La Paragua, Barroisiceras zone [Timbetes Mbr, La Luna Fm] (Cretaceous of Venezuela)

Where: Trujillo, Venezuela (9.6° N, 70.3° W: paleocoordinates 3.3° N, 47.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Barroisiceras ammonoid zone, Timbetes Member (La Luna Formation), Early/Lower Coniacian (89.3 - 85.8 Ma)

• STRATIGRAPHIC RELATIONS: From the Timbetes Mbr of the La Luna Fm, which regionally overlies the Chejendé Mbr, La Puya and Peñas Altas Fms (Albian-Aptian) and is overlain by the Colón Fm. AGE: Early Coniacian; on the basis of ammonite biostratigraphy. STRATIGRAPHIC POSITION: From Barroisiceras zone.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary, gray limestone

• ENVIRONMENT: Not stated, but said to be facies which become euxinic, from a shale lateral equivalent.
• SPECIFIC LITHOLOGY: Limestone, dark gray, hard, dense, splintery and weather to be a light gray color. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Preservation: mold/impression, concretion

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 88268: authorized by Austin Hendy, entered by Austin Hendy on 05.04.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for ammonites. NOMENCLATURE: Authoritative publication, with modern nomenclature, and species-resolution identifications.
Show authors, comments, and common names
Cephalopoda
 Ammonitida - Baculitidae
Baculites inornatus
Baculites inornatus Meek 1862 ammonite
 Ammonitida - Schloenbachiidae
"Barroisiceras (Barroisiceras) subtuberculatum" = Schloenbachia varians subtuberculata
"Barroisiceras (Barroisiceras) subtuberculatum" = Schloenbachia varians subtuberculata Gerhardt 1897 ammonite
 Ammonitida - Collignoniceratidae
"Barroisiceras (Texasia) dentatocarinatum" = Barroisiceras (Texanites) dentatocarinatum, ? Solgerites sp., Barroisiceras (Barroisiceras) aff. onilahyense, Forresteria sp., Forresteria stantoni, Forresteria pitalensis, "? Harleites sp." = Forresteria (Harleites)
"Barroisiceras (Texasia) dentatocarinatum" = Barroisiceras (Texanites) dentatocarinatum Roemer 1849 ammonite
? Solgerites sp. Reeside 1932 ammonite
Forresteria sp. Reeside 1932 ammonite
Forresteria stantoni Reeside 1932 ammonite
Forresteria pitalensis Steinmann 1881 ammonite
"? Harleites sp." = Forresteria (Harleites) Reeside 1932 ammonite
 Ammonitida - Sphenodiscidae
Paralenticeras sieversi
Paralenticeras sieversi Gerhardt 1897 ammonite