Hacienda de Saucillo near Saltillo (Cretaceous of Mexico)

Where: Mexico (25.4° N, 101.0° W: paleocoordinates 24.3° N, 57.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Late/Upper Aptian (122.5 - 113.0 Ma)

• STRATIGRAPHIC RELATIONS: From unnamed unit, overlying lower Aptian limestones. THICKNESS: From beds within a 30 m thick unit. AGE: Upper Aptian (Gargasian) based on ammonite biostratigraphy. STRATIGRAPHIC POSITION: Unknown position within lithostratigraphic unit.

• group of beds-level stratigraphic resolution

Environment/lithology: poorly lithified, gray, red marl and poorly lithified, black limestone

• ENVIRONMENT: Environmental data not provided in text, assumed to be carbonate.
• SPECIFIC LITHOLOGY: Reddish gray marls and thin-bedded black limestones. LITHIFICATION: Poorly lithified, based on facies, taphonomy and age.

Size class: macrofossils

Collection methods: quarrying,

• COLLECTOR: Presumably Böse and Cavins. REPOSITORY: Bureau of Economic Geology, University of Texas, Austin.

Primary reference: E. Böse and O.A. Cavins. 1927. The Cretaceous and Tertiary of southern Texas and northern Mexico. University of Texas Bulletin 2748:1-142 [A. Hendy/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 65624: authorized by Austin Hendy, entered by Austin Hendy on 23.09.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Appears to only contain ammonoidea, although some bivalvia and echinoidea are listed elsewhere in text for different collections. NOMENCLATURE: Somewhat outdated nomenclature although author consistently used species level designations.
Show authors, comments, and common names
Echinoidea
 Spatangoida - Toxasteridae
Toxaster sp.
Toxaster sp. Agassiz 1839 heart urchin
Rhynchonellata
 Rhynchonellida - Rhynchonellidae
Rhynchonella nuciformis
Bivalvia
 Pectinida - Pectinoidae
"Vola cf. morrisi" = Pecten (Vola)
"Vola cf. morrisi" = Pecten (Vola) scallop
Cephalopoda
 Ammonitida - Douvilleiceratidae
Douvilleiceras cf. pretiosum, Douvilleiceras aff. cornueli, Douvilleiceras cf. delgoense, Douvilleiceras martini, Douvilleiceras volgense, Douvilleiceras wilfridi, Douvilleiceras "n. sp.", "Douvilleiceras tschernyschewi" = Cheloniceras (Epicheloniceras) tschernyschewi, "Douvilleiceras cf. buxtorfi" = Cheloniceras buxtorfi
Douvilleiceras martini ammonite
Incl. D. martini occidentalis
Douvilleiceras "n. sp." Grossouvre 1894 ammonite
"Douvilleiceras tschernyschewi" = Cheloniceras (Epicheloniceras) tschernyschewi Sinzow 1906 ammonite
"Douvilleiceras cf. buxtorfi" = Cheloniceras buxtorfi Jacob and Tobler 1906 ammonite
 Ammonitida - Acanthohoplitidae
"Acanthoplites aff. crassicostatus" = Acanthohoplites, "Acanthoplites aff. gragasensis" = Acanthohoplites, "Acanthoplites cf. uhligi" = Acanthohoplites, "Acanthoplites "n. sp."" = Acanthohoplites, "Acanthoplites sp." = Acanthohoplites
"Acanthoplites aff. crassicostatus" = Acanthohoplites ammonite
"Acanthoplites aff. gragasensis" = Acanthohoplites ammonite
"Acanthoplites cf. uhligi" = Acanthohoplites ammonite
"Acanthoplites "n. sp."" = Acanthohoplites Sinzow 1908 ammonite
"Acanthoplites sp." = Acanthohoplites Sinzow 1908 ammonite
 Ammonitida - Hamitidae
Hamites cf. tropicalis
Hamites cf. tropicalis Meunier 1888 ammonite
 Ammonitida - Ancyloceratidae
Ancyloceras cf. matheroni
Ancyloceras cf. matheroni d'Orbigny 1842 ammonite
 Ammonitida - Parahoplitidae
Parahoplites aff. consobrinus, Parahoplites aff. melchioris
Parahoplites aff. melchioris Anthula 1899 ammonite
 Ammonitida - Deshayesitidae
"Dufrenoya aff. furcata" = Dufrenoyia, "Dufrenoya texana" = Dufrenoyia, "Dufrenoya "n. sp."" = Dufrenoyia
"Dufrenoya aff. furcata" = Dufrenoyia ammonite
"Dufrenoya texana" = Dufrenoyia ammonite
"Dufrenoya "n. sp."" = Dufrenoyia Kilian and Reboul 1915 ammonite
 Ammonitida - Neocomitidae
Neocomites sp.
Neocomites sp. Uhlig 1905 ammonite
 Ammonitida - Desmoceratidae
Uhligella cf. zurcheri, Uhligella subnosocostatum, Puzosia sp., "Puzosia cf. matheroni" = Pseudohaploceras matheroni
Puzosia sp. Bayle 1878 ammonite
"Puzosia cf. matheroni" = Pseudohaploceras matheroni d'Orbigny 1840 ammonite