Dicoelosia-Skenidioides Community, Merida Andes: Ludlow, Venezuela
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Rhynchonellata
- Pentamerida
- Parastrophinidae
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? Anastrophia sp.
Hall 1867
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Boucot et al. 1972 | |||||||||
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Rhynchonellata
- Pentamerida
- Gypidulidae
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Gypidula cf. dudleyensis
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Boucot et al. 1972 | |||||||||
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Gypidula sp.
Hall 1867
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Boucot et al. 1972 | |||||||||
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Rhynchonellata
- Rhynchonellida
- Hebetoechiidae
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Sphaerirhynchia sp.
Cooper and Muir-Wood 1951
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Boucot et al. 1972 | |||||||||
| sp. C | ||||||||||
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Rhynchonellata
- Rhynchonellida
- Trigonirhynchiidae
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? Ancillotoechia sp.
Havlicek 1959
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Boucot et al. 1972 | |||||||||
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Rhynchonellata
- Rhynchonellida
- Rhynchotrematidae
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Stegerhynchus aff. praecursor
(Foerste 1909)
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Boucot et al. 1972 | |||||||||
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Rhynchonellata
- Spiriferida
- Delthyrididae
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Howellella sp.
Kozlowski 1946
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Boucot et al. 1972 | |||||||||
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Delthyris sp.
Dalman 1828
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Boucot et al. 1972 | |||||||||
| sp. A | ||||||||||
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Rhynchonellata
- Spiriferida
- Cyrtiidae
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Striispirifer cf. plicatella
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Boucot et al. 1972 | |||||||||
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? Striispirifer sp.
Cooper and Muir-Wood 1951
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Boucot et al. 1972 | |||||||||
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Eospirifer sp.
Schuchert 1913
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Boucot et al. 1972 | |||||||||
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Cyrtia sp.
Dalman 1828
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Boucot et al. 1972 | |||||||||
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Rhynchonellata
- Atrypida
- Lissatrypidae
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? Australina sp.
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Boucot et al. 1972 | |||||||||
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Rhynchonellata
- Atrypida
- Atrypidae
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Atrypa reticularis
(Linnaeus 1758)
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Boucot et al. 1972 | |||||||||
| original and current combination Anomia reticularis | ||||||||||
| species name in quotes | ||||||||||
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Rhynchonellata
- Athyridida
- Nucleospiridae
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Nucleospira sp.
Hall 1859
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Boucot et al. 1972 | |||||||||
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Rhynchonellata
- Athyridida
- Meristellidae
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Meristina sp.
Hall 1867
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Boucot et al. 1972 | |||||||||
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Rhynchonellata
- Athyridida
- Meristidae
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Merista sp.
Suess 1851
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Boucot et al. 1972 | |||||||||
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Rhynchonellata
- Athyridida
- Rhynchospirinidae
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Rhynchospirina sp.
Schuchert and LeVene 1929
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Boucot et al. 1972 | |||||||||
| genus name in quotes | ||||||||||
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Rhynchonellata
- Athyridida
- Anoplothecidae
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Coelospira cf. saffordi
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Boucot et al. 1972 | |||||||||
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Rhynchonellata
- Orthida
- Hesperorthidae
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Ptychopleurella sp.
Schuchert and Cooper 1931
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Boucot et al. 1972 | |||||||||
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Dolerorthis sp.
Schuchert and Cooper 1931
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Boucot et al. 1972 | |||||||||
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Rhynchonellata
- Orthida
- Dicoelosiidae
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Dicoelosia sp.
King 1850
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Boucot et al. 1972 | |||||||||
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Rhynchonellata
- Orthida
- Rhipidomellidae
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Dalejina sp.
Havlicek 1953
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Boucot et al. 1972 | |||||||||
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Rhynchonellata
- Orthida
- Dalmanellidae
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Protocortezorthis sp.
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Boucot et al. 1972 | |||||||||
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Isorthis sp.
Kozlowski 1929
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Boucot et al. 1972 | |||||||||
| sp. C | ||||||||||
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Isorthis cf. arcuaria
(Hall and Clarke 1892)
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Boucot et al. 1972 | |||||||||
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Resserella sp.
