Shaqra Group (Dhruma Fm.): Callovian, Saudi Arabia

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Pseudomicromphalites sp.
=Ammo.
Anthozoa - Scleractinia - Microsolenidae
Chomatoseris bouchardi
Anthozoa - Scleractinia - Latomeandridae
Thamnoseris cf. erickleyensis
Rhynchonellata - Rhynchonellida - Tetrarhynchiidae
Burmirhynchia sp. Buckman 1917
Rhynchonellata - Terebratulida - Eudesiidae
Eudesia cardioides Douvillé 1916
recombined as Eudesia (Sphriganaria) cardioides
Rhynchonellata - Terebratulida - Loboidothyrididae
Bihenithyris barringtoni Muir-Wood 1935
Bivalvia - Nuculida - Nuculidae
Nucula cf. cuneiformis Sowerby 1840
recombined as Nucula (Palaeonucula) cuneiformis
Bivalvia - Mytilida - Mytilidae
Modiolus bipartitus Sowerby 1818
Modiolus imbricatus (Sowerby 1818)
recombined as Modiolus (Modiolus) imbricatus
Arcomytilus somaliensis
Falcimytilus aff. suprajurensis (Cox 1925)
Bivalvia - Pectinida - Limidae
Plagiostoma rigidum (Sowerby 1815)
recombined as Lima (Plagiostoma) rigida
Plagiostoma cf. subcardiiformis Greppin 1867
Bivalvia - Pectinida - Entoliidae
Entolium cf. corneolum (Young and Bird 1828)
recombined as Entolium (Entolium) corneolum
Bivalvia - Pectinida - Pectinidae
Chlamys nattheimensis
Chlamys splendens (Dollfus 1863)
Chlamys cf. curvivarians (Dietrich 1933)
Camptonectes laminatus (Sowerby 1818)
Bivalvia - Ostreida - Gryphaeidae
Nanogyra nana (Sowerby 1822)
recombined as Nanogyra (Nanogyra) nana
Nanogyra cf. striata Smith 1817
synonym of Nanogyra (Palaeogyra) virgula
Gryphaea costellata (Douvillé 1916)
Gryphaea bilobata Sowerby 1835
Bilobissa sublobata (Deshayes 1830)
Liostrea cf. hisingeri
Bivalvia - Ostreida - Eligmidae
Eligmus cf. analites
Bivalvia - Ostreida - Pinnidae
Trichites saussurei
Bivalvia - Ostreida - Palaeolophidae
Lopha gregarea (Sowerby 1816)
recombined as Actinostreon gregareum
Lopha solitaria (Sowerby 1824)
synonym of Actinostreon gregareum
Lopha cf. marshii (Sowerby 1814)
recombined as Actinostreon marshi
Bivalvia - Arcida - Parallelodontidae
Parallelodon hirsonensis d'Archiac 1843
Bivalvia - Lucinida - Lucinidae
Fimbria cf. lajoyei d'Archiac 1843
Bivalvia - Lucinida - Mactromyidae
Mactromya cf. concentrica
Bivalvia - Thraciida - Thraciidae
Thracia cf. curtensata
Bivalvia - Pholadomyida - Pholadomyidae
Pholadomya lirata (Sowerby 1818)
Pholadomya protei (Brongniart 1821)
recombined as Pholadomya (Bucardiomya) protei
Homomya cf. gibbosa Sowerby 1814
Bivalvia - Pholadida - Ceratomyidae
Gresslya ex gr. gregaria (von Zieten 1833)
Ceratomya cf. ovalis
Ceratomya excentrica (Roemer 1836)
Ceratomya cf. concentrica Sowerby 1822
Bivalvia - Cardiida - Cardiidae
Protocardia ex gr. hillanum
Protocardia cf. subhillanum
Bivalvia - Megalodontida - Ceratomyopsidae
Ceratomyopsis cf. arabica (Cox 1935)
Bivalvia - Megalodontida - Dicerocardiidae
Pseudisocardia cf. macfadyeni Cox 1935
Bivalvia - Carditida - Astartidae
Neocrassina ovata
Astarte scytalis Holdhaus 1913
synonym of Seebachia (Eoseebachia) sowerbyana
Bivalvia - Trigoniida - Trigoniidae
Trigonia ex gr. pullus Sowerby 1826
Cephalopoda - Proplanulitidae
Proplanulitidae sp. Buckman 1921
=cf.Obtusicostites=Ammon.
Echinoidea - Cidaroida - Rhabdocidaridae
Rhabdocidaris mogharensis
see common names

Geography
Country:Saudi Arabia
Coordinates: 25.4° North, 45.5° East (view map)
Paleocoordinates:0.5° South, 33.7° East
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Jurassic Epoch:Middle Jurassic
Stage:Callovian 10 m.y. bin:Jurassic 5
Key time interval:Callovian
Age range of interval:165.30000 - 161.50000 m.y. ago
Stratigraphy
Geological group:Shaqra Formation:Dhruma Member:Hisyan Mb.
Local section:Coupe du Khashm al Hayyal (Qasab) Local bed:D7,a
Local order:bottom to top
Lithology and environment
Primary lithology: lithified "limestone"
Includes fossils?Y
Lithology description: bioclastic, arenitic
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:48588
Authorizer:F. Fursich Enterer:S. Hicks
Modifier:S. Hicks Research group:marine invertebrate
Created:2005-03-24 02:22:41 Last modified:2005-03-24 05:23:22
Access level:the public Released:2005-03-24 02:22:41
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]