Antirhynchonella Community, Merida Andes: Llandovery - Wenlock, Venezuela

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Brachiopoda indet. Cuvier 1805
Boucot et al. 1972
orthotetacid
Rhynchonellata - Rhynchonellida
Boucot et al. 1972
Rhynchonellata - Rhynchonellida - Hebetoechiidae
Boucot et al. 1972
Rhynchonellata - Orthida - Hesperorthidae
Boucot et al. 1972
Rhynchonellata - Orthida - Proschizophoriidae
Boucot et al. 1972
Rhynchonellata - Orthida - Dalmanellidae
Dalmanellidae indet. Schuchert 1913
Boucot et al. 1972
Resserella sp. Bancroft 1928
Boucot et al. 1972
Isorthis sp. Kozlowski 1929
Boucot et al. 1972
Isorthis aff. arcuaria (Hall and Clarke 1892)
Boucot et al. 1972
Rhynchonellata - Spiriferida - Cyrtiidae
Cyrtia sp. Dalman 1828
Boucot et al. 1972
Eospirifer sp. Schuchert 1913
Boucot et al. 1972
sp. C
Rhynchonellata - Spiriferida - Delthyrididae
Boucot et al. 1972
Rhynchonellata - Atrypida - Atrypidae
Plectatrypa sp. Schuchert and Cooper 1930
Boucot et al. 1972
Plectatrypa imbricata (Sowerby and Murchison 1839)
Boucot et al. 1972
Atrypa sp. Dalman 1828
Boucot et al. 1972
Boucot et al. 1972
species name in quotes
Rhynchonellata - Pentamerida - Parastrophinidae
Anastrophia sp. Hall 1867
Boucot et al. 1972
Rhynchonellata - Pentamerida - Clorindidae
Antirhynchonella sp. Oehlert 1887
Boucot et al. 1972
Rhynchonellata - Pentamerida - Gypidulidae
Gypidulidae indet. Schuchert and Le Vene 1929
Boucot et al. 1972
Rhynchonellata - Athyridida - Meristellidae
Meristina sp. Hall 1867
Boucot et al. 1972
Rhynchonellata - Athyridida - Nucleospiridae
Nucleospira sp. Hall 1859
Boucot et al. 1972
Strophomenata - Strophomenida - Furcitellidae
Pentlandina sp. Bancroft 1949
Boucot et al. 1972
Strophomenata - Strophomenida - Rafinesquinidae
Leptaena sp. Dalman 1828
Boucot et al. 1972
Strophomenata - Strophomenida - Amphistrophiidae
? Amphistrophia spp. Hall and Clarke 1892
Boucot et al. 1972
Strophomenata - Strophomenida - Sowerbyellidae
Boucot et al. 1972
Strophomenata - Orthotetida - Chilidiopsidae
Boucot et al. 1972
see common names

Geography
Country:Venezuela
Coordinates: 8.6° North, 71.2° West (view map)
Paleocoordinates:66.8° South, 114.4° West (Wright 2013)
Basis of coordinate:based on political unit
Geographic resolution:basin
Time
Period: Silurian Epoch: Llandovery - Wenlock
10 m.y. bin: Silurian 1 - Silurian 2
*Epoch:Late/Upper Llandovery - Early/Lower Wenlock
Key time interval: Llandovery - Wenlock
Age range of interval: 443.1 - 426.7 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:El Horno
Stratigraphic resolution:formation
Stratigraphy comments: This was originally part of the Caparo Formation, but that is now restricted to the Sandbian.
Lithology and environment
Primary lithology: mudstone
Includes fossils?Y
Lithology description: "Occurs mostly in shell lenses, and as scattered shells, in poorly bedded mudstone."
Environment:marine indet.
Geology comments: "Most of the shells are disarticulated, consistent with a normal level of turbulence and oxygenation. The community group [Janius] and diversity indicate a BA 3 assignment."
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:paleoecologic analysis
Collection method comments: Tables 3 and 4 of Boucot et al. 1973 (PBDB ref. 7026).
Metadata
Database number:25066
Authorizer:M. Foote Enterer:M. Foote
Modifier:P. Wagner Research group:marine invertebrate
Created:2002-08-27 12:31:58 Last modified:2025-02-22 15:12:02
Access level:the public Released:2002-08-27 12:31:58
Creative Commons license:CC0
Reference information

Primary reference:
7007. A. J. Boucot, J. L. Benedetto, Y. Grahn, J. H. G. Melo, T. M. Sanchez and B. A. Waisfeld. 1999. South American marine Silurian communities. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 841-848 [M. Foote/M. Foote/M. Foote]

Secondary references:

7026 A. J. Boucot, J. G. Johnson, and R. Shagam. 1972. Braquiopodos siluricos de los Andes meridenos de Venezuela. Boletin de Geologica Publicacion Especial (5)585-727 [M. Foote/M. Foote/M. Foote]