Locality 5, mule trail between El Portachuelo and Palo Quemado (Permian of Venezuela)

Where: Merida, Venezuela (8.0° N, 71.3° W: paleocoordinates 5.5° S, 34.4° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Palmarito Formation, Kungurian (279.3 - 272.3 Ma)

• Large (ca. 8 cubic meter) exotic block sampled for multiple blocks. Stratigraphic position unknown. Palmarito Fm contains Perrinites hilli and Parafusulina of Kungurian age.

• group of beds-level stratigraphic resolution

Environment/lithology: sand shoal; shelly/skeletal, gray, silty packstone

• Moderately good sorting of calcareous grains suggests a bar deposit. Abrasion and sorting also suggest high energy conditions. Absence of much terrigenous material suggests a bar, rather than beach, deposit. Dolomite may indicate slightly restricted conditions.
• Medium-gray, massive, petroliferous limestone. Compositionally a calcarenite, texture of a packstone. Silt-sized and clay-sized material present, as are rare dolomite rhombs.

Size class: macrofossils

Preservation: original calcite, replaced with silica

Collection methods: bulk, chemical, mechanical,

• Etching only recovered a few fossils because of poor silicification. Cut slabs were also examined.

Primary reference: P.R. Hoover. 1981. Paleontology, Taphonomy, and Paleoecology of the Palmarito Formation (Permian of Venezuela). Bulletins of American Paleontology 80(313):1-138 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 41509: authorized by David Bottjer, entered by Matthew Clapham on 15.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Textulariida
 Textulariida -
Textulariida indet. Delage and Hérouard 1896
 Fusulinina - Geinitzinidae
 Fusulinina - Pachyphloiidae
Pachyphloia sp. Lange 1925
Fusulinina
 Palaeotextularoidea - Biseriamminidae
Globivalvulina sp. Schubert 1921
Gastropoda
 Euomphalina - Euomphalidae
"Straparollus (Euomphalus) sp." = Euomphalus
"Straparollus (Euomphalus) sp." = Euomphalus Sowerby 1814 snail
 Prosobranchia - Goniasmatidae
"Taosia sp." = Stegocoelia (Taosia)
"Taosia sp." = Stegocoelia (Taosia) Girty 1939 snail
 Prosobranchia - Orthonematidae
Orthonema sp. Meek and Worthen 1862 snail
 Bellerophontida - Bellerophontidae
"Bellerophon (? Pharkidonotus) sp." = Pharkidonotus
"Bellerophon (? Pharkidonotus) sp." = Pharkidonotus Girty 1912 snail
Yochelson, 1960
 Neritoidea - Naticopsidae
"Naticopsis cf. oblatus" = Naticopsis permica
"Naticopsis cf. oblatus" = Naticopsis permica Netchaev 1894 snail
 Murchisoniina - Gosseletinidae
Apachella sp. Winters 1956 snail
 Murchisoniina - Palaeozygopleuridae
Palaeozygopleura sp. Horný 1955 snail
 Trochoidea - Araeonematidae
"Yunnania" sp. Mansuy 1912 snail
Cephalopoda
 Nautiloidea -
Nautiloidea indet. Agassiz 1847 nautiloid
Orthocone and coiled forms
Strophomenata
 Productida - Productidae
Peniculauris subcostata King 1931
n. ssp. latinamerica