Locality 6, Block A, mule trail between El Portachuelo and Mucuchachi (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)

• Collected from bottom part of 2 cubic metre exotic block. Brachiopod similarities tentatively compared with Word Formation, but Palmarito Fm contains Perrinites hilli and Parafusulina of Kungurian age.

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; shelly/skeletal, brown, gray, silty wackestone

• Shallow, warm water of moderate current activity. Lack of noticeable amounts of terrigenous material suggests low-relief coastline. Less restricted than locality 3, as dolomite rhombs are lacking.
• Thick-bedded, petroliferous, light gray to tan silty limestones. Compositionally a spicular biomicrite; texturally a wackestone.

Size class: macrofossils

Preservation: replaced with silica

Collection methods: bulk, chemical,

• Fossils obtained by hydrochloric acid etching.

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 41510: authorized by David Bottjer, entered by Matthew Clapham on 15.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Demospongiae
 Agelasida - Guadalupiidae
Guadalupia minuta Rigby 1984 demosponge
 Lithistida - Chiastoclonellidae
Defordia foliata Rigby 1984 demosponge
 Lithistida - Anthaspidellidae
Jereina robusta Rigby 1984 demosponge
Craniata
 Craniida - Craniidae
Petrocrania teretis Cooper and Grant 1974
Reflects minimum estimate based on valve ratios
Strophomenata
 Productida - Cooperinidae
Cooperina inexpectata Termier et al. 1966
 Productida - Aulostegidae
 Productida - Lyttoniidae
Collemataria venezuelensis n. sp. Hoover 1981
Rhynchonellata
 Spiriferida - Eudoxinidae
Costicrura minuta n. gen. Hoover 1981
 Athyridida - Neoretziidae
 Terebratulida - Notothyrididae
Anaptychius minutus n. gen. Hoover 1981
 Terebratulida - Gillediidae
Aneuthelasma globosum n. sp. Hoover 1981
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
Ramose forms
Stenolaemata
 Fenestrata -
Fenestrata indet. Elias and Condra 1957
Fenestellid forms
Bivalvia
 Pectinida - Pseudomonotidae
Pegmavalvula gloveri Newell and Boyd 1970 scallop
Gastropoda
  -
Gastropoda indet. Cuvier 1795 snail
Holopeiform and high-spired forms
 Caenogastropoda - Orthonematidae
aff. Orthonema sp. Meek and Worthen 1862 snail
n. gen. aff Orthonema
 Pleurotomariacea -
"Pleurotomariacea indet." = Pleurotomarioidea
"Pleurotomariacea indet." = Pleurotomarioidea Swainson 1840 snail