Assemblage 1, La Morita [Chejendé Mbr, La Luna Fm] (Cretaceous of Venezuela)

Where: Venezuela (9.3° N, 68.8° W: paleocoordinates 3.1° N, 45.2° 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 1 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 88078: 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 - Desmoceratidae
Puzosia aff. orientalis
Puzosia aff. orientalis ammonite
SUBSPECIES: Puzosia aff. orientalis intermedia
 Ammonitida - Acanthoceratidae
Mitonia gracilis, Mitonia venezolana, Mitonia constricta n. sp., Mammites aff. nodosoides, "Paramammites polymorphus" = Paramammites polymorphum, Pseudaspidoceras sp.
Mitonia gracilis Renz and Alvarez 1979 ammonite
Mitonia venezolana Renz and Alvarez 1979 ammonite
Mitonia constricta n. sp. Renz 1982 ammonite
Mammites aff. nodosoides Schlüter 1871 ammonite
SUBSPECIES: Mammites aff. nodosoides wingi
"Paramammites polymorphus" = Paramammites polymorphum Pervinquiére 1907 ammonite
SUBSPECIES: Paramammites polymorphus pinguis
Pseudaspidoceras sp. Hyatt 1903 ammonite
 Ammonitida - Vascoceratidae
Pseudoneoptychites sp., Pseudoneoptychites intermedius n. sp., Pseudoneoptychites venezolanus n. sp., Pseudoneoptychites difficilis, Pseudoneoptychites andinus, Vascoceras venezolanum n. sp., "Nannovascoceras intermedium" = Nannovascoceras intermedium, "Nannovascoceras constrictum" = Nannovascoceras intermedium, "Nannovascoceras costatum" = Nannovascoceras intermedium, "Fagesia levis n. sp." = Fagesia peroni, Fagesia aff. superstes
Pseudoneoptychites sp. Leanza 1967 ammonite
Pseudoneoptychites intermedius n. sp. Renz 1982 ammonite
Pseudoneoptychites venezolanus n. sp. Renz 1982 ammonite
Pseudoneoptychites difficilis Leanza 1967 ammonite
Pseudoneoptychites andinus Leanza 1967 ammonite
Vascoceras venezolanum n. sp. Renz 1982 ammonite
"Nannovascoceras intermedium" = Nannovascoceras intermedium Renz and Alvarez 1979 ammonite
"Nannovascoceras constrictum" = Nannovascoceras intermedium Renz and Alvarez 1979 ammonite
"Nannovascoceras costatum" = Nannovascoceras intermedium Renz and Alvarez 1979 ammonite
"Fagesia levis n. sp." = Fagesia peroni Pervinquiére 1907 ammonite
Fagesia aff. superstes Kossmat 1897 ammonite
 Ammonitida - Pseudotissotidae
"Hoplitoides munieri" = Wrightoceras munieri
"Hoplitoides munieri" = Wrightoceras munieri Pervinquiére 1907 ammonite