Bancroft 1928
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Boucot et al. 1972 | |||||||||
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Rhynchonellata
- Protorthida
- Skenidiidae
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Skenidioides sp.
Schuchert and Cooper 1931
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Boucot et al. 1972 | |||||||||
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Strophomenata
- Strophomenida
- Leptostrophiidae
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Leptostrophia sp.
Hall and Clarke 1892
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Boucot et al. 1972 | |||||||||
| sp. B; genus name in quotes | ||||||||||
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Brachyprion cf. attenuata
Amsden 1951
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Boucot et al. 1972 | |||||||||
| genus name in quotes | ||||||||||
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Strophomenata
- Strophomenida
- Rafinesquinidae
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Leptaena sp.
Dalman 1828
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Boucot et al. 1972 | |||||||||
| sp. D | ||||||||||
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Leptaena cf. delicata
Amsden 1949
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Boucot et al. 1972 | |||||||||
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Strophomenata
- Strophomenida
- Strophonellidae
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Strophonella sp.
Hall 1879
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Boucot et al. 1972 | |||||||||
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Strophonella cf. haueri
(Barrande 1848)
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Boucot et al. 1972 | |||||||||
| recombined as Strophonella (Quasistrophonella) haueri | ||||||||||
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Strophomenata
- Strophomenida
- Amphistrophiidae
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Amphistrophia sp.
Hall and Clarke 1892
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Boucot et al. 1972 | |||||||||
| sp. B | ||||||||||
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Amphistrophia cf. funiculata
(M'Coy 1846)
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Boucot et al. 1972 | |||||||||
| recombined as Amphistrophiella funiculata | ||||||||||
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Strophomenata
- Strophomenida
- Shaleriidae
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Shaleria sp.
Caster 1939
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Boucot et al. 1972 | |||||||||
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Strophomenata
- Strophomenida
- Strophochonetidae
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Shagamella ludloviensis
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Boucot et al. 1972 | |||||||||
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? Protochonetes sp.
Muir-Wood 1962
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Boucot et al. 1972 | |||||||||
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Strophomenata
- Orthotetida
- Chilidiopsidae
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? Chilidiopsis sp.
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Boucot et al. 1972 | |||||||||
| synonym of Fardenia (Coolinia) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Venezuela |
| Coordinates: | 8.6° North, 71.2° West (view map) |
| Paleocoordinates: | 56.4° South, 69.1° West |
| Basis of coordinate: | based on political unit |
| Geographic resolution: | basin |
Time
| Period: | Silurian | Epoch: | Ludlow |
| 10 m.y. bin: | Silurian 2 | ||
| Key time interval: | Ludlow | ||
| Age range of interval: | 427.40000 - 423.00000 m.y. ago |
Stratigraphy
| Formation: | El Horno | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: Ludlow age based on presence of Amphistrophia cf. funiculata, "Brachyprion" cf. attenuata, Shagamella ludloviensis, and Coelospira cf. saffordi (Boucot et al. 1972--PBDB ref. 7026). This was originally part of the Caparo Formation, but that is now restricted to the Sandbian. | |||||
Lithology and environment
| Primary lithology: | gray mudstone |
| Includes fossils? | Y |
| Lithology description: "Most of the shells are disarticulated and occur in a gray mudstone matrix as either coquinas or as shells scattered through poorly bedded matrix." | |
| Environment: | marine indet. |
| Geology comments: "BA 4-5...A normal level of turbulence and oxygenation is indicated by the data." | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | paleoecologic analysis |
| Collection method comments: Table 5 of Boucot et al. 1973 (PBDB ref. 7026). | |
Metadata
| Database number: | 25067 | ||
| Authorizer: | M. Foote | Enterer: | M. Foote |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2002-08-27 12:47:49 | Last modified: | 2018-04-27 23:50:54 |
| Access level: | the public | Released: | 2002-08-27 12:47:49 |
| Creative Commons license: | CC BY |
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] |