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 - Coilopoceratidae
Hoplitoides mirabilis
Hoplitoides mirabilis Pervinquiére 1907 ammonite
 Ammonitida - Vascoceratidae
"Fagesia aff. haarmanni" = Fagesia catinus, "Nannovascoceras sp." = Vascoceras
"Fagesia aff. haarmanni" = Fagesia catinus Mantell 1822 ammonite
"Nannovascoceras sp." = Vascoceras Choffat 1898 ammonite
 Ammonitida - Acanthoceratidae
Mammites spinosus, Mammites nodosoides, Watinoceras venezolanum n. sp., Watinoceras reesidei, Kamerunoceras (Schindewolfites) ganuzai, "Kamerunoceras (Schindewolfites) andinum n. sp." = Kamerunoceras andinum, Pseudaspidoceras armatum, "Paramammites polymorphus" = Paramammites polymorphum
Mammites spinosus Basse 1940 ammonite
Mammites nodosoides Schlüter 1871 ammonite
Watinoceras venezolanum n. sp. Renz 1982 ammonite
Watinoceras reesidei Warren 1930 ammonite
"Kamerunoceras (Schindewolfites) andinum n. sp." = Kamerunoceras andinum Renz 1982 ammonite
Pseudaspidoceras armatum Pervinquière 1907 ammonite
"Paramammites polymorphus" = Paramammites polymorphum Pervinquiére 1907 ammonite
SUBSPECIES: Paramammites polymorphus gracilis
Foraminifera
 Globigerinaceae - Globotruncanidae
Rugoglobigerina sp.