluaudi Boule et al. 1907 ammonite
Peroniceras tridorsatum Schlüter 1867 ammonite | |
Scaphites frontierensis, Scaphites uintensis, "Scaphites sagensis" = Scaphites (Scaphites) meslei, Scaphites preventricosus
Scaphites frontierensis ammonite
Scaphites uintensis ammonite
"Scaphites sagensis" = Scaphites (Scaphites) meslei de Grossouvre 1894 ammonite
Scaphites preventricosus Cobban 1951 ammonite | |
Baculites yokoyamai Tokunga and Shimizu 1926 ammonite | |
? Neocrioceras sp. ammonite | |
Bivalvia | |
Mytiloides herbichi, Mytiloides incertus, Mytiloides scupini, Cremnoceramus waltersdorfensis, Cremnoceramus crassus, Cremnoceramus deformis
Cremnoceramus deformis Meek 1871 clam Subspecies: deformis and erectus. Occurs higher in the section.
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Malacostraca | |
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Chondrichthyes | |
Elasmobranchii indet. elasmobranch | |
Ptychodus cf. mortoni Mantell 1836 elasmobranch | |
cf. Scapanorhynchus sp. Woodward 1889 goblin shark | |
Reptilia | |
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Muzquizopteryx coahuilensis n. gen. n. sp.1 Frey et al. 2006 pterosaur New genus and species, "Chango"
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Actinopteri | |
Pycnodontiformes indet. Berg 1937 | |
? Cimolichthyoidei indet. Goody 1969 | |
? Prionolepididae indet. Goody 1969 | |
? Enchodontoidei indet. Berg 1937 | |
"Acanthomorpha indet." = Acanthomorphata
"Acanthomorpha indet." = Acanthomorphata Rosen 1973 | |
Ichthyodectiformes indet. Bardack and Sprinkle 1969
Tselfatiiformes indet. Nelson 1994 |