Shaqra Group (Dhruma Fm.): Bajocian, Saudi Arabia
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda
- Ammonitida
- Stephanoceratidae
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Ermoceras arabicum
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Ermoceras sp.
Douvillé 1916
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=s.sp. | ||||||||||
Ermoceras coronatoides
(Douvillé 1916)
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Ermoceras splendens
Arkell 1952
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Ermoceras runcinatum
Arkell 1952
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Ermoceras elegans
Douvillé 1916
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recombined as Ermoceras (Kosmermoceras) elegans | ||||||||||
Cephalopoda
- Ammonitida
- Perisphinctidae
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Leptosphinctes sp.
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Cephalopoda
- Nautilida
- Cenoceratidae
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Metacenoceras sp.
Tinant 1984
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=n.sp.A=Naut. | ||||||||||
Bivalvia
- Ostreida
- Eligmidae
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Eligmus sp.
Eudes-Deslongchampes 1856
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Bivalvia
- Ostreida
- Palaeolophidae
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Lopha solitaria
(Sowerby 1824)
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synonym of Actinostreon gregareum | ||||||||||
Rhynchonellata
- Rhynchonellida
- Tetrarhynchiidae
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Burmirhynchia termierae
Rousselle 1965
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Rhynchonellata
- Terebratulida
- Lobothyrididae
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Tubithyris chouberti
Rousselle 1965
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Rhynchonellata
- Terebratulida
- Lissajousithyrididae
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Monsardithyris ventricosa
(Hartmann 1830)
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Rhynchonellata
- Terebratulida
- Eudesiidae
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Eudesia magharensis
Farag 1960
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recombined as Eudesia (Sphriganaria) magharensis | ||||||||||
Echinoidea
- Clypeidae
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Clypeus sp.
Leske 1778
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=n.sp.2 | ||||||||||
Echinoidea
- Holectypoida
- Holectypidae
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Holectypus depressus
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Echinoidea
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Leioechinus namus
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Echinoidea
- Salenioida
- Acrosaleniidae
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Acrosalenia sp.
Agassiz 1840
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=sp.A | ||||||||||
Recrosalenia sp.
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=n.sp.2 | ||||||||||
Echinoidea
- Stomopneustoida
- Stomechinidae
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Polycyphus parvituberculatus
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Echinoidea
- Cidaroida
- Rhabdocidaridae
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Rhabdocidaris mogharensis
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Anthozoa
- Scleractinia
- Zardinophyllidae
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Epismiliopsis sp.
Alloiteau 1952
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=n.sp.2 | ||||||||||
Anthozoa
- Scleractinia
- Thamnasteriidae
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Thamnasteria dumorti
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see common names |
Geography
Country: | Saudi Arabia |
Coordinates: | 25.3° North, 45.5° East (view map) |
Paleocoordinates: | 0.6° South, 33.7° East |
Basis of coordinate: | stated in text |
Geographic resolution: | outcrop |
Time
Period: | Jurassic | Epoch: | Middle Jurassic |
Stage: | Bajocian | 10 m.y. bin: | Jurassic 4 |
Key time interval: | Bajocian | ||
Age range of interval: | 170.90000 - 168.20000 m.y. ago |
Stratigraphy
Geological group: | Shaqra | Formation: | Dhruma |
Local section: | Coupe du Graben Durma (near of Qasab) | Local bed: | D2,2 |
Local order: | bottom to top |
Lithology and environment
Primary lithology: | lithified "limestone" | ||
Includes fossils? | Y | ||
Environment: | lagoonal/restricted shallow subtidal | Tectonic setting: | cratonic basin |
Geology comments: The Dhruma Fm essentially is composed of limestones and clayey rocks in its central outcrop zone but passes to detrial facies northwards and southwards. |
Taphonomy
Size of fossils: | macrofossils,microfossils |
Collection methods and comments
Collection methods: | bulk,mechanical,field collection |
Reason for describing collection: | biostratigraphic analysis |
Metadata
Database number: | 48112 | ||
Authorizer: | F. Fursich | Enterer: | S. Hicks |
Modifier: | S. Hicks | Research group: | marine invertebrate |
Created: | 2005-03-14 04:14:06 | Last modified: | 2005-03-14 06:14:06 |
Access level: | the public | Released: | 2005-03-14 04:14:04 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
11728. | J. Manivit, Y.-M. Le Nindre, and D. Vaslet. 1990. Le Jurassique D`Arabie Centrale. Document du BRGM 4(194):25-519 [F. Fursich/S. Hicks/W. Kiessling] |