Assemblage 2, Los Mamones [Chejendé Mbr, La Luna Fm] (Cretaceous of Venezuela)

Where: Trujillo, Venezuela (9.6° N, 70.3° W: paleocoordinates 2.5° N, 47.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Mammites nodosoides ammonoid zone, Chejendé Member (La Luna Formation), Early/Lower Turonian (93.5 - 89.3 Ma)

• STRATIGRAPHIC RELATIONS: From the Chejendé Mbr of the La Luna Fm, which regionally overlies the La Puya and Peñas Altas Fms (Albian-Aptian) and is overlain by the Colón Fm. AGE: Early Turonian, on the basis of ammonoid biostratigraphy; Mammites nodosoides zone. STRATIGRAPHIC POSITION: From assemblage 2 of the Chejendé Mbr.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

• ENVIRONMENT: Not stated, but said to be facies which become euxinic, from a shale lateral equivalent.
• SPECIFIC LITHOLOGY: Not stated, but presumably siliciclastic. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Preservation: mold/impression

Collected by Renz

Collection methods: surface (in situ),

• COLLECTOR: O. Renz. REPOSITORY: Renz coll., Compania, Shell de Venezuela.

Primary reference: O. Renz. 1982. The Cretaceous ammonites of Venezuela 1-132 [A. Hendy/A. Hendy/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 88076: authorized by Austin Hendy, entered by Austin Hendy on 31.03.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for ammonites. NOMENCLATURE: Authoritative publication, with modern nomenclature, and species-resolution identifications.
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Cephalopoda
 Ammonitida - Tetragonitidae
Zelandites sp., Anagaudryceras sp.
Zelandites sp. Marshall 1926 ammonite
Anagaudryceras sp. Shimizu 1934 ammonite
 Ammonitida - Vascoceratidae
"Nannovascoceras sp." = Vascoceras, "Fagesia aff. haarmanni" = Fagesia catinus
"Nannovascoceras sp." = Vascoceras Choffat 1898 ammonite
"Fagesia aff. haarmanni" = Fagesia catinus Mantell 1822 ammonite
 Ammonitida - Acanthoceratidae
Watinoceras venezolanum n. sp., Watinoceras reesidei, Mammites nodosoides, Mammites spinosus, Pseudaspidoceras armatum, "Kamerunoceras (Schindewolfites) andinum n. sp." = Kamerunoceras andinum, Kamerunoceras (Schindewolfites) ganuzai, "Paramammites polymorphus" = Paramammites polymorphum
Watinoceras venezolanum n. sp. Renz 1982 ammonite
Watinoceras reesidei Warren 1930 ammonite
Mammites nodosoides Schlüter 1871 ammonite
Mammites spinosus Basse 1940 ammonite
Pseudaspidoceras armatum Pervinquière 1907 ammonite
"Kamerunoceras (Schindewolfites) andinum n. sp." = Kamerunoceras andinum Renz 1982 ammonite
"Paramammites polymorphus" = Paramammites polymorphum Pervinquiére 1907 ammonite
SUBSPECIES: Paramammites polymorphus gracilis
 Ammonitida - Coilopoceratidae
Hoplitoides mirabilis
Hoplitoides mirabilis Pervinquiére 1907 ammonite
Foraminifera
 Globigerinaceae - Globotruncanidae
Rugoglobigerina sp.